Teknik

Requires an invite code to register. Supports mail clients. Has a nice feature of (I assume) displaying your public PGP key to others if you provide it. The privacy policy does not say much, however:

We use Piwik to track user interaction with the site. We keep it hosted on the server locally, so no analytic data is leaving the server.

Piwik has changed its name to Matomo recently, so just read ProtonMail's section to know more about it.

Dates - When you perform an action (ie: register an account), the date of the action will be recorded.

I assume this goes for all actions? Then it's absolutely terrible. What comes next?

Emails - Any email you send or receive with your Teknik.io email address is stored locally onto the server. These emails are not read.

Thanks for not reading my mail...and that's it for Teknik's privacy policy! No mention of whether the deleted e-mail is actually deleted, if there are any backups, what kind of data is shared and under what conditions. Nothing whatsoever! Pretty suspicious if you ask me. IMO, it's not even worth bothering to get an invite code for this, when better alternatives exist that don't require it. NOTE: The webmail can conflict with the LinkBot extension if you use it, so disable it for this website.