Supabase is the open-source Firebase alternative, providing Postgres, authentication, instant APIs, edge functions, real-time sync, and storage—all in one scalable platform.
Midday is the open-source financial platform for founders, automating invoicing, time tracking, reconciliation, and financial insights—all in one place.
PostHog provides open-source web & product analytics, session recording, feature flagging and A/B testing that you can self-host.