Supabase

Open-source Firebase alternative providing a PostgreSQL database, authentication, instant APIs, real-time subscriptions, file storage, and edge functions. Widely used by developers building web and mobile backends.

5 Alternatives Found

Nhost

Sweden

Swedish open-source BaaS platform founded in Stockholm in 2020. Provides PostgreSQL, GraphQL, auth, storage and serverless functions — a direct Supabase equivalent with EU-hosted infrastructure and full self-hosting support.

Key Features

PostgreSQL databaseGraphQL API via HasuraAuthentication (email, OAuth, magic link)File storage

FreemiumFree tier available; paid plans scale with usage

Website

Aiven

Finland

Finnish managed open-source data infrastructure platform founded in Helsinki in 2016. Offers fully managed PostgreSQL and a broad suite of open-source data services across all major clouds — ideal for teams wanting the database layer of Supabase with maximum flexibility and EU governance.

Key Features

Managed PostgreSQLManaged MySQL and MariaDBApache Kafka and FlinkRedis and OpenSearch

FreemiumFree tier for small projects; usage-based paid plans

Website

PocketBase

Bulgaria

Open-source all-in-one backend packaged as a single executable file, created by Bulgarian developer Gani Georgiev. Provides realtime database, authentication, file storage and admin dashboard — deployable on any EU VPS (e.g. Hetzner, netcup) with zero external dependencies. Listed in the EuroStack EU open-source directory.

Key Features

Realtime database (SQLite)Built-in authentication (email, OAuth)File storageAdmin dashboard

FreeCompletely free and open source; self-host on any EU server (e.g. Hetzner)

Website

MariaDB

Finland

MySQL-compatible open-source relational database with its foundation headquartered in Helsinki, Finland. The MariaDB Foundation is fully relocating to Finland in 2025 to align with EU digital sovereignty goals. Best for teams needing a battle-tested relational database engine rather than a full BaaS stack.

Key Features

MySQL-compatible relational databaseOpen source under GPLHigh performance and scalabilityMariaDB SkySQL managed cloud

Open Source / EnterpriseCommunity edition free; enterprise and SkySQL managed cloud paid

Website

bknd

Switzerland

Lightweight open-source Supabase/Firebase alternative developed in Switzerland, MIT-licensed. Uniquely designed to embed directly into any JavaScript framework (Next.js, Astro, Remix) or run standalone — eliminating the need for a separate backend deployment. Actively maintained with frequent releases.

Key Features

Database management (SQLite, PostgreSQL, LibSQL)Authentication (email/password, OAuth/OIDC)Media file managementWorkflow automation (Flows)

FreeCompletely free and open source under MIT licence

Website

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