I use it personally every day to read my emails, generate drafts because RetriveIT has all the marketing material I have stored in gdrive and github. Sometimes I even use it for silly thigs like I'll ask it "what is my ITIN and what date did I register my company" because I hate having to search though gdrive to find that info when I need it.
It's technically different because unlike claude or chatgpt OAuth is bound at the workspace level not at the user level. A user can be a member of multiple workspaces, and users can share their workspace with other workspaces inside of an orginization.
There is a free signup on the site with email, it uses magic link.
For embeddings I am using Titan Text Embeddings V2