Authentication & Identity shortlist: Customers (B2C / B2B SaaS) + Free tier / bootstrap + Lowest cost
Find the right auth provider based on who you're authenticating, what compliance requirements apply, and what your team can realistically operate. A developer-first startup self-hosting Supabase Auth has different needs than an enterprise deploying SSO across 10,000 employees with SOC 2 requirements. Pricing models differ significantly too—per-MAU versus per-seat versus flat-rate can change your total cost by 10x at scale. These filters help you skip the obvious mismatches.
3 products match your constraints
Each product below fits the filters you selected. Click through to read the full decision brief — pricing behavior, limits, and what breaks first.
AWS Cognito is an AWS-native authentication service for user pools and federated identity. It’s best when you want cloud-native building blocks and are willing to engineer the UX and edge cases yourse…
Firebase Authentication provides SDK-driven login for web and mobile with minimal backend work. It’s best when you want fast shipping and your identity needs don’t include deep B2B enterprise features…
Supabase Auth is authentication integrated into a Postgres-first backend, designed to pair login with database-backed authorization (RLS) and app data. It’s best when you want one cohesive stack and c…
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