Appwrite and Keycloak both offer robust authentication solutions but cater to different needs. Appwrite is a complete development platform that includes authentication, databases, storage, and functions, making it ideal for developers looking for an all-in-one solution. It also offers a generous free plan with 75,000 MAUs and various authentication methods such as email and password login, phone auth, magic links, email OTP, anonymous login, JWT login, SSR login, custom tokens, and two-factor authentication. On the other hand, Keycloak is an open-source identity and access management solution that excels in single-sign-on and supports OpenID Connect or SAML 2.0 Identity Providers like Google, Facebook, and GitHub. Keycloak is more focused on identity and access management, making it a strong choice for enterprises with complex authentication and authorization needs. The choice between the two depends on whether you need an all-in-one development platform or a specialized identity and access management solution.

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.

Keycloak is an open source identity and access management solution. It supports single-sign-on and integrates with OpenID Connect or SAML 2.0 Identity Providers such as Google, Facebook, and GitHub.

Keycloak offers several features including single-sign-on, identity brokering and social login, user federation, client adapters, and an admin console. It supports standard protocols like OpenID Connect and SAML 2.0.

Currently, there are no user-generated pros and cons for Keycloak. However, some general pros include its open source nature and extensive protocol support. Potential cons may include a steep learning curve for new users.

Organizations that require robust identity and access management solutions can benefit from Keycloak. It is particularly useful for companies needing to implement single-sign-on across multiple applications.