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Backend

Free Firebase alternatives

Firebase (Google's platform to build and run apps) is a commercial product. These 3 tools do the same job and are free to use or to self-host.
Short answer: the best free alternatives to Firebase are Supabase, Appwrite and PocketBase. Firebase is priced by usage. Self-hosting is free; you pay only for the server (a small VPS is about $4–6/mo). Licenses and prices checked 2026-10-01.
  1. 1
    Supabase

    Open-source Postgres development platform

    Postgres backend with auth, storage and realtime; self-hostable.

    Open source (Apache-2.0) ·details

  2. 2
    Appwrite

    Open-source backend for web and mobile apps

    Backend server for web and mobile apps.

    Open source (BSD-3-Clause) ·details

  3. 3
    PocketBase

    Open-source backend in one file

    Backend in one Go binary with SQLite.

    Open source (MIT) ·details

Want paid options too? See all Firebase alternatives or the full free alternatives list.

FAQ

Is there a free alternative to Firebase?+

Yes. Supabase, Appwrite and PocketBase do the same job for free; Supabase, Appwrite and PocketBase are open source.

What is the best open-source alternative to Firebase?+

Supabase, Appwrite and PocketBase are open source. Supabase: Postgres backend with auth, storage and realtime; self-hostable.

Open source: OSI-approved license. Free to self-host: the code is public and free to run yourself, with limits in the license.