静态文本版 · 收录 71 项服务 / 12 个分类 · 每类附选型建议 · 核实日期 2026-09-16（启用 JavaScript 后可交互检索）
🧩 零成本独立开发者技术栈（按一期可落地口径）
- 静态站 / 博客：Cloudflare Pages（带宽不限、允许商用，自带自定义域名与 SSL）+ 源码托管 GitHub（公开仓库 Actions 分钟数不限）
- 带登录与数据库的全栈应用：Supabase（Postgres 500MB × 2、Auth 5 万 MAU、1GB 存储）或 Neon（0.5GB × 100 项目），认证可叠 Clerk / Auth0 免费档
- 只读 API / 边缘逻辑：Cloudflare Workers（10 万请求/天）+ Cloudflare D1（5GB、500 万行读/天）
- 文件与图片：图片走 ImageKit（20GB 带宽 + 20GB 存储/月），普通文件走 UploadThing（2GB），备份与大文件走 Cloudflare R2（10GB、零出口费）
- 用户触达：事务邮件 Resend（3000 封/月），Newsletter Brevo（300 封/天、联系人数不限）
- 上线后可观测：Sentry（5000 错误/月）+ PostHog（100 万事件/月）+ Checkly（5 万次拨测/月）
- 团队协作：Linear（≤10 人免费）或 Trello / ClickUp（成员不限）+ Notion（个人版无限 blocks）+ Bitwarden（无限密码与设备同步）
- 编码环节：OpenCode（Zen 网关免费模型 50 次/天 + 1000 次/月）或 Cline + Google AI Studio（约 1500 次/天），全链路无需绑卡
- 唯一躲不掉的开支：独立域名。按 Porkbun 当前报价，.com 约 $11.08/年且注册价即续费价；.xyz 首年 $2.04 但续费 $14.21，长期运营不划算
⌨️ AI 编程与模型额度ai coding agents & models
3 项 · 测试期免费 1 · 永久免费 2 · 开源优先 · BYOK 或自带免费额度 · 更新于 2026-09-16
书生·端砚 墨点计划测试期免费 · 免费墨点（1点≈2000万 tokens）
免费额度：上海 AI Lab（PJLab）书生·端砚科学发现平台的科研模型 Token Plan：登录后领取「免费墨点」，1 墨点 ≈ 2000 万 tokens，用于调用书生科研模型（S2 / S1 / W0 系列）与平台内科研服务；提供 OpenAI 兼容 API Key（单账号最多 10 个）
限制与注意：官方未公开具体额度（登录墨点页点「领取」后可见）；限额按 5 小时 / 7 天滚动窗口恢复，账号级共享 RPM / TPM；定位科研场景，测试期政策可能调整
是否需绑卡：需注册
discovery.intern-ai.org.cn/token-plan/home?tabIndex=0 ↗Cline永久免费 · 本体免费无限
免费额度：开源（Apache 2.0）自主编程智能体，VS Code / JetBrains / CLI / Web 全形态；本体永久免费，BYOK 接入 30+ 模型供应商（OpenRouter、Anthropic、DeepSeek 直连等），本地 Ollama 完全零成本；团队版前 10 席免费
限制与注意：工具免费但 token 走 API 计费（Claude 重度约 $15~40/月；DeepSeek 直连约 ¥15~25/月）
是否需绑卡：BYOK
cline.bot ↗OpenCode永久免费 · 50 次/天 + 1000/月
免费额度：开源（MIT）终端优先编程智能体（SST 团队）；Zen 网关自带免费模型：50 次请求/天 + 1000 次/月（UTC 0 点即北京时间早 8 点重置），免费模型轮换（DeepSeek V4 Flash Free、MiMo-V2.5 Free、Big Pickle 等）；BYOK 可接 75+ 供应商
限制与注意：免费模型为反馈收集期，数据可能用于训练；限速约 10 次/分
是否需绑卡：无需绑卡
opencode.ai ↗
🔎 AI 编程额度：选型与口径
- 零成本 AI 编程的两条确定路径：OpenCode（终端形态，MIT 开源）自带 Zen 网关免费模型，50 次/天 + 1000 次/月，无需绑卡；Cline（Apache 2.0，BYOK）本体永久免费，成本取决于所接 API
- 额度重置口径：OpenCode Zen 按 UTC 零点重置，即北京时间每天早上 8 点；「50 次/天」是硬节流，适合轻量日常编码，不适合一次性批量重构
- 接免费模型 API 的三档选择：Google AI Studio（约 1500 次/天）额度最高；智谱 Flash 属永久免费档；本地 Ollama 完全零成本但消耗本机算力
- BYOK 不等于免费：选型顺序应是「先定 API，再定客户端」——客户端只决定体验，真正的成本与额度由 API 决定
- 科研向补充：上海 AI Lab 书生·端砚「墨点计划」按测试期发放免费墨点，1 墨点约等于 2000 万 tokens，适合论文与科学计算场景
- 结论：想要「装上就能用且不绑卡」，选 OpenCode；想要「完全可控、随时换模型」，选 Cline + 免费 API 组合
🎨 图像语音视频image / voice / video
4 项 · 永久免费 2 · 每日刷新 2 · 2026-08 实测 · 2026-09-16 复核，网页端免费额度为主
Google Gemini 生图永久免费 · ~100 图/天
免费额度：约 100 张图/天（无水印），Nano Banana 系列图像生成 / 编辑
限制与注意：高峰期限流；免费档分辨率 / 速度受限
是否需绑卡：Google 账号
gemini.google.com ↗Leonardo AI每日刷新 · 150 tokens/天
免费额度：约 150 tokens/天（每天刷新），可生成数十张图
限制与注意：网页端；高级模型消耗 token 更快
是否需绑卡：无需绑卡
leonardo.ai ↗ElevenLabs永久免费 · 1 万 tokens/月
免费额度：约 10,000 tokens/月 TTS 语音合成
限制与注意：非商用；需署名
是否需绑卡：无需绑卡
elevenlabs.io ↗Suno每日刷新 · 50 credits/天
免费额度：约 50 credits/天 音乐生成
限制与注意：免费档非商用、排队生成
是否需绑卡：无需绑卡
suno.com ↗
🔎 图像 / 语音 / 音乐额度：怎么配不浪费
- 出图额度最高的一档是 Google Gemini 生图：约 100 张/天、无水印，Nano Banana 系列支持生成与编辑；Leonardo AI 的 150 tokens/天适合作为补充
- 语音合成看 ElevenLabs：免费档约 1 万 tokens/月，折算下来适合 Demo 与短视频配音，做不了长内容批量生产
- 音乐用 Suno：约 50 credits/天、每日刷新，适合试听与素材生成
- 共同限制：以上均为网页端 / 官方应用口径；商用授权与 API 调用通常另计费，接入 API 前先确认商用条款
- 建议组合：出图用 Gemini、配音用 ElevenLabs、素材音乐用 Suno——三条线都不需要绑卡，可并行使用
🚀 托管与计算hosting / compute
11 项 · 永久免费 10 · 试用 1 · 静态托管基本永久免费；后端 PaaS 免费层普遍休眠
Cloudflare Pages永久免费 · 带宽不限
免费额度：带宽不限；100 个站点；500 次构建/月；Pages Functions 走 Workers（10 万请求/天）；自定义域名 + SSL
限制与注意：每项目 2 万文件上限；允许商用
是否需绑卡：无需绑卡
pages.cloudflare.com ↗Render永久免费 · 750 小时/月
免费额度：免费静态站（100GB 带宽、750 构建分钟）；免费 Web 服务（512MB RAM / 0.1 CPU，750 小时/月）；免费 Postgres（256MB）与 Redis（25MB）
限制与注意：Web 服务 15 分钟无访问即休眠（冷启动 30~60 秒）；免费 Postgres 30 天不活跃数据删除
是否需绑卡：无需绑卡
render.com ↗Vercel Hobby永久免费 · 100GB + 6k 分钟
免费额度：100 GB 带宽/月；6000 构建分钟/月；100 万次函数调用；1M Edge 请求；无限个人站点
限制与注意：禁止商用（个人非商业项目）；加第二个成员即需 Pro $20/人/月
是否需绑卡：无需绑卡
vercel.com ↗Netlify永久免费 · 300 credits/月
免费额度：300 credits/月（信用点制：流量约 20 credits/GB，构建约 15 credits/次），表单 100 条/月，函数 12.5 万次/月
限制与注意：信用点用完站点暂停；比旧版 100GB 带宽制收紧
是否需绑卡：无需绑卡
netlify.com ↗GitHub Pages永久免费 · 100GB 带宽
免费额度：100 GB 带宽/月（软上限）；每仓库 1GB；每账号 + 每仓库各 1 个站点
限制与注意：仅静态站；自动 Jekyll 构建
