Supabase, an open-source Firebase alternative, has raised a $6 million seed round led by Coatue, Mozilla, and YC. The company is on a mission to build an incredible developer experience around the world's best open source tools. To achieve this, they have assembled over 20 angel investors, almost all of whom are technical experts. These angels include Mike Krieger (Instagram), Cassidy Williams (Netlify), Thorsten Schaeff (Stripe), Brian Douglas (GitHub), Justin Gage (Retool), Iheanyi Ekechukwu (PlanetScale), Zach Waterfield (On Deck), and Shawn Wang (Temporal). The Supabase Team is currently preparing for Launch Week, during which they will release one new feature every day.