Auth.js and Clerk both offer excellent integration with Next.js. Auth.js, formerly known as NextAuth, is specifically optimized for Next.js and offers over 80 integrations with third-party identity providers. It is also free to use and supports multiple databases like MySQL, Postgres, MSSQL, and MongoDB. Clerk, on the other hand, provides comprehensive authentication and user management features, including embeddable UIs, APIs, and admin dashboards. Clerk also supports a wide range of SDKs for various frameworks, including Next.js. Therefore, if you need robust user management features and can afford the cost, Clerk might be a better choice. For simpler, cost-effective solutions focused on Next.js, Auth.js is a strong contender.

Auth.js is generally more cost-effective as it is an open-source library that is free to use. Clerk offers a free tier for up to 10,000 Monthly Active Users (MAUs) and charges $25/month for the Pro tier with an additional $0.02 per MAU. Enhanced authentication features and admin add-ons each cost an additional $100/month. If you are looking for a low-cost or free solution, Auth.js would be the better option. However, Clerk provides more comprehensive features and support, which might justify the cost for larger or more complex applications.

Auth.js offers over 80 integrations with third-party identity providers such as Google, Facebook, Auth0, and Apple. Clerk also supports many integrations and provides official SDKs for Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails, along with numerous community SDKs for other frameworks. While both platforms offer extensive integration options, Auth.js may have a slight edge in the sheer number of third-party identity providers it supports.

Clerk is specifically designed to be a comprehensive authentication and user management platform. It offers embeddable UIs, APIs, and admin dashboards for user management, along with features like SMS authentication, device tracking, and user impersonation. Auth.js, while robust in its authentication capabilities, does not offer the same level of built-in user management features as Clerk. Therefore, for applications requiring extensive user management functionalities, Clerk would be the better choice.

Clerk is a comprehensive authentication and user management platform that provides embeddable UIs, APIs, and admin dashboards for user management. It supports multiple frameworks and languages through official and community SDKs.

Clerk offers embeddable UIs, APIs, and admin dashboards for user management. It provides official SDKs for Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails, along with community SDKs for other frameworks and languages. Clerk also includes features such as SMS authentication, device tracking and revocation, simultaneous sessions, and SAML authentication.

Clerk has a free tier that supports up to 10,000 Monthly Active Users (MAUs). The Pro tier costs $25 per month with an additional charge of $0.02 per MAU. Enhanced authentication features and an admin add-on each cost an additional $100 per month.

Clerk supports a variety of frameworks and languages through official SDKs, including Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby/Rails. There are also many community SDKs available for other frameworks and languages.

Enhanced authentication features in Clerk, which include SMS authentication, device tracking and revocation, simultaneous sessions, and SAML authentication, cost an additional $100 per month.

The admin add-on for Clerk includes features such as user impersonation and enhanced roles. This add-on costs an additional $100 per month.

Auth.js, formerly known as NextAuth, is an open-source authentication library originally built for NextJS. It is free to use and offers over 80 integrations for various third-party identity providers such as Google, Facebook, Auth0, and Apple. Auth.js can also be used with your own database, supporting MySQL, Postgres, MSSQL, and MongoDB.

As of March 2024, Auth.js is compatible with Next.js, SvelteKit, and SolidStart.

Yes, you can use Auth.js with your own database. It supports MySQL, Postgres, MSSQL, and MongoDB.

Auth.js offers a variety of features including over 80 integrations with third-party identity providers like Google, Facebook, Auth0, and Apple. It is also compatible with multiple platforms such as Next.js, SvelteKit, and SolidStart, and supports various databases including MySQL, Postgres, MSSQL, and MongoDB.