是否需绑卡：无需绑卡
pages.github.com ↗Cloudflare Workers永久免费 · 10 万请求/天
免费额度：10 万请求/天；10ms CPU/请求；无限部署；边缘零冷启动
限制与注意：CPU 时间限制严；KV / D1 / R2 各有独立额度
是否需绑卡：无需绑卡
workers.cloudflare.com ↗Deno Deploy永久免费 · 100GB 流量
免费额度：100 GB 出口流量/月；15 小时 CPU/月；10 万请求/天；无限站点
限制与注意：仅 Deno / Web 标准 API
是否需绑卡：无需绑卡
deno.com ↗Koyeb永久免费 · 1 实例 + PG
免费额度：免费 Web 服务 1 个（1 vCPU / 512MB RAM）+ 免费 Postgres（scale-to-zero）
限制与注意：仅 1 个免费实例；规格口径随版本调整
是否需绑卡：无需绑卡
koyeb.com ↗Railway试用 · $5 试用
免费额度：$5 一次性试用额度（30 天），1 项目 3 服务
限制与注意：试用制，非永久；之后最低 $1/月
是否需绑卡：无需绑卡
railway.com ↗Val Town永久免费 · 50 vals
免费额度：50 个 vals，每小时 1 个 cron 任务
限制与注意：轻量脚本 / 钩子场景
是否需绑卡：无需绑卡
val.town ↗Surge.sh永久免费 · 无限站点
免费额度：无限静态站点发布，一行命令部署
限制与注意：仅静态
是否需绑卡：无需绑卡
surge.sh ↗
🔎 托管与计算：免费档的真实边界
- 静态站首选 Cloudflare Pages：带宽不限、允许商用、自带自定义域名与 SSL；Vercel Hobby 同样永久免费但明确禁止商用，商业项目不要踩线
- 免费 PaaS 的通用风险是休眠：Render 免费 Web 服务 15 分钟无访问即休眠，冷启动 30~60 秒，不适合对延迟敏感的服务
- 额度口径会变，老教程数字已失效：Netlify 已从「100 GB 带宽」改为「300 credits/月」信用点制（流量约 20 credits/GB、构建约 15 credits/次）
- 边缘函数免费额度对比：Cloudflare Workers 10 万请求/天（10ms CPU/请求）与 Deno Deploy 10 万请求/天 + 100GB 出口流量，两者量级相当
- 想要常驻的有状态服务：Koyeb 提供 1 个 Web 服务实例（1 vCPU / 512MB）+ 免费 Postgres，适合小型常驻 API
- 组合建议：前端 Cloudflare Pages + 边缘逻辑 Workers + 定时任务 Val Town——这套组合全部免费且都无需绑卡
🗄️ 数据库databases
12 项 · 永久免费 12 · 关系型 / KV / 边缘库；RU=请求单元计量
Supabase永久免费 · 500MB × 2
免费额度：Postgres 500MB × 2 个活跃项目；Auth 5 万 MAU；文件存储 1GB；Edge Functions 50 万次/月；API 无限次
限制与注意：项目 1 周不活跃暂停（可后台恢复，不删数据）；无自动备份
是否需绑卡：无需绑卡
supabase.com ↗Neon永久免费 · 0.5GB × 100
免费额度：每项目 0.5GB × 100 个项目；每项目 100 CU 小时/月；10 分支/项目；scale-to-zero 不暂停项目
限制与注意：5 分钟无活动计算归零（冷启动 0.5~1 秒）
是否需绑卡：无需绑卡
neon.tech ↗Cloudflare D1永久免费 · 5GB / 500 万行读
免费额度：SQLite 边缘库：5GB 存储；500 万行读/天 + 10 万行写/天
限制与注意：只能从 Workers 内访问；按「行」计量
是否需绑卡：无需绑卡
developers.cloudflare.com ↗TiDB Cloud Starter永久免费 · 25 GiB + 2.5 亿 RU
免费额度：MySQL 兼容分布式库（原 Serverless，2025-08 更名 Starter）：每实例 5 GiB 行存 + 5 GiB 列存 + 5000 万 RU/月；每组织最多 5 个免费实例（合计 25 GiB 行存 + 2.5 亿 RU/月）；自带 HTAP 与向量搜索
限制与注意：超量后读写限流至次月重置；连接强制 TLS；用户名需带实例前缀
是否需绑卡：无需绑卡
tidbcloud.com ↗Turso永久免费 · 5GB + 5 亿行读
免费额度：SQLite(libSQL)：5GB 总存储；5 亿行读/月 + 1000 万行写/月；100 个数据库
限制与注意：仅数据库（无 Auth / 存储 / 函数）
是否需绑卡：无需绑卡
turso.tech ↗MongoDB Atlas永久免费 · 512MB
免费额度：M0 集群 512MB，永久免费（AWS / Azure / GCP 任选）
限制与注意：共享内存 / CPU，超 100 ops/s 限流；500 并发连接
是否需绑卡：需绑卡
mongodb.com ↗Upstash Redis永久免费 · 256MB / 50 万命令
免费额度：Redis 256MB；50 万命令/月；10GB 带宽（另有 Kafka 免费档）
限制与注意：免费 1 个数据库；到量即限流
是否需绑卡：无需绑卡
upstash.com ↗CockroachDB永久免费 · 10 GiB
免费额度：分布式 SQL：10 GiB 存储；5000 万请求单元/月
限制与注意：按 Request Units 计量
是否需绑卡：需绑卡
cockroachlabs.com ↗Prisma Postgres永久免费 · 500MB × 50
免费额度：500MB × 最多 50 个库；10 万 Prisma ops/月
限制与注意：按 Prisma 操作数计量
是否需绑卡：无需绑卡
prisma.dev ↗Convex永久免费 · 100 万调用/月
免费额度：0.5GB 存储；100 万函数调用/月
限制与注意：后端即服务模型，非裸数据库
是否需绑卡：无需绑卡
convex.dev ↗Nile永久免费 · 1GB
免费额度：多租户 Postgres：1GB；5000 万查询 token/月
限制与注意：新平台，按「查询 token」计量
是否需绑卡：无需绑卡
thenile.dev ↗Cloud Firestore永久免费 · 50K 读/天
免费额度：1 GiB 存储；5 万读/天 + 2 万写/天；Realtime DB 1GB + 10GB 下载/月
限制与注意：每日额度按太平洋时间零点重置
是否需绑卡：Google 账号
firebase.google.com ↗
🔎 数据库：按免费存储额度排序选型
- 免费存储额度从大到小：TiDB Cloud Starter 25 GiB ＞ CockroachDB 10 GiB ＞ Turso 5GB ≈ Cloudflare D1 5GB ＞ Nile 1GB ＞ Supabase / Neon / Prisma Postgres（500MB 级）＞ MongoDB Atlas 512MB ＞ Upstash Redis 256MB
- 按场景直接对号入座：全栈一体选 Supabase；多项目与 Serverless 选 Neon；边缘与高读选 Turso 或 Cloudflare D1；要 MySQL 兼容且额度最大选 TiDB Cloud Starter
- 「暂停」与「休眠」不是一回事：Supabase 免费项目 1 周不活跃会暂停（数据保留，需手动恢复）；Neon 是 scale-to-zero 休眠，5 分钟无活动计算归零、冷启动约 0.5~1 秒；Turso 与 D1 没有项目级暂停概念
- KV / 缓存场景：Upstash Redis 256MB + 50 万命令/月，适合限流、会话与轻量队列，不适合当主库
- 要不要绑卡：MongoDB Atlas 与 CockroachDB 免费档需要绑卡，其余多数不需要——不想绑卡就优先避开这两个
- 反锁定原则：只选标准引擎（Postgres / MySQL / SQLite 兼容），保证 pg_dump / mysqldump 随时可迁出，避免依赖厂商专有扩展
🚀 开发部署dev & deploy
2 项 · 永久免费 2 · 代码托管 / CI / 云基础设施
GitHub永久免费 · 2k 分钟/月
免费额度：无限公开 + 私有仓库；Actions 2000 分钟/月（私有库，公开库无限）；Copilot 免费档（每月有限补全额度）；Codespaces 每月免费核时
限制与注意：Actions 分钟数按 OS 加权（Windows 2×、macOS 10×）
是否需绑卡：无需绑卡
github.com ↗Cloudflare 全家桶永久免费 · CDN+R2 10GB
免费额度：CDN / DNS 永久免费（不限流量、DDoS 防护）；R2 对象存储 10GB + 1000 万次操作/月（零出口费）；KV 10 万读/天；Workers 10 万请求/天；Tunnel 内网穿透免费
限制与注意：R2 免费层需绑卡；单请求 CPU 10ms
是否需绑卡：R2 需绑卡
cloudflare.com ↗
🔎 代码托管与云基础设施：免费额度叠加
