Icard is actuality the only alternative that can register as a contactless nfc payment that not relying on google/Apple wallet and its perfectly safe. It's an actual bank in Bulgaria and is eu regulated and PCI certified
Not Foss. Kinda of a privacy nightmare as you need to verify your identity and location with actual documents but as already said its not google and is a solid option if you are degoogled.
Your options in aftermarket OS fall in to 3 categories imao
those that support relocking the bootloader (grapheme,calyx,divest, other smaller projects maybe)
vanilla roms with signature spoofing permission so that you can have microg on them. Some even come with microg preinstalled (/e/,lode,Los4mg) And some are gmscomat compatible (voltage,awaken,spark). There are plenty but they don't care about signed images and relocking.
some unofficial build from any of the above from a maintainer that cares to sign his own images so that you can relock your BL as your device supports it.
Channels and groups are not encrypted in tg. Like this community we now chatting is not encrypted. I dont see anything wrong in that. For the tg encryption security audit , i think its beyond the purpuse of the channel i made so idc.
I dont even know what am i suppost to see here. Global search?
Telegram is not google. The clients are open source. And there are degoogled clients on fdroid. And eitherway you can access the channel from any browser without the need of an account
Together with the other suggestions jtx board is also a new addition Developed from the davx5 team , tasks,calendars,journals and NOTES.
The good: Easy sync of notes with any caldav provider . No extra servers and apps for tasks,cakendars,journals. Mtls support ( davx5 supports it ) for extra security if you selfhost
The bad: No desktop client
Tags are essential. As all other features I mentioned. There are tons of app lists out there. Git repos,websites,subredits even app stores, none of this option are ideal for a quick post that will provide a brief preview , catecorisation , public accessibility and user comments at the same time.
Lemmy would be great though. It has link previews. Can be webviewed without an account. Has user interaction. There is also progress on the tag system. https://github.com/LemmyNet/lemmy/issues/317#issuecomment-1688384524 If it ever goes upstream and implemented it will be perfect
If anyone can suggest a telegram alternative that can be publicly accessed without an account,can use tags and create a media and text preview from the providing link I'll be more than happy to use that instead
I used telegram after thought
Matrix is only good for continous flow chatting
There is no way to categorise and search messages
Davx⁵ has Mac OS caldav carddav server integration so you can sync with it.
https://www.davx5.com/tested-with/calendar-and-contacts-server
On android you can use simple calendar or etar to view calendars and "tasks" or jtxboard for tasks/journals