Supabase and Clerk cater to different needs based on their features and pricing. Supabase is an open-source alternative to Firebase that offers a comprehensive app development platform, including user authentication, a Postgres database, cloud functions, and more. It is highly customizable and integrates with various social login providers. Supabase's free tier supports up to 50,000 monthly active users (MAUs), while the Pro plan is $25/month for 100,000 MAUs. Clerk, on the other hand, focuses on providing comprehensive user management with embeddable UIs, APIs, and admin dashboards. It offers official SDKs for a wide range of frameworks and languages. Clerk's free tier supports 10,000 MAUs, with a Pro tier at $25/month and additional costs for enhanced authentication and admin features. If you need a more extensive app development platform, Supabase might be the better choice. However, if you require specialized user management features and extensive SDK support, Clerk could be more suitable.

Supabase offers extensive customization options, leveraging PostgreSQL's policy engine for fine-grained user access rules and providing a customizable authentication component for React. It integrates with multiple social login providers, and additional features like phone login and multi-factor authentication (MFA) can be added through third-party SMS providers. Clerk also offers customization through its embeddable UIs and a variety of SDKs for different frameworks and languages, but it shines more in user management features rather than deep customization of authentication flows. Therefore, if customization is a priority, Supabase might be the better choice.

Supabase offers a more cost-effective pricing model if you require a large number of monthly active users (MAUs). Its free tier supports up to 50,000 MAUs, and the Pro plan costs $25/month for 100,000 MAUs, with an additional $0.00325 per MAU beyond that. Clerk's free tier supports 10,000 MAUs, and their Pro tier costs $25/month with an additional $0.02 per MAU. Clerk also has enhanced authentication and admin add-ons costing an additional $100/month each. In terms of base pricing for high volumes of users, Supabase provides a more economical option.

Supabase is an open-source alternative to Firebase, offering a complete app development platform that includes user authentication, cloud functions, APIs, a Postgres database, storage, vector embeddings, and other features.

Supabase offers a variety of features such as user authentication, cloud functions, APIs, a Postgres database, storage, and vector embeddings. It also includes PostgreSQL's policy engine for fine-grained user access rules, social login integrations, and a customizable authentication component for React.

Supabase offers social login integrations with Google, Facebook, GitHub, Azure (Microsoft), Gitlab, Twitter, Discord, and many more.

Yes, phone login and multi-factor authentication (MFA) can be added to Supabase through third-party SMS providers such as Twilio or Bird.

Supabase offers a free tier with 50,000 monthly active users (MAUs). The Pro plan is priced at $25 per month and includes 100,000 MAUs, with an additional cost of $0.00325 per MAU beyond that.

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.