- GitHub 免费档对开源最友好：公开仓库 Actions 分钟数不限，私有仓库 2000 分钟/月；Copilot 另有独立免费档
- Cloudflare 全家桶是「免费基础设施」里覆盖最全的一家：CDN / DNS 不限流量且含 DDoS 防护，R2 对象存储 10GB + 1000 万次操作/月，KV 每天 10 万次读
- R2 的差异点是零出口流量费：它替代 S3 存放静态资源与备份时可显著省钱；代价是需要绑卡
- 组合建议：代码放 GitHub、静态资源放 R2 或 Pages、边缘逻辑走 Workers——三者免费额度互不冲突，可以叠加使用
📧 邮件服务email apis
3 项 · 永久免费 3 · 事务邮件 / 营销邮件
Resend永久免费 · 3000 封/月
免费额度：事务邮件 3000 封/月（100 封/天）；1 个自定义域名
限制与注意：超量即停；营销联系人 1000
是否需绑卡：无需绑卡
resend.com ↗Brevo永久免费 · 300 封/天
免费额度：邮件 300 封/天（约 9000 封/月），联系人数无限
限制与注意：每日额度制
是否需绑卡：无需绑卡
brevo.com ↗Postmark永久免费 · 100 封/月
免费额度：事务邮件 100 封/月
限制与注意：额度较小，适合关键事务邮件
是否需绑卡：无需绑卡
postmarkapp.com ↗
🔎 邮件服务：事务邮件与 Newsletter 分开选
- 事务邮件（验证码、订单通知）优先 Resend：3000 封/月（100 封/天）且无需绑卡；Postmark 只有 100 封/月，额度偏紧但投递质量口碑好
- Newsletter 与联系人管理选 Brevo：300 封/天（约 9000 封/月），联系人数不限，适合早期订阅制内容
- 常见坑：免费档通常只允许 1 个自定义域名，且要求配置 SPF / DKIM，未配置会直接进垃圾箱
- 组合建议：事务邮件走 Resend、Newsletter 走 Brevo，两边免费额度分开用，避免单月爆量互相挤占
🔐 认证登录authentication
3 项 · 永久免费 3 · MAU=月活跃用户
Clerk永久免费 · 1 万 MAU
免费额度：认证：1 万 MAU（一说 5 万留存用户/月，口径随版本）
限制与注意：超出后 $25/月起
是否需绑卡：无需绑卡
clerk.com ↗Auth0永久免费 · 2.5 万 MAU
免费额度：认证：2.5 万 MAU；社交登录无限；1 个企业连接
限制与注意：免费档无高级功能
是否需绑卡：无需绑卡
auth0.com ↗Logto永久免费 · 5000 MAU
免费额度：云版 5000 MAU；开源自托管无限
限制与注意：需自己运维（自托管）
是否需绑卡：无需绑卡
logto.io ↗
🔎 认证登录：MAU 额度对比与自托管退路
- 免费额度排序：Auth0 2.5 万 MAU ＞ Clerk 1 万 MAU（部分版本口径为 5 万留存用户/月）＞ Logto 云版 5000 MAU
- 自托管可绕开额度上限：Logto 开源自托管后 MAU 无上限，代价是自己维护数据库与版本升级
- 企业级能力容易被忽略：社交登录在 Auth0 免费档不限数量，但企业连接（SAML / SSO）只给 1 个，B 端项目要提前算
- 选型建议：面向 C 端且要求快速接入选 Clerk；需要合规与多协议选 Auth0；想彻底控成本且能自运维选 Logto 自托管
📈 监控分析monitoring & analytics
8 项 · 永久免费 8 · 错误监控 / 产品与流量分析 / LLM 可观测
Sentry永久免费 · 5k 错误/月
免费额度：错误监控 5000 错误/月；追踪 500 万 span/月；会话回放 50 次/月；1 个 cron 监控
限制与注意：仅 1 个成员席位；数据保留 30 天
是否需绑卡：无需绑卡
sentry.io ↗PostHog永久免费 · 1M 事件/月
免费额度：产品分析 100 万事件/月；会话回放 5000 次/月；特性开关 100 万请求/月
限制与注意：可自托管无限
是否需绑卡：无需绑卡
posthog.com ↗Checkly永久免费 · 5 万次/月
免费额度：监控 / E2E：5 万次检查运行/月
是否需绑卡：无需绑卡
checklyhq.com ↗Langfuse永久免费 · 5 万单元/月
免费额度：LLM 可观测：5 万单元/月；2 用户
限制与注意：数据保留 30 天；开源自托管无限
是否需绑卡：无需绑卡
langfuse.com ↗Helicone永久免费 · 1 万请求/月
免费额度：LLM 网关日志 1 万请求/月；1GB 存储
限制与注意：保留 7 天；写入限速 10 条/分
是否需绑卡：无需绑卡
helicone.ai ↗Braintrust永久免费 · 1 万评分/月
免费额度：LLM 评估：1 万次评分/月；$10 赠送额度
限制与注意：保留 14 天
是否需绑卡：无需绑卡
braintrust.dev ↗Umami / Plausible永久免费 · 无限（自托管）
免费额度：开源隐私分析，自托管完全免费无限
限制与注意：需自己部署（Render / CF Pages 均可）
是否需绑卡：无需绑卡
umami.is ↗Google Analytics永久免费 · 无限
免费额度：完全免费无限流量分析
限制与注意：数据隐私 / 粒度问题（GA4 上手成本）
是否需绑卡：Google 账号
analytics.google.com ↗
🔎 监控与分析：免费档三件套怎么搭
- 错误监控选 Sentry：5000 错误/月 + 500 万 span/月 + 50 次会话回放，无需绑卡，是免费档里最完整的一档
- 产品分析选 PostHog：100 万事件/月 + 5000 次会话回放 + 100 万次特性开关请求，事件额度明显高于同类
- LLM 应用可观测是三件套：Langfuse（5 万单元/月）做链路追踪、Helicone（1 万请求/月）做网关日志、Braintrust（1 万次评分/月，另送 10 美元额度）做评估
- 隐私合规优先选 Umami / Plausible 自托管：完全免费无限且不采集个人数据；不想自托管则用 Google Analytics（无限免费，以数据换服务）
- 组合建议：上线前用 Checkly（5 万次检查/月）做可用性拨测，上线后 Sentry 接错误、PostHog 接行为，有 LLM 功能再加 Langfuse
💬 社区协作community
2 项 · 永久免费 2 · 团队与社区沟通
Discord永久免费 · 全功能免费
免费额度：完全免费：无限成员（单服务器上限 50 万）、无限消息历史（Slack 免费档仅 90 天）、语音/视频/屏幕共享、500 频道/服务器、完整 Bot 生态
限制与注意：文件上传免费档约 10MB；串流 720p/30fps；Nitro（$2.99 起）属个人增强非必需
是否需绑卡：无需绑卡
discord.com ↗Slack永久免费 · 90 天历史
免费额度：无限频道、无限成员
限制与注意：消息历史仅 90 天；集成 10 个；仅 1:1 通话
是否需绑卡：无需绑卡
slack.com ↗
🔎 社区协作：免费档差距最大的一项
- 消息历史是分水岭：Slack 免费版只保留 90 天历史（频道与成员数不限），Discord 完全免费且消息历史无限
- 技术社区与开源项目优先 Discord：单服务器上限 50 万成员、每服务器 500 个频道，语音 / 视频 / 屏幕共享与机器人生态全部免费
- 如果必须用 Slack（企业对接或已有工作流），把关键结论沉淀到外部文档，避免 90 天前的讨论变得不可检索
📦 其他misc
2 项 · 永久免费 2 · 文件 / 媒体基础设施
UploadThing永久免费 · 2GB 存储
免费额度：文件上传 2GB 存储，上传次数无限
限制与注意：React / Next.js 生态优先
是否需绑卡：无需绑卡
uploadthing.com ↗ImageKit永久免费 · 20GB × 2
免费额度：图片 CDN / 优化：20GB 带宽 + 20GB 存储/月
限制与注意：高级变换功能付费
是否需绑卡：无需绑卡
imagekit.io ↗
🔎 文件与媒体基础设施：两件套叠加
- 普通文件上传选 UploadThing：2GB 存储、上传次数不限，适合原型与中小项目
- 图片 CDN 与实时优化选 ImageKit：20GB 带宽 + 20GB 存储/月，自带裁剪、格式转换与全球加速
- 组合建议：图片走 ImageKit 做优化与分发、其余文件走 UploadThing，两者免费额度独立叠加
📊 效率 SaaSproductivity saas
14 项 · 永久免费 14 · 标注的是最容易被忽略的「真实限制」
Notion永久免费 · 无限 blocks
免费额度：个人版无限 blocks + 无限页面；小团队免费（≤10 协作者）
限制与注意：版本历史仅 7 天；单文件上传 5MB；无页面分析
是否需绑卡：无需绑卡
notion.so ↗Figma永久免费 · 3 + 3 文件
免费额度：3 个设计文件 + 3 个 FigJam 文件；无限查看者；3 协作编辑者
限制与注意：3 文件上限（项目一多立刻撞墙）；无版本历史
是否需绑卡：无需绑卡
figma.com ↗Penpot永久免费 · 无限（自托管）
