Amazon Cognito vs Firebase Authentication: What are the differences?
Developers describe Amazon Cognito as "Securely manage and synchronize app data for your users across their mobile devices". You can create unique identities for your users through a number of public login providers (Amazon, Facebook, and Google) and also support unauthenticated guests. You can save app data locally on users’ devices allowing your applications to work even when the devices are offline. On the other hand, Firebase Authentication is detailed as "An App Authentication System In A Few Lines Of Code". It provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app. It supports authentication using passwords, phone numbers, popular federated identity providers like Google,.
Amazon Cognito and Firebase Authentication belong to "User Management and Authentication" category of the tech stack.