Open Source Backend-as-a-Service (BaaS) Software
Backend-as-a-Service (BaaS) software provides the infrastructure needed to manage databases, user authentication, and file storage without writing custom server code. These tools automate the creation of REST and GraphQL APIs to connect frontend applications to their data sources. This type of software serves developers who need to deploy web or mobile apps quickly. Self-hosting these apps ensures that database schemas and user credentials remain on private hardware. This approach removes reliance on external cloud vendors for managing API endpoints and real-time data streams.
This page lists 17 open source tools in the Backend-as-a-Service (BaaS) category. The most popular are Dify, PocketBase and Appwrite. Most use the Apache-2.0 or MIT license, and 16 offer an official Docker image.
Dify
A visual development platform for building agentic workflows, RAG pipelines, and applications powered by large language models.
PocketBase
Provides a self‑hosted backend with real‑time SQLite database, authentication, file storage and admin UI.
Appwrite
Provides backend infrastructure and web hosting for building web, mobile, and AI applications from one place.
Payload
A Next.js native headless content management system for managing data with TypeScript and automatic type generation.
Directus
A headless CMS and API engine that wraps SQL databases with REST and GraphQL API layers.
Hasura
Generate a composable and secure API endpoint to access data from multiple database sources.
TrailBase
A single executable backend providing type safe REST and realtime APIs with built in authentication.
Judge0
A sandboxed online code execution system for running untrusted code across multiple programming languages.
Bknd
A lightweight backend as a service providing database management, authentication, media storage, and automated workflows.
undb
A no-code database and backend as a service for managing tables and generating RESTful APIs via SQLite.
TileServer GL
Host and serve vector and raster map tiles with GL styles for various web and mobile clients.
Fusio
Self-hosted API management platform to transform internal infrastructure into scalable API products for humans and AI agents.
OpenRemote
An open source IoT platform for device management, asset tracking, and automation via a rules engine.
DreamFactory
A self-hosted data access platform that automatically generates governed REST APIs from various data sources.
OpenSIPS
A multi-functionality SIP server implementation designed for professional communication platforms requiring high performance and security.
Para
Multitenant backend server for object persistence and retrieval to accelerate web and mobile app development.
Juno
A self hosted serverless platform for hosting static websites and running functions with integrated backend services.
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