免费额度：开源自托管无限；官方云版免费
限制与注意：生态 / 组件库弱于 Figma
是否需绑卡：无需绑卡
penpot.app ↗ClickUp永久免费 · 无限任务
免费额度：无限成员、无限任务
限制与注意：存储仅 100MB（整个工作区合计）
是否需绑卡：无需绑卡
clickup.com ↗Trello永久免费 · 10 个看板
免费额度：无限成员、无限卡片
限制与注意：每工作区仅 10 个看板；自动化 250 次/月
是否需绑卡：无需绑卡
trello.com ↗Linear永久免费 · ≤10 人
免费额度：10 人以内团队免费，含 Issue / 项目 / 基础周期
限制与注意：超出 10 人或需路线图 / 分析即付费
是否需绑卡：无需绑卡
linear.app ↗Asana永久免费 · ~15 人
免费额度：基础版免费，最多 10~15 人（口径随版本）
限制与注意：无甘特图 / 时间线
是否需绑卡：无需绑卡
asana.com ↗HubSpot CRM永久免费 · 无限联系人
免费额度：无限联系人、无限用户，完整 CRM（邮件追踪 / 会议 / 聊天）
限制与注意：营销自动化 / 高级报表付费
是否需绑卡：无需绑卡
hubspot.com ↗Airtable永久免费 · 1000 条/base
免费额度：每 base 1000 条记录；1GB 附件存储
限制与注意：1000 条记录对 CRM / 日历类 3~6 个月就满
是否需绑卡：无需绑卡
airtable.com ↗Bitwarden永久免费 · 无限密码
免费额度：密码管理：无限密码、无限设备同步
限制与注意：基本两步验证付费档；核心功能全免费
是否需绑卡：无需绑卡
bitwarden.com ↗Canva永久免费 · 25 万模板
免费额度：25 万+ 模板，完整编辑器；5GB 存储
限制与注意：抠图 / 品牌套件 / 魔法调尺寸付费
是否需绑卡：无需绑卡
canva.com ↗Loom永久免费 · 25 个视频
免费额度：25 个视频，每个 ≤5 分钟
限制与注意：5 分钟自动截断，异步沟通刚需很快超
是否需绑卡：无需绑卡
loom.com ↗Calendly永久免费 · 1 种类型
免费额度：1 种日程类型
限制与注意：需要第二种会议类型立即付费
是否需绑卡：无需绑卡
calendly.com ↗Excalidraw永久免费 · 无限
免费额度：开源白板 / 画架构图，无限使用
限制与注意：云协作库功能有限
是否需绑卡：无需绑卡
excalidraw.com ↗
🔎 效率 SaaS：先看人数上限，再看隐形天花板
- 团队协作免费档的第一约束是人数：Linear ≤10 人、Asana 约 10~15 人、Trello 与 ClickUp 成员不限——先按团队规模排除
- 文档与设计：Notion 个人版无限 blocks + 无限页面，小团队（≤10 协作者）免费；Figma 免费档只有 3 个设计文件 + 3 个 FigJam 文件、3 个编辑者（查看者不限），团队需提前规划文件复用
- CRM 选 HubSpot：无限联系人 + 无限用户，是免费档里少见的完全不按座位收费的完整 CRM
- 最容易撞墙的三个隐形限制：Airtable 每 base 1000 条记录、Calendly 只有 1 种日程类型、Loom 只有 25 个视频且单个不超过 5 分钟
- 密码与安全：Bitwarden 免费档无限密码 + 无限设备同步，是免费安全工具里性价比最高的一项
- 录屏 + 白板零成本组合：Loom 做轻量录制，Excalidraw 开源白板无限使用
🌐 域名与 DNSdomains & dns
7 项 · 永久免费 3 · 付费 3 · 试用 1 · 免费子域名零成本起步；付费独立域名注册商以红色「付费」标记 · 更新于 2026-09-16
Cloudflare Pages 子域永久免费 · 随项目提供
免费额度：随 Pages 项目自动提供：部署即得 https://.pages.dev，自带 HTTPS；每次预览部署还会生成独立的 ..pages.dev；绑定自有域名只需在 Pages 里加 CNAME
限制与注意：平台子域名，命名受平台规则约束、不可转让；本页这个站就在用（*.pages.dev）
是否需绑卡：无需绑卡
pages.cloudflare.com ↗is-a.dev永久免费 · 免费子域名
免费额度：面向开发者的免费 .is-a.dev 子域名：在 GitHub 仓库提交一个 JSON 配置的 Pull Request（可配 A / AAAA / CNAME / TXT / MX 记录），合并后生效；社区维护、无广告、完全免费
限制与注意：定位为开发者个人主页、开发者团体与非商业开发项目；需提交申请等待审核，不接受纯商业 / 营销站点
是否需绑卡：GitHub PR
www.is-a.dev ↗Porkbun付费 · 按后缀计价
免费额度：首年、续费、转入价格全部公开列在官网价格表，方便横向比较；免费提供 Whois 隐私保护、DNS 管理与邮件转发；支持信用卡 / PayPal
限制与注意：部分后缀首年促销价很低，续费恢复到正常价（例：.xyz $2.04 → $14.21）
是否需绑卡：需付款
porkbun.com ↗Cloudflare Registrar付费 · 成本价
免费额度：按注册局（Registry）与 ICANN 成本价收费，不加价、不搞首年促销陷阱，注册价与续费价基本一致；与你现有的 Cloudflare 站点 / DNS 管理无缝衔接
限制与注意：必须使用 Cloudflare 的权威 DNS；可注册后缀有限，具体价格在搜索域名时才能看到
是否需绑卡：需付款
www.cloudflare.com/products/registrar/ ↗Duck DNS永久免费 · 5 个子域
免费额度：免费动态 DNS：最多 5 个子域名，支持 A / AAAA / TXT / CNAME；提供更新 token 与 HTTP 更新接口，路由器、ddclient、树莓派脚本都能直接对接
限制与注意：动态 DNS 定位，主要解决「公网 IP 会变」；域名为平台所有，不适合正式对外主站
是否需绑卡：无需绑卡
www.duckdns.org ↗GitHub 学生包 · Namecheap试用 · 首年免费
免费额度：GitHub Student Developer Pack 权益：Namecheap 提供 1 个免费 .me 域名首年（含 Whois 隐私保护），学生认证通过后在权益页领取
限制与注意：需符合学生 / 教师认证与领取条件；仅首年免费，续费按 Namecheap 正常价收费
是否需绑卡：学生认证
education.github.com/pack ↗Spaceship付费 · 促销首年价
免费额度：Namecheap 旗下注册商，首年促销力度大、控制台现代简洁，域名搜索与批量管理体验好，常有限时低价活动
限制与注意：首年促销价与续费价差距明显，部分后缀价格波动较大；平台较新，长期政策以官网为准
是否需绑卡：需付款
www.spaceship.com ↗
🔎 域名：免费起步与真实续费成本
- 免费起步有三条路：Cloudflare Pages 自带 <项目名>.pages.dev（部署即得、含 HTTPS）；is-a.dev 通过 GitHub PR 申请，仅限个人主页 / 开发者团体 / 非商业项目；Duck DNS 最多 5 个子域，适合家庭服务器与公网 IP 会变的场景
- 学生身份可再省一年：GitHub 学生包内含 Namecheap 权益，可领 1 个 .me 域名首年免费（含 Whois 隐私），到期按正常价续费
- 付费渠道的价格口径要分清：Cloudflare Registrar 按注册局与 ICANN 成本价收费、不加价；Porkbun 与 Spaceship 首年促销力度大，但续费回到正常价
- 续费价才是真实成本（Porkbun 当前报价 / 美元）：.com $11.08 注册=续费 · .dev $8.75 → 续费 $12.87 · .app $8.75 → $14.93 · .xyz $2.04 → $14.21 · .blog $2.57 → $21.11 · .online $1.96 → $28.84 · .io $28.12 → $51.80
- 三年总成本对比：.xyz 约 $30.46、.com 约 $33.24，差距很小——长期运营首选 .com，技术项目可选 .dev，不要被首年 $2 的促销带走
- 迁移成本提醒：在 Cloudflare Registrar 注册会自动使用 Cloudflare 权威 DNS；若站点 DNS 已在 Cloudflare，管理与续费会集中在一处
Static text version · 71 services / 12 categories · every category carries selection notes · verified 2026-09-16
🧩 A zero-cost indie-dev stack (deliverable in one go)
- Static site / blog: Cloudflare Pages (unlimited bandwidth, commercial OK, with custom domain and SSL) + source on GitHub (public repos have unlimited Actions minutes).
