# Alternatives to Firebase

Firebase is Google's app-development platform offering a backend-as-a-service: the Firestore and Realtime Database, Authentication, Cloud Storage, Cloud Functions, hosting, and client SDKs for web, iOS, and Android, on a managed pay-as-you-go cloud.

Firebase ranks #7 of 10 in Backend-as-a-service, with an Alt Score of 81. It is proprietary, freemium from Pay-as-you-go (Blaze plan); free Spark tier available and available on Web, iOS and Android. 12 of 12 checklist rows are verified against a public source.

Source: https://altcatalog.com/alternatives/firebase/
Category: Backend-as-a-service

## Overview

- **Who it's for**: Mobile and web app developers who want a fully managed Google Cloud backend—database, auth, storage, and functions—without standing up or operating their own servers.
- **What you get**: A NoSQL database (Firestore and Realtime Database), Firebase Authentication, Cloud Storage for files, serverless Cloud Functions, static/full-stack Hosting, and AI features via Firestore vector search and Firebase AI Logic (Gemini access), all reachable through official iOS, Android, and Web client SDKs.
- **How it works**: You add a platform SDK to your app and connect directly to Firebase's managed services; Firebase Security Rules enforce granular, server-side access control on the database and storage instead of application server code, and Cloud Functions run backend logic in response to events. Usage is free on the Spark plan up to generous limits, then billed pay-as-you-go on the Blaze plan.

## Profile

- **License**: Proprietary (verified 2026-07-13)
- **Pricing model**: Freemium (verified 2026-07-13)
- **Starts at**: Pay-as-you-go (Blaze plan); free Spark tier available (verified 2026-07-13)
- **Platforms**: Web, iOS, Android
- **Status**: active (verified 2026-07-13)

## Ranked alternatives

| # | App | Alt Score | Licence | Platforms |
|---|-----|-----------|---------|-----------|
| 1 | [Supabase](https://altcatalog.com/alternatives/supabase.md) | 100 | Apache License 2.0 | Web |
| 2 | [Appwrite](https://altcatalog.com/alternatives/appwrite.md) | 96 | BSD-3-Clause | Windows, macOS, Linux, Web |
| 3 | [AWS Amplify](https://altcatalog.com/alternatives/aws-amplify.md) | 93 | Apache-2.0 | Web, iOS, Android |
| 4 | [Convex](https://altcatalog.com/alternatives/convex.md) | 89 | FSL-1.1-Apache-2.0 | Web, Linux |
| 5 | [InstantDB](https://altcatalog.com/alternatives/instantdb.md) | 85 | Apache-2.0 | Web, iOS, Android |
| 6 | [Back4app](https://altcatalog.com/alternatives/back4app.md) | 81 | ? | Web, iOS, Android |
| 7 | [Parse Platform](https://altcatalog.com/alternatives/parse-platform.md) | 81 | Apache-2.0 | iOS, macOS, Android, Web |
| 8 | [Xano](https://altcatalog.com/alternatives/xano.md) | 81 | Proprietary | ? |
| 9 | [PocketBase](https://altcatalog.com/alternatives/pocketbase.md) | 78 | MIT License | Linux, Windows, macOS, Web |

Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/

## Feature comparison

Legend: Yes / No / Partial / ? (not verified).

| Backend-as-a-service checklist | Firebase | Supabase | Appwrite | AWS Amplify | Convex | InstantDB |
|---|---|---|---|---|---|---|
| Pricing model | Freemium | OSS + paid hosting | OSS + paid hosting | Usage-based | Freemium | Freemium |
| Starts at | Pay-as-you-go (Blaze plan); free Spark tier available | $25/mo (Pro) | $25/mo | Free | $25/developer/month | $30/mo |
| License | Proprietary | Apache License 2.0 | BSD-3-Clause | Apache-2.0 | FSL-1.1-Apache-2.0 | Apache-2.0 |
| Platforms | Web, iOS, Android | Web | Windows, macOS, Linux, Web | Web, iOS, Android | Web, Linux | Web, iOS, Android |
| Managed database | Yes | Yes | Yes | Yes | Yes | Yes |
| Auth built in | Yes | Yes | Yes | Yes | Partial | Yes |
| File / object storage | Yes | Yes | Yes | Yes | Yes | Yes |
| Realtime subscriptions | Yes | Yes | Yes | Yes | Yes | Yes |
| Serverless / edge functions | Yes | Yes | Yes | Yes | Yes | No |
| Auto-generated APIs | Partial | Yes | Yes | Yes | Yes | Yes |
| Self-hostable | No | Yes | Yes | No | Yes | Yes |
| Open source | Partial | Yes | Yes | Yes | Yes | Yes |
| Client SDKs | Yes | Yes | Yes | Yes | Yes | Yes |
| Row-level security | Partial | Yes | Yes | Yes | No | Yes |
| Vector / AI support | Yes | Yes | Partial | Yes | Yes | No |
| Free tier | Yes | Yes | Yes | Yes | Yes | Yes |

## Sources

Sources for Firebase. Each alternative is sourced on its own page.

