Amazon Cognito is better for integration with other AWS services as it is a part of the AWS ecosystem. This allows it to seamlessly integrate with other AWS offerings, which is beneficial if your application is already using AWS. Lucia Auth, on the other hand, does not have the same level of integration with AWS, as it is designed to work with various JS runtimes and databases.

Lucia Auth is likely easier to set up than Amazon Cognito. Users have noted that Amazon Cognito can be difficult to set up and its documentation can be confusing or misleading. Lucia Auth, being an open-source library, is designed to abstract away the complexity of handling sessions and can be easier to integrate into applications, especially for developers familiar with JavaScript runtimes.

Amazon Cognito offers a generous free tier with 50,000 monthly active users (MAUs) and a low price per additional user, starting at $0.0055/month and decreasing as you scale. This can be very cost-effective for startups. Lucia Auth, being open-source, does not have direct costs associated with its use, but costs may arise from the underlying infrastructure and database services you choose to use. Therefore, if cost is a primary concern, Amazon Cognito offers a clear pricing model that may be advantageous for startups.

Lucia Auth offers better support for different JavaScript runtimes as it works with Node.js, Bun, Deno, and Cloudflare Workers. This flexibility makes it a good choice for developers working across different environments. Amazon Cognito, while robust in its own right, does not provide the same level of flexibility specifically tailored to different JavaScript runtimes.

The pros of Amazon Cognito include its generous free tier, low price per monthly active user, and seamless integration with the AWS ecosystem. However, users have reported that the documentation can be confusing and sometimes misleading, and setting up the service can be difficult.

Amazon Cognito is a user authentication service that is part of the AWS ecosystem. It allows users to sign up and sign in with federated identity providers like Facebook, Google, Apple, and Amazon. The service offers a free tier with 50,000 monthly active users (MAUs), and the cost for additional users starts at $0.0055 per MAU, decreasing as the number of users increases.

The main features of Amazon Cognito include integration with four federated identity providers (Facebook, Google, Apple, and Amazon), a generous free tier with 50,000 monthly active users, and competitive pricing that decreases as the number of users scales. It also integrates well with other AWS services, making it a comprehensive solution for user authentication within the AWS ecosystem.

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.