Amazon Cognito
Amazon Cognito is an AWS security service designed for identity management within your applications. It handles user authentication and access control, allowing developers to integrate secure login capabilities without building complex infrastructure from scratch. This tool helps manage user identities and permissions efficiently for various app types.
You should choose this service when you need a straightforward, always free identity solution for your applications. The pricing model is free, with an always free tier available, making it cost-effective for many use cases. However, be aware that it is strictly an identity management tool and does not include broader security features like network protection or data encryption services.