- Full-stack app with auth and DB: Supabase (Postgres 500 MB × 2, Auth 50K MAU, 1 GB storage) or Neon (0.5 GB × 100 projects); layer Clerk / Auth0 free tiers for auth.
- Read-only API / edge logic: Cloudflare Workers (100K req/day) + Cloudflare D1 (5 GB, 5M row reads/day).
- Files and images: images via ImageKit (20 GB bandwidth + 20 GB storage/month), general files via UploadThing (2 GB), backups and large files via Cloudflare R2 (10 GB, zero egress fee).
- Reaching users: transactional email via Resend (3000/mo), newsletter via Brevo (300/day, unlimited contacts).
- Observability after launch: Sentry (5000 errors/mo) + PostHog (1M events/mo) + Checkly (50K checks/mo).
- Team collaboration: Linear (free ≤10 people) or Trello / ClickUp (unlimited members) + Notion (personal plan unlimited blocks) + Bitwarden (unlimited passwords and device sync).
- Coding: OpenCode (Zen gateway free models 50/day + 1000/month) or Cline + Google AI Studio (~1500/day), the whole chain needs no card.
- The one unavoidable cost: a real domain. Per Porkbun's current pricing, .com is about $11.08/yr with registration = renewal price; .xyz is $2.04 first year but $14.21 renewal, not worth it long-term.
⌨️ AI coding & model quotasai coding agents & models
3 items · Free beta 1 · Forever free 2 · Open-source first · BYOK or bundled free quota · updated 2026-09-16
Shanghai AI Lab SciDiscovery · Inkdrop (MoDian) PlanFree beta · Free Inkdrop credits (1 ≈ 20M tokens)
Free quota：Shanghai AI Lab (PJLab) SciDiscovery science-discovery platform's research-model Token Plan: after signing in, claim free 'Inkdrop' credits; 1 Inkdrop ≈ 20M tokens, usable to call the SciDiscovery research models (S2 / S1 / W0 series) and in-platform research services; provides OpenAI-compatible API keys (up to 10 per account).
Limits & notes：Exact quota not published (visible after clicking 'Claim' on the Inkdrop page); limits recover on a rolling 5-hour / 7-day window, with account-wide shared RPM / TPM; aimed at research use, beta policy may change.
Card required：Sign-up required
discovery.intern-ai.org.cn/token-plan/home?tabIndex=0 ↗ClineForever free · Tool free, unlimited
Free quota：Open-source (Apache 2.0) autonomous coding agent, available for VS Code / JetBrains / CLI / Web; the tool itself is free forever, BYOK connects 30+ model providers (OpenRouter, Anthropic, direct DeepSeek, etc.), and local Ollama is fully zero-cost; first 10 seats of the team plan are free.
Limits & notes：The tool is free but tokens are billed via the API (heavy Claude use ≈ $15-40/mo; direct DeepSeek ≈ ¥15-25/mo).
Card required：BYOK
cline.bot ↗OpenCodeForever free · 50/day + 1000/mo
Free quota：Open-source (MIT) terminal-first coding agent (SST team); the Zen gateway bundles free models: 50 requests/day + 1000/month (reset at UTC 0:00, i.e. 8 AM Beijing time), with a rotating pool of free models (DeepSeek V4 Flash Free, MiMo-V2.5 Free, Big Pickle, etc.); BYOK supports 75+ providers.
Limits & notes：Free models are in a feedback-collection period and data may be used for training; rate-limited to about 10 requests/min.
Card required：No card required
opencode.ai ↗
🔎 AI coding quotas: picking and the fine print
- Two proven paths to zero-cost AI coding: OpenCode (terminal form, MIT open source) bundles the Zen gateway free models, 50/day + 1000/month, no card; Cline (Apache 2.0, BYOK) is free forever, cost depends on the API used.
- Quota reset timing: OpenCode Zen resets at UTC midnight, i.e. 8 AM Beijing time; the '50/day' is a hard throttle, good for light daily coding, not for one-off bulk refactors.
- Three tiers of free model APIs: Google AI Studio (~1500/day) has the highest quota; Zhipu Flash is a permanent free tier; local Ollama is fully zero-cost but uses your machine's compute.
- BYOK is not the same as free: pick in order 'API first, then client' — the client only shapes the experience; real cost and quota are set by the API.
- For research: Shanghai AI Lab SciDiscovery 'Inkdrop Plan' hands out free Inkdrop credits during beta, 1 Inkdrop ≈ 20M tokens, suited to papers and scientific computing.
- Verdict: want 'install and use, no card'? pick OpenCode. Want 'full control, swap models anytime'? pick Cline + free API combo.
🎨 Image / voice / videoimage / voice / video
4 items · Forever free 2 · Daily refresh 2 · Tested 2026-08 · re-checked 2026-09-16, mostly web-app free tiers
Google Gemini Image GenForever free · ~100 imgs/day
Free quota：About 100 images/day (no watermark), image generation / editing with the Nano Banana series.
Limits & notes：Rate-limited at peak times; free tier has reduced resolution / speed.
Card required：Google account
gemini.google.com ↗Leonardo AIDaily refresh · 150 tokens/day
Free quota：About 150 tokens/day (refreshes daily), enough to generate dozens of images.
Limits & notes：Web app only; advanced models consume tokens faster.
Card required：No card required
leonardo.ai ↗ElevenLabsForever free · 10K tokens/mo
Free quota：About 10,000 tokens/month for TTS voice synthesis.
Limits & notes：Non-commercial use; attribution required.
Card required：No card required
elevenlabs.io ↗SunoDaily refresh · 50 credits/day
Free quota：About 50 credits/day for music generation.
Limits & notes：Free tier is non-commercial and queue-based.
Card required：No card required
suno.com ↗
🔎 Image / voice / music quotas: how to pair without waste
- Highest image quota is Google Gemini Image Gen: about 100/day, no watermark, the Nano Banana series does generation and editing; Leonardo AI's 150 tokens/day works as a supplement.
- For voice synthesis, ElevenLabs: free tier about 10K tokens/mo, in practice good for demos and short-video dubbing, not bulk long-form production.
- Music via Suno: about 50 credits/day, refreshes daily, good for previews and asset generation.
- Common limits: all the above are web / official-app quotas; commercial licensing and API calls usually bill separately, confirm commercial terms before integrating the API.
- Suggested combo: Gemini for images, ElevenLabs for voice, Suno for music — none need a card, all run in parallel.
🚀 Hosting & computehosting / compute
11 items · Forever free 10 · Trial 1 · Static hosting is mostly free forever; backend PaaS free tiers usually sleep
Cloudflare PagesForever free · Unlimited bandwidth
Free quota：Unlimited bandwidth; 100 sites; 500 builds/month; Pages Functions run on Workers (100K requests/day); custom domains + SSL.
Limits & notes：20,000-file cap per project; commercial use allowed.
Card required：No card required
pages.cloudflare.com ↗RenderForever free · 750 hrs/mo
Free quota：Free static sites (100 GB bandwidth, 750 build minutes); free Web Service (512 MB RAM / 0.1 CPU, 750 hours/month); free Postgres (256 MB) and Redis (25 MB).
Limits & notes：Web Service sleeps after 15 min idle (30-60s cold start); free Postgres data deleted after 30 days inactive.
