Auth.js and Appwrite are both open-source authentication solutions, but they serve different purposes. Auth.js, formerly known as NextAuth, is specifically an authentication library that integrates with multiple identity providers and is compatible with frameworks like Next.js, SvelteKit, and SolidStart. It's highly focused on providing a seamless authentication experience with various third-party providers. On the other hand, Appwrite is a comprehensive development platform that includes authentication as one of its many features. It offers a wide range of authentication methods including email and password login, phone auth, magic links, and more. If you need just an authentication solution with extensive third-party integrations, Auth.js might be a better fit. However, if you're looking for a full-fledged development platform that also includes robust authentication features, Appwrite could be more suitable.

Auth.js is completely free to use as it is an open-source authentication library. You can integrate it with your own database and identity providers without any cost. Appwrite also offers a free plan that allows up to 75,000 Monthly Active Users (MAUs), and their Pro plan is available at $15 per month. Therefore, if your primary requirement is a cost-effective solution with a lot of built-in functionalities, Appwrite's free plan could be highly advantageous. However, for purely authentication purposes, Auth.js being entirely free might be the more cost-effective option.

Auth.js offers over 80 integrations for various third-party identity providers such as Google, Facebook, Auth0, and Apple, making it highly versatile for applications that require multiple authentication options. Appwrite, while offering a variety of authentication methods, does not specify the number of third-party integrations it supports. Therefore, if having extensive third-party integrations is a critical factor for your project, Auth.js would be the better choice.

Appwrite is an open-source platform designed for building scalable applications. It includes features such as authentication, databases, storage, and functions, making it a comprehensive development platform.

Appwrite supports a variety of authentication methods including email and password login, phone authentication, magic links, email OTP, anonymous login, JWT login, SSR login, custom tokens, and two-factor authentication.

Appwrite offers an extremely generous free plan that includes 75,000 monthly active users (MAUs) at no charge. Their Pro plan is available for $15 per month.

Appwrite's main features include authentication, databases, storage, and functions. These components work together to provide a complete development platform for building scalable applications.

Yes, Appwrite is an open-source platform. This allows developers to customize and extend its functionalities according to their needs.

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.