Aviationstack ◆
Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.
from $49.99/mo
About Clerk
What is Clerk?
Clerk is a comprehensive authentication and user management platform designed for developers. It simplifies the complex process of adding sign-up, sign-in, and user profiles to web and mobile applications. Instead of building and maintaining authentication infrastructure, developers can integrate Clerk's pre-built components and APIs, saving time and reducing security risks.
Problem it solves
Building authentication from scratch is time-consuming and error-prone, especially when handling features like multi-factor authentication, session management, and social logins. Clerk solves this by providing a secure, scalable, and customizable solution that works out of the box. It handles the heavy lifting, so developers can focus on their core product.
Who is it for?
Clerk is ideal for startups, SaaS companies, and product teams that need robust authentication without the overhead of building it themselves. It is particularly well-suited for developers who want a fast, secure, and developer-friendly solution. It is not for those who need full control over every authentication detail or who require an on-premise solution.
Real use cases
Use Clerk to add authentication to a new SaaS product, a mobile app, or an internal tool. It supports social logins (Google, GitHub, etc.), email/password, and multi-factor authentication. For example, a project management app could use Clerk to manage user sessions and roles, while a marketplace could use it to secure buyer and seller accounts.
Key features
- Pre-built UI components — Add sign-up and sign-in flows with minimal coding.
- Multi-factor authentication (MFA) — Enhance security with TOTP or SMS verification.
- Social logins — Let users sign in with Google, GitHub, and more.
- Session management — Handle user sessions securely across devices.
- User profiles — Manage user data and custom fields easily.
- Organization support — Create and manage teams or organizations within your app.
- Developer APIs & webhooks — Integrate with your existing stack and automate workflows.
SaaSpartout Score
8.0
/10
Editorial score from our review methodology — not user ratings.
Clerk Pricing
Clerk pricing: Free plan available; paid plans start later. Billing model: Free.
Free Plan
$0/month - For small projects and testing. Includes up to 10,000 monthly active users, pre-built components, and standard features.
Pro Plan
Paid plan - For growing applications. Includes everything in Free, plus unlimited applications, priority support, and advanced features.
Enterprise Plan
Custom pricing - For large organizations with advanced security, compliance, and support needs. Features like SSO, SAML, and dedicated support are included.
All plans start with a free tier; paid plans offer a free trial.
Frequently asked questions
Is Clerk free to use?
Yes, Clerk offers a free plan that includes up to 10,000 monthly active users, making it ideal for small projects and testing.
How much does Clerk cost?
Clerk's free plan costs $0/month. Paid plans start at a competitive rate, with a free trial available for premium features.
What is Clerk used for?
Clerk is used for authentication and user management in web and mobile apps, including sign-up, sign-in, session handling, and user profiles.
Who is Clerk best for?
Clerk is best for developers and SaaS teams that want a fast, secure authentication solution without building it from scratch. It is not ideal for those needing complete control or on-premise deployment.
What are top alternatives to Clerk?
Common alternatives to Clerk include Auth0, Firebase Authentication, and Supabase Auth, each with different pricing and features.
What is a key limitation of Clerk?
Clerk is a hosted service, meaning you cannot self-host it. For organizations with strict data residency or compliance requirements, this may be a limitation.
