Clerk vs. Firebase

Clerk

Clerk is a comprehensive user management and authentication platform designed to streamline how developers handle user accounts within web and mobile applications. It offers a suite of embeddable UI components—such as <SignIn/>, <SignUp/>, <UserButton/>, and <UserProfile/>—that integrate seamlessly into your application without redirecting users off-site. These components are fully customizable to match your brand, making the user experience cohesive and frictionless. Under the hood, Clerk provides a robust API and SDKs compatible with modern frameworks like Next.js, Remix, React, and Expo. It handles the entire authentication lifecycle, supporting multifactor authentication (MFA), session management, passwordless sign-in (via magic links or one-time passcodes), and traditional password-based methods with breach detection. The platform also integrates social sign-on (SSO) with over 20 providers, enabling quick user onboarding while adhering to security best practices. Clerk’s securit...

Firebase

Google's Firebase is an entire app development platform that's packed with features.It comes with storage, cloud functions, monitoring and, of course, user authentication. The free tier comes with 50,000 MAUs. Beyond that pricing start at $0.0055/MAU and goes down to as low as $0.0025/MAU as you scale to millions of users. Firebase authentication supports email and password auth, phone auth, magic links, two-factor authentication and social identity providers - mainly Google, Google Play Games, Facebook, Apple, Microsoft, Twitter, GitHub and OAuth access tokens.

Reviews

Reviewed on 2/25/2025

Clerk is a comprehensive authentication and user management platform. It comes with embeddable UIs, APIs and admin dashboards for user management. Clerk offers official SDKs for Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby / Rails. There are many more community SDKs for other frameworks and languages. They have a free tier of 10,000 MAUs and a $25/month Pro tier with $0.02/MAU. Enhanced authentication, with SMS auth, device tracking and revocation, simultaneous sessions and SAML authentication costs additional $100/month. Admin add-on, with user impersonation and enhanced roles is another $100/month.

Reviews

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Pros
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Easy to use1
Low price per monthly active user1
Generous free tier1
Easy SMS authentication1
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