Supabase is a popular open-source Firebase alternative that provides developers with a powerful suite of tools to build and scale their applications. It offers a real-time SQL database, authentication, storage, and serverless functions, all built on top of open-source technologies like PostgreSQL. This allows developers to leverage the familiarity and flexibility of SQL while benefiting from the convenience of a managed backend-as-a-service (BaaS).

The core of Supabase is its PostgreSQL database, which provides robust data storage and querying capabilities. Coupled with its real-time subscriptions, developers can easily build dynamic applications that update instantly for all connected users. Supabase also simplifies user management with its integrated authentication system, supporting various login methods and offering granular access control.

Beyond databases and authentication, Supabase offers file storage for assets and media, and serverless functions (Edge Functions) for custom backend logic. This comprehensive offering makes Supabase a compelling choice for startups, solo developers, and teams looking for a cost-effective and flexible platform to power their web and mobile applications without the vendor lock-in often associated with proprietary BaaS solutions.