Card required：No card required
render.com ↗Vercel HobbyForever free · 100GB + 6k min
Free quota：100 GB bandwidth/month; 6000 build minutes/month; 1M function invocations; 1M Edge requests; unlimited personal sites.
Limits & notes：No commercial use (personal non-commercial projects only); adding a second member requires Pro at $20/user/mo.
Card required：No card required
vercel.com ↗NetlifyForever free · 300 credits/mo
Free quota：300 credits/month (credit system: traffic ≈ 20 credits/GB, builds ≈ 15 credits/each), 100 form submissions/month, 125K function calls/month.
Limits & notes：Site pauses when credits run out; tighter than the old 100 GB bandwidth plan.
Card required：No card required
netlify.com ↗GitHub PagesForever free · 100GB bandwidth
Free quota：100 GB bandwidth/month (soft limit); 1 GB per repo; 1 site per account + 1 per repo.
Limits & notes：Static sites only; automatic Jekyll builds.
Card required：No card required
pages.github.com ↗Cloudflare WorkersForever free · 100K req/day
Free quota：100K requests/day; 10 ms CPU/request; unlimited deployments; zero cold start at the edge.
Limits & notes：Strict CPU-time limit; KV / D1 / R2 each have separate quotas.
Card required：No card required
workers.cloudflare.com ↗Deno DeployForever free · 100GB egress
Free quota：100 GB egress/month; 15 CPU hours/month; 100K requests/day; unlimited sites.
Limits & notes：Deno / Web Standard APIs only.
Card required：No card required
deno.com ↗KoyebForever free · 1 instance + PG
Free quota：1 free Web Service (1 vCPU / 512 MB RAM) + free Postgres (scale-to-zero).
Limits & notes：Only 1 free instance; specs may change across versions.
Card required：No card required
koyeb.com ↗RailwayTrial · $5 trial
Free quota：$5 one-time trial credit (30 days), 1 project with 3 services.
Limits & notes：Trial-based, not permanent; afterwards a minimum of $1/mo.
Card required：No card required
railway.com ↗Val TownForever free · 50 vals
Free quota：50 vals, with 1 cron job per hour.
Limits & notes：Lightweight scripts / webhook scenarios.
Card required：No card required
val.town ↗Surge.shForever free · Unlimited sites
Free quota：Unlimited static site deployments, one command to publish.
Limits & notes：Static only.
Card required：No card required
surge.sh ↗
🔎 Hosting and compute: the real edges of the free tier
- Cloudflare Pages for static sites: unlimited bandwidth, commercial OK, with custom domain and SSL; Vercel Hobby is also free forever but explicitly bans commercial use, don't cross the line on commercial projects.
- Common free-PaaS risk is sleep: Render free Web Service sleeps after 15 min idle, 30-60s cold start, not for latency-sensitive services.
- Quotas shift, old-tutorial numbers are stale: Netlify moved from '100 GB bandwidth' to a '300 credits/month' credit system (≈20 credits/GB traffic, ≈15 credits/build).
- Edge-function free-tier comparison: Cloudflare Workers 100K req/day (10 ms CPU/req) and Deno Deploy 100K req/day + 100 GB egress are roughly comparable.
- Want a persistent stateful service: Koyeb gives 1 Web Service instance (1 vCPU / 512 MB) + free Postgres, good for small always-on APIs.
- Combo suggestion: frontend Cloudflare Pages + edge logic Workers + cron jobs Val Town — all free and none need a card.
🗄️ Databasesdatabases
12 items · Forever free 12 · Relational / KV / edge DBs; RU = request-unit metering
SupabaseForever free · 500MB × 2
Free quota：Postgres 500 MB × 2 active projects; Auth 50K MAU; 1 GB file storage; 500K Edge Function invocations/month; unlimited API calls.
Limits & notes：Projects pause after 1 week idle (recoverable from the dashboard, data not deleted); no automatic backups.
Card required：No card required
supabase.com ↗NeonForever free · 0.5GB × 100
Free quota：0.5 GB per project × 100 projects; 100 compute-unit hours/project/month; 10 branches/project; scale-to-zero without pausing the project.
Limits & notes：Compute scales to zero after 5 min idle (0.5-1s cold start).
Card required：No card required
neon.tech ↗Cloudflare D1Forever free · 5GB / 5M row reads
Free quota：SQLite edge database: 5 GB storage; 5M row reads/day + 100K row writes/day.
Limits & notes：Accessible only from inside Workers; metered by row.
Card required：No card required
developers.cloudflare.com ↗TiDB Cloud StarterForever free · 25 GiB + 250M RU
Free quota：MySQL-compatible distributed DB (formerly Serverless, renamed Starter in 2025-08): 5 GiB row store + 5 GiB column store + 50M RU/month per instance; up to 5 free instances per org (25 GiB row store + 250M RU/month total); includes HTAP and vector search.
Limits & notes：Read/write throttled after quota until next-month reset; connections forced to TLS; usernames must carry the instance prefix.
Card required：No card required
tidbcloud.com ↗TursoForever free · 5GB + 500M row reads
Free quota：SQLite (libSQL): 5 GB total storage; 500M row reads/mo + 10M row writes/mo; 100 databases.
Limits & notes：Database only (no Auth / storage / functions).
Card required：No card required
turso.tech ↗MongoDB AtlasForever free · 512MB
Free quota：M0 cluster 512 MB, free forever (choose AWS / Azure / GCP).
Limits & notes：Shared memory / CPU, throttled above 100 ops/s; 500 concurrent connections.
Card required：Card required
mongodb.com ↗Upstash RedisForever free · 256MB / 500K cmds
Free quota：Redis 256 MB; 500K commands/month; 10 GB bandwidth (separate free Kafka tier available).
Limits & notes：1 free database; throttled once the quota is hit.
Card required：No card required
upstash.com ↗CockroachDBForever free · 10 GiB
Free quota：Distributed SQL: 10 GiB storage; 50M request units/month.
Limits & notes：Metered by Request Units.
Card required：Card required
cockroachlabs.com ↗Prisma PostgresForever free · 500MB × 50
Free quota：500 MB × up to 50 databases; 100K Prisma operations/month.
Limits & notes：Metered by Prisma operation count.
Card required：No card required
prisma.dev ↗ConvexForever free · 1M calls/mo
Free quota：0.5 GB storage; 1M function calls/month.
Limits & notes：Backend-as-a-service model, not a bare database.
Card required：No card required
convex.dev ↗NileForever free · 1GB
Free quota：Multi-tenant Postgres: 1 GB; 50M query tokens/month.
Limits & notes：New platform, metered by 'query token'.
Card required：No card required
thenile.dev ↗Cloud FirestoreForever free · 50K reads/day
Free quota：1 GiB storage; 50K reads/day + 20K writes/day; Realtime DB 1 GB + 10 GB downloads/month.
Limits & notes：Daily quota resets at midnight Pacific Time.
Card required：Google account
firebase.google.com ↗
🔎 Databases: pick by free storage quota
- Free storage, largest to smallest: TiDB Cloud Starter 25 GiB > CockroachDB 10 GiB > Turso 5 GB ≈ Cloudflare D1 5 GB > Nile 1 GB > Supabase / Neon / Prisma Postgres (500 MB class) > MongoDB Atlas 512 MB > Upstash Redis 256 MB.
- Match by scenario: full-stack all-in-one → Supabase; multi-project and Serverless → Neon; edge and high reads → Turso or Cloudflare D1; MySQL-compatible with the biggest quota → TiDB Cloud Starter.
- 'Pause' and 'sleep' are not the same: Supabase free projects pause after 1 week idle (data kept, manual restore); Neon is scale-to-zero sleep, compute hits zero after 5 min idle, 0.5-1s cold start; Turso and D1 have no project-level pause concept.
- KV / cache scenarios: Upstash Redis 256 MB + 500K commands/mo, good for rate limiting, sessions and light queues, not as a primary DB.
- Card or not: MongoDB Atlas and CockroachDB free tiers need a card, most others don't — avoid these two if you won't bind a card.
- Anti-lock-in principle: only standard engines (Postgres / MySQL / SQLite compatible), so pg_dump / mysqldump can migrate you out anytime, avoid vendor-specific extensions.
🚀 Dev & deploydev & deploy
2 items · Forever free 2 · Code hosting / CI / cloud infra
GitHubForever free · 2k min/mo
Free quota：Unlimited public + private repos; Actions 2000 min/month (private repos, unlimited for public); Copilot free tier (limited completions/month); Codespaces free core-hours/month.
