# 4 Best Open-Source Alternatives to Firebase in 2026

By Noah — last updated & pricing verified September 15, 2026.

> 4 of the 6 Firebase alternatives we list qualify for this filter. The [full list](https://findalternative.to/firebase) is the canonical page.

| Alternative | Best for | Price | Details |
| --- | --- | --- | --- |
| Supabase | developers who want a Postgres-based backend (auth, storage, realtime, auto-generated APIs) they can self-host later, rather than committing to a proprietary NoSQL platform like Firebase | Free tier · paid from $25/mo | https://findalternative.to/supabase/about |
| Appwrite | developer teams building web, mobile, or Flutter apps that want a Firebase-style backend (auth, database, storage, functions) they can self-host for free instead of relying solely on a vendor's cloud | Free tier · paid from $25/mo | https://findalternative.to/appwrite/about |
| PocketBase | developers who want a single-binary backend (database, auth, storage, realtime API) for a side project or small-to-medium app without assembling separate services | Free | https://findalternative.to/pocketbase/about |
| Convex | developers and small teams building AI agents or real-time web apps who want a database, functions, and search layer in one TypeScript-native system instead of assembling separate services | Free tier · paid from $25/mo | https://findalternative.to/convex/about |

All 6 alternatives to Firebase: https://findalternative.to/firebase

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Markdown mirror of https://findalternative.to/firebase/open-source — findalternative.to, honestly ranked software alternatives. AI info: https://findalternative.to/ai