Wire (from the creators of Skype) does not mandate a mobile phone number (SIM cards are tied to government identity in many countries). Only an email address is required to open a free account. Nor does Wire mandate upload of your phone's address book with personal social graph of contacts. Free for consumers with paid teams offering for enterprises, optional on-prem server. Open-source clients and server. Cross-device history if the device logs in within a few weeks of the sent message. Basic export/import for moving your device's message archive to a new device of the same type.
https://wire.com/download/
They are contributing to IETF MLS for end-to-end encrypted group messaging: https://datatracker.ietf.org/wg/mls/about/