Best Self-hosted Backend-as-a-Service (BaaS) tools in 2026

Supabase is an open source Postgres development platform providing authentication, auto-generated REST/GraphQL APIs, realtime subscriptions, edge functions, file storage,...

Alternative to:

Firebase+10

Open-source Airtable alternative that turns Postgres/MySQL/SQLite into a no-code spreadsheet UI with views, permissions, integrations, and REST APIs.

Alternative to:

Airtable+10

Open-source Go backend providing embedded SQLite, realtime (SSE) subscriptions, auth (JWT/OAuth2), file storage, admin UI and REST-style APIs for web and mobile apps.

Alternative to:

PocketBase Cloud+17

Appwrite is an open-source backend-as-a-service for building web and mobile apps with authentication, databases, storage, functions, realtime APIs, and messaging.

Alternative to:

Firebase+4

Directus turns any SQL database into a headless CMS with an admin app, role-based access control, and instant REST and GraphQL APIs for custom applications.

Alternative to:

Directus Cloud+19

Open-source, API-first commerce backend with modular architecture for custom storefronts and marketplaces.

Alternative to:

Medusa Cloud+15

Open-source modular commerce platform for building custom B2C/B2B e-commerce backends with an admin dashboard, extensible modules, and APIs.

Alternative to:

Medusa Cloud+8

Hasura is an open-source GraphQL engine that instantly exposes realtime, secure GraphQL APIs over databases and other data sources with fine-grained access control.

Alternative to:

Hasura+16

Budibase is an open-source low-code platform to build internal tools, portals, forms, and approval workflows with integrations to databases and APIs.

Alternative to:

Microsoft Power Apps+18

Teable is an Airtable alternative for building database apps with a spreadsheet UI, multiple views, real-time collaboration, and a plugin system, backed by PostgreSQL.

Alternative to:

Airtable+11

Open-source headless eCommerce platform and framework for building customizable online stores with a REST API, based on PHP and the Symfony ecosystem.

Alternative to:

commercetools+7

Headless, API-first commerce platform built with TypeScript, NestJS and GraphQL; plugin-based, multi-database support and customizable admin UI.

Alternative to:

Vendure Cloud+12

TrailBase is a fast, single-executable Firebase alternative with type-safe REST and realtime APIs, built-in auth, admin UI, WebAssembly extensibility, and SQLite storage.

Alternative to:

Firebase+6

Baserow is an open-source Airtable alternative to build databases, views, forms, automations, dashboards, and internal apps with an API-first platform.

Alternative to:

Airtable+11

bknd is a lightweight Firebase/Supabase alternative that provides a modular backend with REST API, admin UI, auth, media, and workflows, deployable across many JS runtime...

Alternative to:

Firebase+9

Open-source form and data management platform with a drag-and-drop builder, embeddable form renderer, and REST API for submissions, resources, and workflows.

Alternative to:

Formstack+12

Lightweight open-source feature flag system with a relay proxy, OpenFeature support, file/cloud retrievers, and exporters for usage data.

Alternative to:

Unleash+4

MongooseIM is an open-source Erlang-based XMPP server designed for large-scale messaging, offering multi-tenant deployment, REST/GraphQL APIs, push, and robust observabil...

Alternative to:

Firebase+4

Kottster is an open-source, self-hosted Node.js admin panel that generates table views, dashboards, and custom pages on top of your existing database.

Alternative to:

Retool+5

Para is an open-source, Java-based multitenant backend framework providing a RESTful JSON API, full-text search, distributed caching, and flexible authentication for web,...

Alternative to:

Firebase+8

Graphweaver turns multiple databases and APIs into a single, code-first GraphQL API with an extensible admin UI and fine-grained access control.

Alternative to:

Hasura+10

Express middleware that generates REST collection APIs from JSON Schema with a Django-like admin UI; supports MongoDB, PostgreSQL or JSON-file storage.

Alternative to:

Directus Cloud+10

A high-performance, URL-based image transformation service written in Go, enabling on-the-fly resizing, format changes, and CDN-friendly delivery.

Alternative to:

Mapbox+1