Did Meet/Teams/Skype claim E2E encryption? The only alternative I ever looked into was Jitsi (because it was the first alternative I started doing research on,

Did Meet/Teams/Skype claim E2E encryption? The only alternative I ever looked into was Jitsi (because it was the first alternative I started doing research on, and by the time I'd finished researching it there was no doubt that it was more than good enough -- and super easy to build our own cloud instance so that, even though it wasn't E2E, we had total control of the server that managed the encryption), but I don't recall hearing arguments that any of the other major competitors were actually E2E encrypted.