AWS Cognito and Supabase both offer robust solutions for user authentication, but they cater to different needs. AWS Cognito is geared towards comprehensive identity management with built-in support for OAuth 2.0, AWS credentials, and integration with enterprise directories, making it suitable for large-scale enterprise applications. Supabase, on the other hand, is an open-source alternative to Firebase, providing a complete app development platform with PostgreSQL's policy engine for fine-grained access control, social login integrations, and a more developer-friendly setup. Supabase may be more appealing for developers looking for a cost-effective, flexible solution, especially with its free tier that supports up to 50,000 monthly active users.

Supabase tends to be more cost-effective for startups, especially in its early stages. Supabase’s free tier supports up to 50,000 monthly active users and their Pro plan at $25/month supports up to 100,000 monthly active users with additional costs of $0.00325 per MAU beyond that. AWS Cognito’s pricing can vary significantly based on the number of users and specific features used, potentially making it more expensive for startups with limited budgets.

AWS Cognito provides a comprehensive suite of security features including multi-factor authentication (MFA), encryption at rest and in transit, and integration with enterprise directories for enhanced security. Supabase also offers robust security features, including PostgreSQL's policy engine for fine-grained access control and the ability to add MFA through third-party providers like Twilio. While both platforms offer strong security measures, AWS Cognito may offer more out-of-the-box enterprise-level security features.

Both AWS Cognito and Supabase are designed to scale with your application's needs. AWS Cognito is built on AWS's global infrastructure, allowing it to handle large-scale enterprise applications with ease. Supabase, while also scalable, is particularly well-suited for developers who prefer an open-source solution and need flexibility in scaling. However, AWS Cognito’s integration with other AWS services can make it a more robust choice for applications expecting significant growth and requiring seamless scalability across different services.

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.

Amazon Cognito is an identity platform for web and mobile apps. It serves as a user directory, an authentication server, and an authorization service for OAuth 2.0 access tokens and AWS credentials. With Amazon Cognito, you can authenticate and authorize users from the built-in user directory, from your enterprise directory, and from consumer identity providers like Google and Facebook.

Pros of AWS Cognito include its generous free tier, low price per monthly active user, and strong integration with the AWS ecosystem. These features make it a cost-effective and scalable solution for user authentication. However, some users may find the setup and configuration complex if they are not familiar with AWS services.

AWS Cognito can handle authentication from the built-in user directory, enterprise directories, and consumer identity providers like Google and Facebook. This makes it versatile for different types of applications and user bases.

Yes, AWS Cognito is suitable for large-scale applications due to its scalability and integration with the AWS ecosystem. It can handle a high number of users and provides features like multi-factor authentication and encryption for added security.

Yes, AWS Cognito integrates seamlessly with other AWS services such as AWS Lambda, Amazon API Gateway, and Amazon S3. This allows developers to build comprehensive solutions with secure user authentication and data management.