Lucia Auth is an open-source auth library that works with any JS runtime and offers full typing. It integrates with several databases like MongoDB, PostgreSQL, MySQL, and SQLite. Supabase, on the other hand, is a comprehensive app development platform that includes user authentication, cloud functions, APIs, and more. Supabase has built-in social login integrations and comes with PostgreSQL's policy engine for fine-grained user access rules. The choice between the two depends on whether you need a specialized auth library (Lucia) or a full-fledged development platform with extensive features (Supabase).

Supabase offers a scalable solution with a free tier supporting up to 50,000 monthly active users and a Pro plan supporting up to 100,000 MAUs, with additional costs for more users. Lucia Auth focuses on providing an open-source, fully typed auth library that works across various JS runtimes and databases but does not provide specific scalability tiers. For larger-scale projects with more extensive user management needs, Supabase might be the better option.

Lucia Auth is an open-source library, which means it can be more cost-effective for small apps as there are no associated subscription costs. Supabase offers a free tier that includes up to 50,000 monthly active users, making it a viable option for small apps as well. However, if you anticipate needing more extensive features beyond authentication, Supabase’s free tier and its additional capabilities might provide better value.

Lucia Auth offers a developer-friendly experience by being fully typed and compatible with any JS runtime such as Node.js, Bun, Deno, and Cloudflare Workers. Supabase also provides a robust developer experience with a customizable authentication component for React and seamless integration with popular social login providers. The choice depends on your preference for a specialized authentication library (Lucia Auth) or an all-in-one app development platform (Supabase).

Supabase offers robust security features through PostgreSQL’s policy engine, allowing for fine-grained user access rules. It also supports social logins and multi-factor authentication (MFA) through third-party providers. Lucia Auth, while being an open-source library with flexible integration options, does not provide the same level of built-in security features as Supabase. For projects requiring advanced security measures, Supabase might be a more suitable choice.

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.

Lucia Auth is an open-source authentication library designed to simplify session management. It supports various JavaScript runtimes, including Node.js, Bun, Deno, and Cloudflare Workers, and is fully typed. The library integrates with databases such as MongoDB, PostgreSQL, MySQL, and SQLite, as well as their respective ORMs and query builders.

Pros of using Lucia Auth include being open source, fully typed, and its compatibility with any JavaScript runtime. As of now, there are no user-generated cons listed for Lucia Auth.