🛠️ dev tools

Firebase costs $25/mo.
These cost $0.

14 free alternatives to Firebase, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.

⚡ Quick Verdict · 2027 Guide

The top-rated free, open-source replacement for Firebase is Supabase (Apache-2.0 Open Source). Across this category, 10 self-hostable tools are available (including Supabase and Appwrite). Switching a 5-person team saves up to $1,500/year compared to Firebase's $25/mo subscription.

The catch: Supabase replaces Convex's document/function runtime with PostgreSQL, SQL migrations, row-level security, and separate services, so the application architecture must be rewritten rather than simply moved.

See the 14 picks ↓

Firebase vs Free Alternatives

Quick side-by-side comparison · $0/mo vs $25/mo

Alternative	Type	License	Where It Runs	Stars	Head-to-Head
Supabase	open source	Apache-2.0	Self-host	★ 114.6k	Firebase vs Supabase →
Appwrite	open source	BSD-3-Clause	Self-host	★ 57.9k	Firebase vs Appwrite →
PocketBase	open source	MIT	Self-host	★ 61.6k	Firebase vs PocketBase →
Turso	open source	Open Source	Local	★ 17.3k	Firebase vs Turso →
Zitadel	open source	AGPL-3.0	Self-host	★ 15.5k	Firebase vs Zitadel →
Convex	open source	Open Source	Self-host	★ 12.8k	Firebase vs Convex →
Encore	open source	Open Source	Local	★ 12.7k	Firebase vs Encore →
Ory	open source	Apache-2.0	Self-host	★ 13.9k	Firebase vs Ory →
Instant	open source	Open Source	Local	★ 10.6k	Firebase vs Instant →
NHost	open source	MIT	Self-host	★ 9.4k	Firebase vs NHost →
Bknd	open source	Open Source	Self-host	★ 3.8k	Firebase vs Bknd →
Soketi	open source	Open Source	Self-host	★ 5.6k	Firebase vs Soketi →
Nitric	open source	Open Source	Local	★ 2k	Firebase vs Nitric →
undb	open source	Open Source	Self-host	★ 3k	Firebase vs undb →

The picks

14 open source · ranked by fit

01
Supabase
open sourceApache-2.0Self-host
114.6knov 2026
Provides a full backend stack built on Postgres: authentication, auto-generated APIs, edge functions, realtime subscriptions, file storage, and vector search.
The catch vs Firebase
Supabase replaces Convex's document/function runtime with PostgreSQL, SQL migrations, row-level security, and separate services, so the application architecture must be rewritten rather than simply moved.
Install, platforms & data +
platforms
webself-hostedcliself-host, real ops
install
Hosted Supabase project, or the official Docker Compose stack; `supabase start` runs the local stack
setup
Self-hosting is not 'just Postgres': the Compose stack needs many secrets and services, plus SMTP, object storage, TLS, backups, observability, and coordinated upgrades.
your data
Relational data, auth records, and platform metadata live in PostgreSQL; Realtime consumes the Postgres replication stream; object data lives in the configured storage backend with metadata in Postgres; edge-function and migration source stays in project files. Supabase Cloud stores and operates the managed copy.
checked
2026-11-07
Visit supabase.com ↗Source Compare vs Firebase →also replaces 7 other apps →
02
Appwrite
open sourceBSD-3-ClauseSelf-host
57.9knov 2026
Open-source development platform with built-in backend infrastructure, web hosting, and security features. Scale applications using your preferred programming languages.
The catch vs Firebase
Appwrite supplies the backend pieces but not Convex's end-to-end reactive TypeScript query model, automatic dependency tracking, transactional functions, or client cache semantics.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Hosted Appwrite Cloud signup, or the official Docker installer/Compose stack
setup
The installer is one command, but it expands into a large multi-container platform; production use still needs a domain, TLS, SMTP, storage, backups, and careful version upgrades.
your data
Self-hosted Appwrite stores application records in MariaDB, queues and cache in Redis, and uploaded files in Docker volumes or a configured object-storage adapter; functions and build artifacts are managed by the Appwrite worker/executor services. Appwrite Cloud stores the equivalent data in Appwrite's infrastructure.
checked
2026-11-07
Visit appwrite.io ↗Source Compare vs Firebase →also replaces 7 other apps →
03
PocketBase
open sourceMITSelf-host
61.6knov 2026
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.
The catch vs Firebase
PocketBase is excellent for one modest app, but a single SQLite server with no built-in functions runtime cannot match Firebase's offline SDKs, global scaling, messaging, analytics, or managed operations.
Install, platforms & data +
platforms
desktopself-hostedone-click install
install
Download one platform binary and run `pocketbase serve`; build from Go source only for custom extensions
setup
It installs unusually cleanly, but a public deployment still needs process supervision, HTTPS/reverse proxying, backups of `pb_data`, and a deliberate upgrade routine.
your data
Collections, auth records, settings, and application data live in SQLite files under `pb_data`; uploaded files live under `pb_data/storage` by default or in configured S3-compatible storage, and schema migrations can be kept as JavaScript files in `pb_migrations`.
checked
2026-11-07
Visit pocketbase.io ↗Source Compare vs Firebase →also replaces 5 other apps →
04
Turso
open sourceOpen SourceLocal
17.3knov 2026
Turso provides a simple developer experience with SQLite compatibility, allowing you to build and scale multi-tenant applications with unlimited databases.
The catch vs Firebase
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/tursodatabase/libsql or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit turso.tech ↗Source Compare vs Firebase →also replaces 5 other apps →
05
Zitadel
open sourceAGPL-3.0Self-host
15.5knov 2026
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Auth0.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/zitadel/zitadel or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit zitadel.com ↗Source Compare vs Firebase →also replaces 7 other apps →
06
Convex
open sourceOpen SourceSelf-host
12.8knov 2026
Open-source reactive database that keeps your web and mobile apps in sync. Write everything in TypeScript with built-in auth, cron jobs, and AI integration.
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/get-convex/convex-backend or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit convex.dev ↗Source Compare vs Firebase →also replaces 4 other apps →
07
Encore
open sourceOpen SourceLocal
12.7knov 2026
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.
The catch vs Firebase
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/encoredev/encore or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit encore.dev ↗Source Compare vs Firebase →also replaces 2 other apps →
08
Ory
open sourceApache-2.0Self-host
13.9knov 2026
Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Auth0.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/ory/hydra or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit ory.sh ↗Source Compare vs Firebase →also replaces 7 other apps →
09
Instant
open sourceOpen SourceLocal
10.6knov 2026
Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.
The catch vs Firebase
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/instantdb/instant or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit instantdb.com ↗Source Compare vs Firebase →also replaces 4 other apps →
10
NHost
open sourceMITSelf-host
9.4knov 2026
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.
The catch vs Firebase
Nhost's PostgreSQL-and-GraphQL model is conventional and powerful, but it does not reproduce Convex's reactive functions, automatic cache invalidation, or unified TypeScript data model.
Install, platforms & data +
platforms
webself-hostedcliself-host, real ops
install
Hosted Nhost project, or Nhost CLI/Docker for local and self-hosted deployments
setup
Self-hosting means operating PostgreSQL, Hasura, authentication, storage, functions, networking, secrets, email, and upgrades rather than one small binary.
your data
Application and auth records live in PostgreSQL, GraphQL metadata and migrations can live beside the project in version-controlled files, uploaded objects use S3-compatible storage, and serverless-function source remains in the project directory. Nhost Cloud runs those services in Nhost's infrastructure.
checked
2026-11-07
Visit nhost.io ↗Source Compare vs Firebase →also replaces 4 other apps →
11
Bknd
open sourceOpen SourceSelf-host
3.8knov 2026
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/bknd-io/bknd or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit bknd.io ↗Source Compare vs Firebase →also replaces 3 other apps →
12
Soketi
open sourceOpen SourceSelf-host
5.6knov 2026
Open-source, Pusher-compatible WebSockets server that's simple, fast, and resilient for building real-time applications.
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/soketi/soketi or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit soketi.app ↗Source Compare vs Firebase →
13
Nitric
open sourceOpen SourceLocal
2knov 2026
Nitric automates cloud infrastructure provisioning from your application code for AWS, GCP and Azure
The catch vs Firebase
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/nitrictech/nitric or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit nitric.io ↗Source Compare vs Firebase →also replaces 4 other apps →
14
undb
open sourceOpen SourceSelf-host
3knov 2026
Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly
The catch vs Firebase
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/undb-io/undb or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit undb.io ↗Source Compare vs Firebase →also replaces 2 other apps →

