Best open-source alternatives to Supabase

Appwrite is an open-source development platform aimed at teams building web, mobile, and AI applications. It combines backend services and hosting in a single system so developers can avoid assembling a separate stack for authentication, data storage, file handling, compute, messaging, and deployment. The README positions it as both a managed cloud offering and a self-hosted platform for infrastructure under the user's control. The project is designed for developers who want production-ready primitives without implementing common backend infrastructure from scratch. It supports a broad range of client and server SDKs, and its product suite includes authentication, databases, storage, functions, messaging, and Sites for web hosting. Self-hosting is described as container-based, with installation through Docker, docker-compose, and Kubernetes-oriented deployments, making it suitable for local development as well as controlled production environments.

PocketBase is an open source backend framework and standalone server aimed at developers who want a portable backend without assembling a large stack. It packages an embedded SQLite database, user and file management, realtime subscriptions, an admin dashboard, and a REST-ish API into a single Go-based project. The project can be used in two main ways: as a ready-to-run app via prebuilt executables, or as a Go library/toolkit for building custom applications with your own business logic. The README also points to official SDK clients for JavaScript and Dart, making it easy to integrate web, mobile, desktop, and CLI applications with PocketBase's web APIs.

Hasura GraphQL Engine is an open source data access layer and GraphQL platform aimed at developers building modern applications. It exposes data through a single, composable, secure API endpoint and is presented as a project with two major tracks: Hasura V2, the current stable version, and Hasura V3, which powers Hasura DDN. The README emphasizes Hasura V3’s expanded support for multiple databases, including PostgreSQL, MongoDB, ClickHouse, and MS SQL Server, along with connector-based extensibility for custom business logic written in TypeScript, Python, and Go. It is intended for self-hosted and community use, with documentation and support resources provided through Hasura’s docs, community channels, and issue tracker.

TrailBase is a self-hosted backend platform aimed at developers building mobile, web, or desktop applications. It positions itself as an open Firebase alternative that emphasizes very low latency, fewer moving parts, and a single-executable deployment model. The project combines a server, client libraries, documentation, tests, and examples in one repository. Its README highlights type-safe REST and realtime APIs, multi-database support, a WebAssembly runtime, geospatial features, server-side rendering, authentication, and an admin UI. It can be run from pre-built binaries or Docker, and it also supports extending the server with WASM components such as an auth UI.