- **License**: Proprietary — <https://firebase.google.com/terms> (verified 2026-07-13)
  - Note: Firebase is a proprietary, closed hosted platform governed by Google's Terms of Service (Firebase services are also subject to the Google Cloud Platform Terms of Service, per the same page). Some clie
  - Quote: “Terms of Service for Firebase Services”
- **Pricing model**: Freemium — <https://firebase.google.com/pricing> (verified 2026-07-13)
  - Note: Free Spark plan (no-cost usage limits, no payment method needed) plus a pay-as-you-go Blaze plan for higher usage; page also shows 'Pay as you go (Blaze plan)' as the paid tier.
  - Quote: “No-cost (Spark plan)”
- **Starts at**: Pay-as-you-go (Blaze plan); free Spark tier available — <https://firebase.google.com/pricing> (verified 2026-07-13)
  - Note: No flat starting price is stated; Blaze charges are usage-based per product (e.g. Firestore, Storage, Functions each billed separately) with a no-cost Spark tier included.
  - Quote: “Pay as you go (Blaze plan)”
- **Platforms**: Web, iOS, Android — <https://firebase.google.com/docs/libraries> (verified 2026-07-13)
  - Note: Firebase also ships official SDKs for Flutter, C++, and Unity per the same page, but the platform categories captured here are limited to Web, iOS, Android.
  - Quote: “Add Firebase - Apple platforms (iOS+) Add Firebase - Android Add Firebase - Web Add Firebase - Flutter Add Firebase - C++ Add Firebase - Unity”
- **Status**: active — <https://firebase.google.com/docs/ai-logic> (verified 2026-07-13)
  - Note: Docs reference current-generation Gemini models and ongoing feature updates (2026), confirming active first-party Google development; not a separately acquired/discontinued brand.
  - Quote: “The latest Gemini models, like Gemini 3.5 Flash , are available to use with Firebase AI Logic! Learn more.”
- **Managed database**: Yes — <https://firebase.google.com/products/firestore> (verified 2026-07-13)
  - Quote: “Cloud Firestore is a NoSQL document database that lets you easily store, sync, and query data for your mobile and web apps - at global scale.”
- **Auth built in**: Yes — <https://firebase.google.com/products/auth> (verified 2026-07-13)
  - Quote: “Provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app.”
- **File / object storage**: Yes — <https://firebase.google.com/products/storage> (verified 2026-07-13)
  - Quote: “Powerful, simple, and cost-effective object storage service built for Google scale.”
- **Realtime subscriptions**: Yes — <https://firebase.google.com/products/realtime-database> (verified 2026-07-13)
  - Quote: “Data is synced across all clients in realtime, and remains available when your app goes offline.”
- **Serverless / edge functions**: Yes — <https://firebase.google.com/products/functions> (verified 2026-07-13)
  - Quote: “A serverless framework that lets you automatically run backend code in response to events triggered by background events, HTTPS requests, the Admin SDK, or Cloud Scheduler jobs.”
- **Auto-generated APIs**: Partial — <https://firebase.google.com/docs/firestore/use-rest-api> (verified 2026-07-13)
  - Note: Every Firestore/Realtime Database project automatically exposes a REST/RPC API without writing server code, but it is not a schema-to-REST generator like PostgREST; primary access pattern is via clien
  - Quote: “While the easiest way to use Cloud Firestore is to use one of the native client libraries, there are some situations when it is useful to call the REST API directly.”
- **Self-hostable**: No — <https://firebase.google.com/docs> (verified 2026-07-13)
  - Note: Firebase is a fully managed Google Cloud service; there is no self-hosted/on-premise deployment option for the backend.
  - Quote: “Accelerate your development with fully managed infrastructure, powered by Google Cloud, so you can focus on what matters most.”
- **Open source**: Partial — <https://firebase.google.com/products/auth> (verified 2026-07-13)
  - Note: Some client SDKs/tools (e.g. FirebaseUI) are open source, but the Firebase backend/platform itself is proprietary and closed (see Terms of Service).
  - Quote: “FirebaseUI provides a customizable, open source, drop-in auth solution that handles the UI flows for signing in users.”
- **Client SDKs**: Yes — <https://firebase.google.com/docs/libraries> (verified 2026-07-13)
  - Quote: “Add Firebase - Apple platforms (iOS+) Add Firebase - Android Add Firebase - Web Add Firebase - Flutter Add Firebase - C++ Add Firebase - Unity”
- **Row-level security**: Partial — <https://firebase.google.com/docs/rules> (verified 2026-07-13)
  - Note: Access control is enforced via Firebase Security Rules, a declarative rules language evaluated server-side per request/document, not SQL row-level security policies.
  - Quote: “Define granular, server-enforced rules to protect your database and storage data.”
- **Vector / AI support**: Yes — <https://firebase.google.com/docs/firestore/vector-search> (verified 2026-07-13)
  - Note: Firestore supports KNN vector search over stored embeddings; Firebase AI Logic separately provides direct access to Gemini models from client apps.
  - Quote: “This page shows you how to use Cloud Firestore to perform K-nearest neighbor (KNN) vector searches using the following techniques:”
- **Free tier**: Yes — <https://firebase.google.com/pricing> (verified 2026-07-13)
  - Quote: “No-cost (Spark plan)”

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Ranked by verified data, never by who paid. https://altcatalog.com/trust/