Firebase Head-to-Head Comparisons (2027)

Side-by-side trade-off breakdowns · 14 free alternatives

Firebase vs SupabaseApache-2.0 · Self-host →

Firebase vs AppwriteBSD-3-Clause · Self-host →

Firebase vs PocketBaseMIT · Self-host →

Firebase vs TursoOpen Source · Local →

Firebase vs ZitadelAGPL-3.0 · Self-host →

Firebase vs ConvexOpen Source · Self-host →

Firebase vs EncoreOpen Source · Local →

Firebase vs OryApache-2.0 · Self-host →

Firebase vs InstantOpen Source · Local →

Firebase vs NHostMIT · Self-host →

Firebase vs BkndOpen Source · Self-host →

Firebase vs SoketiOpen Source · Self-host →

Firebase vs NitricOpen Source · Local →

Firebase vs undbOpen Source · Self-host →

Frequently Asked Questions

Direct answers · Firebase open-source replacements

What is the best free alternative to Firebase?+

The top free alternative to Firebase is Supabase (open source, Apache-2.0). Provides a full backend stack built on Postgres: authentication, auto-generated APIs, edge functions, realtime subscriptions, file storage, and vector search. Other popular Firebase replacements include Appwrite, PocketBase, Turso.

Can I self-host a free replacement for Firebase?+

Yes. Of the 14 free alternatives to Firebase, 10 can be self-hosted on your own server or local machine: Supabase (Apache-2.0), Appwrite (BSD-3-Clause), PocketBase (MIT), Zitadel (AGPL-3.0), Convex (Open Source), Ory (Apache-2.0), NHost (MIT), Bknd (Open Source), Soketi (Open Source), undb (Open Source).

How much does switching from Firebase to a free alternative save?+

Firebase starts at $25/month per seat ($300/year). Switching a 5-person team to a free alternative like Supabase saves $1,500 per year in software subscription fees.

Should I vibe-code or build my own Firebase clone from scratch?+

Our build verdict for Firebase is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Firebase or rebuilding it from scratch, deploy one of the 14 battle-tested open-source alternatives like Supabase.

What is the catch when switching from Firebase to Supabase?+

Supabase replaces Convex's document/function runtime with PostgreSQL, SQL migrations, row-level security, and separate services, so the application architecture must be rewritten rather than simply moved.