Limits & notes：Actions minutes weighted by OS (Windows 2×, macOS 10×).
Card required：No card required
github.com ↗Cloudflare SuiteForever free · CDN+R2 10GB
Free quota：CDN / DNS free forever (unlimited traffic, DDoS protection); R2 object storage 10 GB + 10M operations/month (zero egress fee); KV 100K reads/day; Workers 100K requests/day; Tunnel for private-network ingress free.
Limits & notes：R2 free tier requires a card; 10 ms CPU per request.
Card required：Card required for R2
cloudflare.com ↗
🔎 Code hosting and cloud infra: stacking free quotas
- GitHub free tier is most open-source friendly: public repos have unlimited Actions minutes, private repos 2000 min/month; Copilot has its own separate free tier.
- Cloudflare Suite covers the most of any 'free infra' vendor: CDN / DNS unlimited traffic with DDoS protection, R2 object storage 10 GB + 10M ops/month, KV 100K reads/day.
- R2's differentiator is zero egress fee: swapping in for S3 on static assets and backups saves real money; the cost is a required card.
- Combo suggestion: code on GitHub, static assets on R2 or Pages, edge logic on Workers — their free quotas don't conflict and stack together.
📧 Email servicesemail apis
3 items · Forever free 3 · Transactional / marketing email
ResendForever free · 3000/mo
Free quota：Transactional email 3000/month (100/day); 1 custom domain.
Limits & notes：Stops when over quota; 1000 marketing contacts.
Card required：No card required
resend.com ↗BrevoForever free · 300/day
Free quota：Email 300/day (about 9000/month), unlimited contacts.
Limits & notes：Daily quota system.
Card required：No card required
brevo.com ↗PostmarkForever free · 100/mo
Free quota：Transactional email 100/month.
Limits & notes：Small quota, suited for critical transactional email.
Card required：No card required
postmarkapp.com ↗
🔎 Email services: split transactional vs newsletter
- Transactional email (OTP, order notices) → Resend first: 3000/mo (100/day) and no card; Postmark only 100/mo, tight but well-regarded deliverability.
- Newsletter and contact management → Brevo: 300/day (about 9000/mo), unlimited contacts, good for early subscription content.
- Common pitfall: free tiers usually allow only 1 custom domain and require SPF / DKIM; without it, mail lands in spam.
- Combo suggestion: transactional via Resend, newsletter via Brevo, keep the two free quotas separate so a spike in one doesn't crowd out the other.
🔐 Authenticationauthentication
3 items · Forever free 3 · MAU = monthly active users
ClerkForever free · 10K MAU
Free quota：Auth: 10K MAU (some say 50K retained users/month, varies by version).
Limits & notes：Beyond that, from $25/mo.
Card required：No card required
clerk.com ↗Auth0Forever free · 25K MAU
Free quota：Auth: 25K MAU; unlimited social logins; 1 enterprise connection.
Limits & notes：No advanced features on the free tier.
Card required：No card required
auth0.com ↗LogtoForever free · 5000 MAU
Free quota：Cloud tier 5000 MAU; open-source self-hosted is unlimited.
Limits & notes：Requires self-hosting and operations.
Card required：No card required
logto.io ↗
🔎 Auth: MAU quota comparison and the self-host escape hatch
- Free quota ranking: Auth0 25K MAU > Clerk 10K MAU (some versions say 50K retained users/mo) > Logto cloud 5000 MAU.
- Self-host bypasses the cap: Logto open-source self-hosted has no MAU limit, at the cost of maintaining the DB and upgrades yourself.
- Enterprise features get overlooked: social logins are unlimited on Auth0 free, but enterprise connections (SAML / SSO) give only 1; plan ahead for B2B.
- Pick by need: consumer-facing and fast integration → Clerk; compliance and multi-protocol → Auth0; full cost control and able to self-operate → Logto self-hosted.
📈 Monitoring & analyticsmonitoring & analytics
8 items · Forever free 8 · Error monitoring / product & traffic analytics / LLM observability
SentryForever free · 5k errors/mo
Free quota：Error monitoring 5000 errors/month; tracing 5M spans/month; session replay 50/month; 1 cron monitor.
Limits & notes：1 member seat only; 30-day data retention.
Card required：No card required
sentry.io ↗PostHogForever free · 1M events/mo
Free quota：Product analytics 1M events/month; session replay 5000/month; feature flags 1M requests/month.
Limits & notes：Self-hosted is unlimited.
Card required：No card required
posthog.com ↗ChecklyForever free · 50K runs/mo
Free quota：Monitoring / E2E: 50K check runs/month.
Card required：No card required
checklyhq.com ↗LangfuseForever free · 50K units/mo
Free quota：LLM observability: 50K units/month; 2 users.
Limits & notes：30-day data retention; open-source self-hosted is unlimited.
Card required：No card required
langfuse.com ↗HeliconeForever free · 10K req/mo
Free quota：LLM gateway logs 10K requests/month; 1 GB storage.
Limits & notes：7-day retention; write rate limit 10 entries/min.
Card required：No card required
helicone.ai ↗BraintrustForever free · 10K scores/mo
Free quota：LLM evaluation: 10K scores/month; $10 free credit.
Limits & notes：14-day retention.
Card required：No card required
braintrust.dev ↗Umami / PlausibleForever free · Unlimited (self-host)
Free quota：Open-source privacy analytics, fully free and unlimited when self-hosted.
Limits & notes：Requires self-deployment (Render / CF Pages both work).
Card required：No card required
umami.is ↗Google AnalyticsForever free · Unlimited
Free quota：Completely free, unlimited traffic analytics.
Limits & notes：Data-privacy / granularity concerns (GA4 has a learning curve).
Card required：Google account
analytics.google.com ↗
🔎 Monitoring and analytics: the free-tier trio
- Error monitoring → Sentry: 5000 errors/mo + 5M spans/mo + 50 session replays, no card, the most complete free tier.
- Product analytics → PostHog: 1M events/mo + 5000 session replays + 1M feature-flag requests, event quota clearly above peers.
- LLM observability is its own trio: Langfuse (50K units/mo) for tracing, Helicone (10K req/mo) for gateway logs, Braintrust (10K scores/mo, plus $10 credit) for evaluation.
- Privacy-first → Umami / Plausible self-hosted: fully free, unlimited, no personal data collected; if you won't self-host, use Google Analytics (unlimited free, trading data for service).
- Combo suggestion: before launch use Checkly (50K checks/mo) for uptime probes, after launch wire Sentry to errors and PostHog to behavior, add Langfuse if you have LLM features.
💬 Community & collaborationcommunity
2 items · Forever free 2 · Team and community communication
DiscordForever free · Full-feature free
Free quota：Completely free: unlimited members (500K cap per server), unlimited message history (Slack free tier keeps only 90 days), voice / video / screen share, 500 channels/server, full bot ecosystem.
Limits & notes：Free-tier upload ≈ 10 MB; streaming 720p/30fps; Nitro ($2.99+) is personal enhancement, not required.
Card required：No card required
discord.com ↗SlackForever free · 90-day history
Free quota：Unlimited channels, unlimited members.
Limits & notes：Message history only 90 days; 10 integrations; 1:1 calls only.
Card required：No card required
slack.com ↗
🔎 Community collaboration: where free tiers differ most
- Message history is the divide: Slack free keeps only 90 days (channels and members unlimited), Discord is fully free with unlimited history.
- Tech communities and OSS projects → Discord first: 500K member cap per server, 500 channels per server, voice / video / screen share and bot ecosystem all free.
- If you must use Slack (enterprise integration or existing workflow), persist key conclusions to external docs so pre-90-day discussions don't become unsearchable.
📦 Miscmisc
2 items · Forever free 2 · File / media infrastructure
UploadThingForever free · 2GB storage
Free quota：File uploads 2 GB storage, unlimited uploads.
Limits & notes：React / Next.js ecosystem first.
Card required：No card required
uploadthing.com ↗ImageKitForever free · 20GB × 2
Free quota：Image CDN / optimization: 20 GB bandwidth + 20 GB storage/month.
Limits & notes：Advanced transformations are paid.
Card required：No card required
imagekit.io ↗
🔎 File and media infra: two-piece stack
- General file uploads → UploadThing: 2 GB storage, unlimited uploads, good for prototypes and mid-size projects.
- Image CDN and live optimization → ImageKit: 20 GB bandwidth + 20 GB storage/month, with cropping, format conversion and global acceleration.
- Combo suggestion: images via ImageKit for optimization and delivery, other files via UploadThing; the two free quotas stack independently.
