Free PostgresOpen-source BaaS
Supabase
Full-stack apps on Postgres
Starts atFree
Bandwidth5 GB / mo
Storage500 MB DB + 1 GB files
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Free Postgres, auth and functions — until they idle
Full-stack apps on Postgres
Document databases that never need a card
Serverless Postgres branches
Rate limiting, caching and queues on the edge
Apps needing auth + database
Full backends without writing one
Low-latency SQL close to your users
Every link below goes to the provider’s own docs — the real setup steps, the real limits, the CLI reference straight from the people who wrote it. Free tiers change there first, weeks before anyone writes a tutorial about it.