FusionAuth vs Clerk: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
FusionAuth
FusionAuth is a developer-first authentication platform offering flexible login, single sign-on, and user management with self-hosted or cloud deployment.
Clerk
Clerk is a developer-friendly authentication platform with pre-built components, flexible APIs, and admin dashboards for complete user management.
FusionAuth
FusionAuth is a developer-first authentication platform offering flexible login, single sign-on, and user management with self-hosted or cloud deployment.
Clerk
Clerk is a developer-friendly authentication platform with pre-built components, flexible APIs, and admin dashboards for complete user management.
FusionAuth
Password and passwordless authentication options
Social login integration (Google, Facebook, Apple, LinkedIn)
Single sign-on across applications
Multi-factor authentication and biometric support
Breached password detection
User registration and profile management
Role-based permissions and access control
REST APIs and SDK libraries
Self-hosted or cloud deployment
Customizable login pages and email templates
Clerk
Pre-built authentication components and user interfaces
20+ social login providers including Google and GitHub
Multi-factor authentication with SMS and authenticator apps
Password authentication with automatic breach detection
Organizations with roles and permissions for teams
Enterprise SSO with SAML and OAuth support
Session management and device tracking
Webhooks and API access for custom integrations
SOC 2 and HIPAA compliance
Free tier with 10,000 monthly active users
FusionAuth
FusionAuth offers flexible pricing to match different needs and deployment preferences.
Self-Hosted is completely free with unlimited users. Download and run FusionAuth on your own infrastructure with no ongoing costs. You get all core authentication features, making it perfect for development, testing, and production environments where you want full control.
Basic Plan starts at $37 per month and provides a single cloud server instance, ideal for development and testing environments. It includes one custom domain and basic cloud hosting.
Business Plan costs $225 per month and offers a dedicated server with nightly backups, availability across multiple zones, and support for up to five custom domains. This plan suits most production applications.
High Availability Plan begins at $500 per month with redundant servers, configurable backups, and up to 99.99% uptime guarantee with the Enterprise support plan. This includes 20 custom domains and deployment in any AWS region.
Clerk
Clerk offers flexible pricing to support projects of all sizes. The free plan includes 10,000 monthly active users with all core features, pre-built components, and custom domain support. Users who sign up but never return are completely free.
The Pro plan charges just $0.02 per monthly active user after your first 10,000 free users. Pro includes removing Clerk branding, allowlist and blocklist features, and customizable session duration.
For advanced needs, add-ons cost $100 per month each. The Enhanced Authentication add-on provides multi-factor auth, device tracking, and enterprise SSO. The Enhanced Administration add-on includes user impersonation and audit logs.
Organizations start at $1 per monthly active organization after your first 100 free, with unlimited members per organization in Pro.
Enterprise plans offer custom pricing with 99.99% uptime guarantees, support SLAs, HIPAA compliance, dedicated Slack support, and onboarding assistance. Startup discounts are available through partners like Y Combinator and Stripe Atlas.
