Comparison

Clerk vs Supabase

Clerk and Supabase both land on Depends.

Clerk

Depends

Confidence: Medium

Buy if you're a React/Next.js team shipping fast and staying under the free tier's 50K users.

Depends

Confidence: Low

Buy if you have developers who want a managed Postgres backend with serious compliance credentials (SOC 2, HIPAA, ISO 27001).

Clerk versus Supabase
Compare	Clerk	Supabase
Verdict	Depends	Depends
Best for	React/Next.js startups	Developer teams wanting Postgres plus auth, APIs, and storage
Who it's not for	High-volume consumer apps . MAU pricing bites hard	Non-technical teams wanting a no-code database
Privacy	Multiple public CVEs including a CVSS 9.1 auth bypass . pattern warrants monitoring before trusting it with critical flows.^⁶	Strong on paper: SOC 2 Type 2, ISO 27001, HIPAA (with BAA), AES-256 at rest, TLS in transit, regular pen tests.¹¹
Support quality	No support evidence found	No support evidence reviewed
Public sentiment	Developers consistently praise the fast React/Next.js setup but complain loudly that pricing scales badly with user growth.^²	No independent user reviews were found in the sources reviewed.
Biggest gotcha	MAU-based pricing escalates fast; founder publicly answered 'predatory pricing' accusations¹³	Shared responsibility model: misconfigured RLS policies or leaked API keys are your problem, not theirs.¹¹