ShareDB vs Usabilla Visual Survey

ShareDB is a realtime database backend for building collaborative applications. It allows clients to concurrently edit database documents while maintaining consistency. It synchronizes data between clients automatically and supports rich data types like JSON.

Usabilla Visual Survey is a user experience research tool that allows you to create visual surveys with images, videos, or prototypes to get visual feedback from users. It helps understand users' reactions and feelings towards designs and ideas.