📊 Productivity SaaSproductivity saas
14 items · Forever free 14 · Flags the most easily missed 'real limits'
NotionForever free · Unlimited blocks
Free quota：Personal plan unlimited blocks + unlimited pages; small teams free (≤10 collaborators).
Limits & notes：Version history only 7 days; single-file upload 5 MB; no page analytics.
Card required：No card required
notion.so ↗FigmaForever free · 3 + 3 files
Free quota：3 design files + 3 FigJam files; unlimited viewers; 3 collaborative editors.
Limits & notes：3-file cap (hits a wall quickly as projects grow); no version history.
Card required：No card required
figma.com ↗PenpotForever free · Unlimited (self-host)
Free quota：Open-source self-hosted unlimited; official cloud tier free.
Limits & notes：Ecosystem / component libraries weaker than Figma.
Card required：No card required
penpot.app ↗ClickUpForever free · Unlimited tasks
Free quota：Unlimited members, unlimited tasks.
Limits & notes：Only 100 MB storage (total for the whole workspace).
Card required：No card required
clickup.com ↗TrelloForever free · 10 boards
Free quota：Unlimited members, unlimited cards.
Limits & notes：Only 10 boards per workspace; 250 automations/month.
Card required：No card required
trello.com ↗LinearForever free · ≤10 people
Free quota：Free for teams up to 10 people, including Issues / projects / basic cycles.
Limits & notes：Beyond 10 people or for roadmaps / analytics requires paid.
Card required：No card required
linear.app ↗AsanaForever free · ~15 people
Free quota：Basic plan free, up to 10-15 people (varies by version).
Limits & notes：No Gantt chart / timeline.
Card required：No card required
asana.com ↗HubSpot CRMForever free · Unlimited contacts
Free quota：Unlimited contacts, unlimited users, full CRM (email tracking / meetings / chat).
Limits & notes：Marketing automation / advanced reporting are paid.
Card required：No card required
hubspot.com ↗AirtableForever free · 1000 records/base
Free quota：1000 records per base; 1 GB attachment storage.
Limits & notes：1000 records fills up in 3-6 months for CRM / calendar use.
Card required：No card required
airtable.com ↗BitwardenForever free · Unlimited passwords
Free quota：Password manager: unlimited passwords, unlimited device sync.
Limits & notes：Basic 2FA is a paid tier; core features fully free.
Card required：No card required
bitwarden.com ↗CanvaForever free · 250K templates
Free quota：250K+ templates, full editor; 5 GB storage.
Limits & notes：Background removal / brand kit / magic resize are paid.
Card required：No card required
canva.com ↗LoomForever free · 25 videos
Free quota：25 videos, each ≤5 minutes.
Limits & notes：Auto-cut at 5 minutes; async-comm need fills up fast.
Card required：No card required
loom.com ↗CalendlyForever free · 1 type
Free quota：1 scheduling type.
Limits & notes：Needing a second meeting type immediately requires paid.
Card required：No card required
calendly.com ↗ExcalidrawForever free · Unlimited
Free quota：Open-source whiteboard / architecture diagrams, unlimited use.
Limits & notes：Cloud collaboration library features are limited.
Card required：No card required
excalidraw.com ↗
🔎 Productivity SaaS: headcount cap first, then hidden ceilings
- The first constraint on team free tiers is headcount: Linear ≤10, Asana about 10-15, Trello and ClickUp unlimited members — filter by team size first.
- Docs and design: Notion personal has unlimited blocks + pages, free for small teams (≤10 collaborators); Figma free has only 3 design files + 3 FigJam files, 3 editors (viewers unlimited), so teams must plan file reuse ahead.
- CRM → HubSpot: unlimited contacts + unlimited users, a rare complete CRM on the free tier that doesn't charge per seat.
- Three hidden limits you'll hit first: Airtable 1000 records/base, Calendly only 1 scheduling type, Loom only 25 videos each ≤5 min.
- Passwords and security: Bitwarden free has unlimited passwords + unlimited device sync, the best-value free security tool.
- Zero-cost screen-rec + whiteboard combo: Loom for light recording, Excalidraw open-source whiteboard unlimited.
🌐 Domains & DNSdomains & dns
7 items · Forever free 3 · Paid 3 · Trial 1 · Free subdomains start at zero cost; paid registrars marked red 'Paid' · updated 2026-09-16
Cloudflare Pages subdomainForever free · Provided with project
Free quota：Auto-provided with Pages projects: deploy and get https://.pages.dev with HTTPS; each preview deploy also generates a separate ..pages.dev; binding your own domain only needs a CNAME in Pages.
Limits & notes：A platform subdomain, naming is bound by platform rules and not transferable; this very site uses one (*.pages.dev).
Card required：No card required
pages.cloudflare.com ↗is-a.devForever free · Free subdomain
Free quota：Free .is-a.dev subdomain for developers: submit a JSON-config Pull Request in a GitHub repo (supports A / AAAA / CNAME / TXT / MX records), takes effect after merge; community-maintained, ad-free, completely free.
Limits & notes：Positioned for developer personal pages, developer groups and non-commercial dev projects; requires submitting a request and waiting for review, no purely commercial / marketing sites.
Card required：GitHub PR
www.is-a.dev ↗PorkbunPaid · Priced per TLD
Free quota：First-year, renewal, and transfer prices are all listed openly on the pricing page for easy comparison; free Whois privacy, DNS management and email forwarding; supports credit card / PayPal.
Limits & notes：Some TLDs have very low first-year promo prices, renewing at normal price (e.g. .xyz $2.04 → $14.21).
Card required：Payment required
porkbun.com ↗Cloudflare RegistrarPaid · Cost price
Free quota：Charges at registry and ICANN cost price, no markup, no first-year promo traps, registration and renewal prices are basically the same; seamlessly integrates with your existing Cloudflare sites / DNS management.
Limits & notes：Must use Cloudflare's authoritative DNS; limited TLDs available, exact prices shown when searching a domain.
Card required：Payment required
www.cloudflare.com/products/registrar/ ↗Duck DNSForever free · 5 subdomains
Free quota：Free dynamic DNS: up to 5 subdomains, supports A / AAAA / TXT / CNAME; provides an update token and HTTP update API, directly usable from routers, ddclient, and Raspberry Pi scripts.
Limits & notes：Dynamic-DNS positioning, mainly solves 'public IP changes'; domain is platform-owned, not suited as a formal public-facing main site.
Card required：No card required
www.duckdns.org ↗GitHub Student Pack · NamecheapTrial · First year free
Free quota：GitHub Student Developer Pack perk: Namecheap offers 1 free .me domain for the first year (with Whois privacy), claimed on the benefits page after student verification.
Limits & notes：Requires meeting student / teacher verification and claim conditions; only the first year is free, renewal at Namecheap's normal price.
Card required：Student verification
education.github.com/pack ↗SpaceshipPaid · Promo first-year price
Free quota：A Namecheap-owned registrar with strong first-year promos, a modern clean console, good domain-search and bulk-management UX, and frequent limited-time low-price campaigns.
Limits & notes：Clear gap between first-year promo and renewal prices, some TLDs fluctuate more; platform is newer, long-term policy per official site.
Card required：Payment required
www.spaceship.com ↗
🔎 Domains: free start and the real renewal cost
- Three free-start paths: Cloudflare Pages ships <project-name>.pages.dev (deploy and get it, with HTTPS); is-a.dev via a GitHub PR, limited to personal pages / dev groups / non-commercial projects; Duck DNS up to 5 subdomains, good for home servers and changing public IPs.
- Students save another year: the GitHub Student Pack includes a Namecheap perk, claim 1 free first-year .me domain (with Whois privacy), renew at normal price after.
- Know the paid-channel price models: Cloudflare Registrar charges registry + ICANN cost, no markup; Porkbun and Spaceship have big first-year promos but renew at normal price.
- Renewal price is the real cost (Porkbun current prices / USD): .com $11.08 reg=renewal · .dev $8.75 → renewal $12.87 · .app $8.75 → $14.93 · .xyz $2.04 → $14.21 · .blog $2.57 → $21.11 · .online $1.96 → $28.84 · .io $28.12 → $51.80
- 3-year total-cost comparison: .xyz ≈ $30.46, .com ≈ $33.24, the gap is tiny — for the long run pick .com, tech projects can use .dev, don't be lured by the $2 first-year promo.
- Migration-cost note: registering at Cloudflare Registrar auto-uses Cloudflare authoritative DNS; if your site DNS is already on Cloudflare, management and renewal consolidate in one place.