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Open Source Backend-as-a-Service (BaaS) Tools using JavaScript

A curated collection of the best open source cloud-based platforms providing backend services like databases, authentication, and storage. using JavaScript.

Supabase

Postgres-powered backend platform for production apps

  • Stars

    Stars growing over the last 30 days114,446

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Provides a full backend stack built on Postgres: authentication, auto-generated APIs, edge functions, realtime subscriptions, file storage, and vector search.

Open Source Alternative to:

Firebase

Appwrite

Open-source backend platform for rapid app development

  • Stars

    57,854

  • Last commit

    8 hours ago

  • License

    BSD-3-Clause
Open-source development platform with built-in backend infrastructure, web hosting, and security features. Scale applications using your preferred programming languages.

Open Source Alternative to:

Supabase

Directus

Open-source data platform for effortless content management

  • Stars

    38,799

  • Last commit

    12 hours ago

  • License

    Unknown
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.

Open Source Alternative to:

WordPress

PocketBase

Open-source backend in a single file

  • Stars

    61,611

  • Last commit

    7 days ago

  • License

    MIT
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.

Open Source Alternative to:

Supabase

Convex

Build full-stack apps with TypeScript and real-time sync

  • Stars

    12,774

  • Last commit

    8 hours ago

  • License

    Unknown
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.

Open Source Alternative to:

Supabase

Encore

Accelerate backend development with effortless scalability

  • Stars

    12,682

  • Last commit

    5 days ago

  • License

    MPL-2.0
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.

Open Source Alternative to:

Supabase

Instant

Realtime client-side database for collaborative apps

  • Stars

    10,564

  • Last commit

    15 days ago

  • License

    Apache-2.0
Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.

Open Source Alternative to:

Supabase

NHost

Serverless backend platform for modern app development

  • Stars

    9,382

  • Last commit

    11 hours ago

  • License

    MIT
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.

Open Source Alternative to:

Supabase

Rowy

Build powerful backends without leaving your browser

  • Stars

    6,848

  • Last commit

    2 years ago

  • License

    Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.

Open Source Alternative to:

Airtable

Bknd

Feature-rich backend that runs anywhere you need it

  • Stars

    3,778

  • Last commit

    2 days ago

  • License

    Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.

Open Source Alternative to:

Supabase

undb

Local-first, offline-first no-code database platform

  • Stars

    2,977

  • Last commit

    1 month ago

  • License

    AGPL-3.0
Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly

Open Source Alternative to:

Supabase
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