FusionAuth vs Clerk: Features, Pricing and User Reviews 2026
FusionAuth
Developer Authentication Platform
Clerk
Complete Authentication for Modern Apps
FusionAuth
Developer Authentication Platform
Clerk
Complete Authentication for Modern Apps
What are FusionAuth and Clerk?
FusionAuth is a complete authentication system that manages who can access your application and what they can do. You can install it on your own computer, your company servers, or use their cloud service. This flexibility makes it different from most authentication tools that force you to use only their cloud.
The platform supports all modern login methods - traditional passwords, passwordless access, social media logins, and biometric authentication like fingerprints. It follows industry standards like OAuth2, OpenID Connect, and SAML, meaning it works smoothly with other software.
There is a free version with all core features, and paid plans add extra security, support, and cloud hosting. The free version has no user limits, making it suitable for projects of any size.
Clerk is an authentication platform that handles all aspects of user identity and access control. You get pre-built login screens, user profile pages, and account management tools that you can customize to match your brand. Unlike basic auth solutions, Clerk provides advanced features out of the box.
It supports multiple sign-in methods including passwords with breach detection, social logins from providers like Google and GitHub, email codes, and SMS verification. For business applications, Clerk includes organizations with roles and permissions, allowing you to build team-based features easily.
The platform also handles security requirements like multi-factor authentication, session management, and device tracking. Everything is managed through a dashboard where you can monitor users, configure settings, and access detailed analytics.
Features of FusionAuth and Clerk
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
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
Use Cases of FusionAuth and Clerk
Pricing of FusionAuth and Clerk
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 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.
FAQs: FusionAuth vs Clerk
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