Proton, who I use for mail and various other services, has gone against the wishes of the majority of their userbase as measured by their own survey and implemented an LLM writing assistant in protonmail, which is a real laugh given Proton’s main hook is its services are end-to-end encrypted
(supposedly this piece of shit will run locally if you meet these incredibly high system requirements including a high end GPU or recent, high end Apple M chipset and a privacy-violating Chromium-based browser. otherwise it breaks e2e by sending your emails unencrypted to Proton’s servers, and they do a lot to try to talk over that fact)