Clerk vs FusionAuth
On the evidence we track, Clerk leads this comparison with a composite score of 72/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for auth & identity software. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Clerk
LeaderA cloud-based authentication and user management platform offering prebuilt UI components, APIs, and dashboards to implement user sign-in, profile management, organizations, and billing features.
FusionAuth
FusionAuth is an identity and access management solution providing comprehensive authentication capabilities including social login, passwordless authentication, multi-factor authentication, and single sign-on. It supports self-hosted, cloud, and hybrid deployment models with transparent, predictable pricing and full API-first integration.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Clerk
LeaderFrom $25/month. Free tier with 10,000 MAUs.
- FreeFree
- Sign-in and sign-up
- Customizable sign-in pages
- Custom domain
- Profile management
- Social login
- Pro$25/month plus $0.02 per additional MAU
- All Free features
- Remove Clerk branding
- Custom session duration
- Password complexity requirements
- User ban/unban
- +4 more
- EnterpriseContact sales
FusionAuth
Free self-hosted Community edition. Paid cloud plans from $162/mo for Starter.
- CommunityFree
- Core authentication standards and features
- Community support via forums, Slack, and GitHub
- Self-hosted deployment
- Starter$162/mo when billed annually
- Premium authentication features
- Advanced MFA methods
- Application theming
- Breached password detection
- Machine-to-machine authentication
- +1 more
- EssentialsStarting at $2,970/mo billed annually
- Advanced connectivity, MFA, and security features
- Custom OAuth scopes
- Email support with 24-48 hour response during business hours
- Business hosting included
- EnterpriseContact sales
- All Essentials features
- Advanced threat detection
- SSO tenant manager
- 24/7 phone and email support
- Private Slack channel with contract
- +2 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Clerk
Leader- Google OAuth
- GitHub OAuth
- Google Workspace
- Convex
- MCP
FusionAuth
- LDAP
- Legacy database systems
- Kafka
- Custom APIs
- Webhooks
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.