SuperAPI AI Directory
Partner with us中文AI newsFavorites
All toolsOther AI toolsClerk

Clerk

Clerk is an authentication and user management platform for modern web applications, marketed as the simplest way to add authentication and user management, built for React, Next.js, Remix, and modern web technology stacks. It does not merely provide an API, but rather provides the complete user layer required by modern applications, covering security capabilities such as user authentication, multifactor authentication, fraud and abuse prevention, session management, and email and SMS one-time passcodes. In addition to authentication, Clerk also provides B2B SaaS with user and organization onboarding management for multi-tenant applications, custom roles and permissions, and organization UI components, and supports adding subscription billing to B2C or B2B applications as React components, with built-in capabilities such as plan definition and management, unified user and subscription data, and content access control. Clerk provides SDKs for modern web and mobile frameworks, can integrate with existing tools, and can serve as a trusted source of user data. The official statement says the first 50,000 monthly retained users and 100 monthly retained organizations are free. It should be noted that the above information all comes from the official page, and more details on specific feature details, pricing, stability, and other factual information are not currently provided.

Open website

About this tool

Purpose and Positioning

Clerk's official positioning is as the simplest way to add authentication and user management to applications, built for React, Next.js, Remix, and "The Modern Web." The official emphasis is that it is not just an API, but the complete user layer for modern apps.

Main Capabilities

User Authentication and Security

The authentication-related capabilities officially listed include:

  • User authentication
  • Multifactor Authentication
  • Fraud and Abuse Prevention
  • Advanced security
  • Session Management
  • Email and SMS one-time passcodes The official statement says authentication needs are constantly changing, and Clerk keeps up with the latest trends and security best practices.

B2B SaaS Capabilities

The official statement says Clerk has all the features needed for onboarding and managing users and organizations in multi-tenant SaaS applications, specifically including:

  • Custom roles and permissions
  • Organization UI Components

Subscription Billing

The official statement says that without writing payment code, custom UI, or handling webhooks, subscriptions can be added to B2C or B2B applications, and recurring revenue can begin simply by dropping in React components. Out-of-the-box capabilities include:

  • Define and manage plans
  • Unify user and subscription data
  • Gate access to content

How to Use

  • Provides SDKs for most modern web and mobile frameworks, and the official statement says it places developer experience at the core.
  • Clerk can be used as the source of truth for user data and can be integrated with existingHas tool integration.
  • The subscription billing part supports usage by way of "dropping into React components."
  • The official page mentions that components such as <SignIn /> and <UserButton /> have built-in best practices.

Applicable scenarios

  • Developers building applications with modern web frameworks such as React, Next.js, and Remix who need to add authentication and user management.
  • Applications that need security capabilities such as multi-factor authentication, session management, and fraud protection.
  • Multi-tenant B2B SaaS applications that need organization management, custom roles, and permissions.
  • Scenarios that need to add subscription billing to B2C or B2B applications.
  • Projects that need a unified authentication SDK for web and mobile frameworks.

Limitations and missing information

  • The official page states that the first 50,000 monthly retained users and 100 monthly retained organizations are free, but it does not provide complete paid pricing, plan prices, specific limits, and billing rules; the information is not yet available.
  • Information such as specific security compliance certifications, data storage locations, and service availability SLAs is not yet available.
  • The complete list of frameworks and mobile platforms supported by each SDK is not yet available.
  • The specific payment channels and regions supported by subscription billing are not yet available.

Excerpts of user reviews (from the official page)

The official page displays reviews from multiple users, involving Supabase integration, built-in best practices for the <SignIn /> and <UserButton /> components, the Clerk CLI, automatically setting up authentication for agent coding, the free plan, the control of sign-in/sign-up flows through custom flows, mobile support, authentication on Vercel preview domains, OAuth token refresh, middleware-level authentication verification, built-in organization UI, Google OAuth UI compliance, and more. These are the personal statements of the reviewers; specific features are subject to the actual implementation.

Related tools

Browse category