Clerk vs SuperTokens
Pricing
Clerk: Free up to 10k MAU, from $25/mo
SuperTokens: Free self-hosted, managed from $0 (up to 5k MAU)
Description
Clerk: Drop-in auth with pre-built UI components: sign-up, sign-in, and user management in minutes
SuperTokens: Open-source authentication you can self-host for free or use their managed service
Pros
- Pre-built React components for auth that actually look good out of the box
- 10,000 monthly active users free: most startups run free for months
- Handles the hard stuff: MFA, social login, organization management
- Fully open source (Apache 2.0): inspect every line, fork it, no vendor lock-in
- Self-hosted option means zero recurring cost for auth, ever
- Pre-built login UI with session management, MFA, and social login
Cons
- Vendor lock-in is real: migrating away from Clerk means rebuilding auth
- Pricing jumps at scale (10k+ MAU) can surprise you
- React-focused, less polished for non-React stacks
- Self-hosting requires running a Java backend service alongside your app
- Smaller community and fewer integrations compared to Auth0 or Clerk
- Documentation covers the basics but thins out for advanced customization
Details
Clerk gives you a complete auth system without building one. Install the package, drop in the sign-up component, and you have Google login, email/password, MFA, and user profiles working. The UI components look professional without any styling work.
The 10,000 MAU free tier is genuinely generous: most early startups will not outgrow it for months. The concern is lock-in: once your app is wired to Clerk’s components and APIs, moving to something else is a significant rewrite. If you are validating an idea and need auth fast, Clerk is the fastest path. If you are building something you expect to maintain for years, consider whether the convenience is worth the dependency.
SuperTokens is an open-source auth provider that gives you a real alternative to paying per-user fees. Self-host the SuperTokens core (a Java service) alongside your app, and you get email/password, social login, passwordless, session management, and MFA without paying anyone anything. The managed version is free up to 5,000 MAU if you do not want to run infrastructure.
The tradeoff is operational complexity. Self-hosting means you own the auth infrastructure: updates, monitoring, backups. The core service runs on Java, which adds a dependency some teams would rather avoid. If you are building a product where long-term auth costs matter (high user count, thin margins), SuperTokens can save you thousands per year. If you just want auth working in an afternoon and do not mind paying Clerk or Auth0 later, those are faster to set up.
Verified
