# 后端即服务 (BaaS) (BaaS)

> 托管数据库、认证、存储一体化的后端服务,如 Supabase、Firebase。
> 共 21 个免费服务。数据来源:https://github.com/ripienaar/free-for-dev(MIT)。更新时间:2026-09-10

- [Activepieces](https://www.activepieces.com) — Build automation flows to connect several apps together in your app's backend. For example, send a Slack message or add a Google Sheet row when an event fires in your app. Free up to 5,000 tasks per month.
- [back4app.com](https://www.back4app.com) — Back4App is an easy-to-use, flexible and scalable backend based on Parse Platform.
- [backendless.com](https://backendless.com/) — Mobile and Web Baas, with 1 GB file storage free, push notifications of 50,000/month, and 1000 data objects in the table.
- [connectycube.com](https://connectycube.com) — Unlimited chat messages, p2p voice & video calls, files attachments and push notifications. Free for apps up to 1000 users.
- [convex.dev](https://convex.dev/) — Reactive backend as a service, hosting your data (documents with relationships & serializable ACID transactions), serverless functions, and WebSockets to stream updates to various clients. Free for small projects - up to 1M records, 5M monthly function calls.
- [ETLR](https://etlr.io) — Define, version, and deploy automation scripts using YAML. A developer-first alternative to drag-and-drop tools. Can be used for scheduled tasks, AI agents, and infrastructure monitoring. Free tier includes 100 credits/month.
- [Flutter Flow](https://flutterflow.io) — Build your Flutter App UI without writing a single line of code. Also has a Firebase integration. The free plan includes full access to UI Builder and Free templates.
- [getstream.io](https://getstream.io/) — Build scalable In-App Chat, Messaging, Video and audio, and Feeds in a few hours instead of weeks
- [IFTTT](https://ifttt.com) — Automate your favorite apps and devices. Free 2 Applets
- [Integrately](https://integrately.com) — Automate tedious tasks with a single click. Free 100 Tasks, 15 Minute
- [LeanCloud](https://leancloud.app/) — Mobile backend. 1GB of data storage, 256MB instance, 3K API requests/day, and 10K pushes/day are free. (API is very similar to Parse Platform)
- [nhost.io](https://nhost.io) — Serverless backend for web and mobile apps. The free plan includes PostgreSQL, GraphQL (Hasura), Authentication, Storage, and Serverless Functions.
- [onesignal.com](https://onesignal.com/) — Unlimited free push notifications. 10,000 email sends per month, with unlimited contacts and access to Auto Warm Up.
- [paraio.com](https://paraio.com) — Backend service API with flexible authentication, full-text search and caching. Free for one app, 1GB of app data.
- [pubnub.com](https://www.pubnub.com/) — Free push notifications for up to 1 million messages/month and 100 active daily devices
- [pusher.com](https://pusher.com/beams) — Free, unlimited push notifications for 2000 monthly active users. A single API for iOS and Android devices.
- [simperium.com](https://simperium.com/) — Move data everywhere instantly and automatically, multi-platform, unlimited sending and storage of structured data, max. 2,500 users/month
- [snill.ai](https://snill.ai) — AI no-code platform that turns a plain-language description into a complete business system with a relational database, dashboards, workflows, REST API and webhooks. Free plan for solo operators includes 2 apps, 1,000 records and 10 AI requests/day.
- [Supabase](https://supabase.com) — The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage.
- [tyk.io](https://tyk.io/) — API management with authentication, quotas, monitoring and analytics. Free cloud offering
- [zapier.com](https://zapier.com/) — Connect the apps you use to automate tasks. Five zaps every 15 minutes and 100 tasks/month Update Time, five active automations, webhooks.