Clerk vs Supabase Auth vs Auth0 for sign-in
Free (50,000 monthly active users) or Pro $25/mo (100,000 included, then $0.00325 each)
- The lowest cost at scale, and sign-in sits next to your database, so row-level security rules can check who is signed in.
Free projects pause after a week without activity. The price is for the whole Supabase project, not sign-in alone. Phone-based multi-factor sign-in is an extra $75 a month on Pro.