[planxty]

Cognito has an awful API and worse documentation. It's also super limited in terms of how user metadata is represented, is hard to query efficiently for users meeting certain criteria, and produces super cryptic errors when integrations aren't set up correctly. As a whole the Cognito product feels like some weird bolted-on POC that AWS decided to charge money for. Compare that to a real _product_ like Auth0 and it just falls to pieces.

If the appeal is about free usage under 40k monthly active users, you probably don't need an external complex managed auth solution in the first place.