Naven
Glossary
Account deletion
Removing an account and the data attached to it, as opposed to disabling it.
Many services offer deactivation and call it deletion. The difference is whether the data still exists after the button is pressed — deactivation keeps everything and merely stops showing it, usually because the service would like you back.
A real deletion flow says what will go, what will remain and why, and how long it takes.
Where Naven stands
Naven deletes rather than deactivates, and says which traces survive: a message you sent to somebody else is in their conversation, and removing your account does not reach into it.