Name: Crowdin
Homepage: https://crowdin.com/
Short description: Crowdin is a proprietary, cloud-based localization technology and services company. It provides software as a service for commercial products, and it provides software free of charge for non-commercial open source projects, and educational projects. (From https://en.wikipedia.org/wiki/Crowdin)
Optional API documentation URL: https://developer.crowdin.com/api-clients/
On the profile page is there a bio description field. It is similar to Weblate, while this one is free software.