SimpleX Chat
simplex.chat ↗A messenger from SimpleX Chat Ltd in London that works without any user identifier: no phone number, username or ID.
For people who want the most private option and don't mind a slightly unusual way of adding contacts.
Why it’s listed
Privacy Guides recommends it1, Trail of Bits audited it in 2022 and 20242, the code is open source under AGPL3, and ToS;DR grades it B4.
The trade-off
It's a small startup that hasn't started earning yet and is raising money through equity crowdfunding5, so its site carries investor marketing.
Price
Free; private messaging stays free, per its plans.
