Check out xmpp. Wouldn't know of anything remotely as useful as tgram. If it's just about messaging yourself, you could also continue using tgram and doing your own encryption with your own bot for sensible data.
Self Hosted - Self-hosting your services.
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Gonna take this in a different direction. Sounds like you mostly want notes with attachments and organization, but you're just using chat apps for it right now.
Joplin does all the things you're talking about, including multiple backends and encryption. No need to host a server.
Simplex chat has a default "private notes" chat which is essentially chatting with yourself as you describe it.
Simplex is available for a lot of platforms and devices, and easier to install and maintain than Nextcloud. I'm not sure if it ticks all your boxes, though?
I use SimpleX for this matter. Each device get its own account, and I just create a group named "self" with all of them. You can selfhost the server too if you prefer that route.
Oops, added a suggestion of Simplex before I saw your answer. +1, I guess 🙂
Have you consider using a note taking app with server sync instead of abusing a chat service for the same thing?
I fully understand the argument and kinda agree. That said, here's why i still use the Telegram self-chat just like OP, you can suggest a note-taking app replacement if you think:
- Paste a link, instant preview of it without user intervention, can play it right on the app if it's audio/video if i want or get a preview of it if it's just a page without opening a full browser (this puts it automatically above a "synced notepad" which is what i understand note taking apps tend to be)
- Synced across devices
- Both desktop and mobile
- Private, no one else sees it
- Easy and convenient, i usually have Telegram running already, just switch to it on browser or desktop and copy or paste the thing
Gimme a note taking app that has all these, that is not a big program needing lots of resources to run all the time, and that i can self-host for the server part (or E2EE P2P like Syncthing) and we're cooking!
and also, time of "saving" is always correctly preserved
Telegram private 🙃
Matrix seems like a perfect fit for you then!
well search is not that good, it can only find exact word matches for any of the words, but otherwise yeah. though I think telegram isn't much better at this either
Search is definitely lacking sadly. Unsure if there's even solid plans to make it much better either.
I don't do a lot of message searching so luckily for me, it's not something that bothers me too much.
How about pushbullet? It's not self-hosted though, but syncs nicely between different phones and browser plugin. File transfer etc. works well, the search is rudimentary.
Honestly I'm not sure about offline support though, I haven't really been in a situation where I wanted to take a note/message myself without internet connection.
Since i use the self-chat on Telegram a lot i've wished for exactly the same thing in the past as i'm planning on leaving the service, so far haven't found a right fit yet