it depends on who you want to talk to. If the protocol does not matter I suggest matrix. Otherwise I suggest more specifics.
Just my friend who doesn't have a sim card, he has an android phone
Matrix / Element should work fine then.
Signal is a very popular option.
Anything that uses XMPP.
What is the difference between XMPP vs matrix?
Using this very good comparison site in German as base and ignoring the similarities:
There are quite a few. In order of preference, I used/tried:
SimpleX Messenger is a great option.
There's tons of free options for XMPP clients and servers.
Is it better than matrix?
On user side matrix has more features (or maybe more bloat, element is kinda huge), but XMPP servers are easier to self-host
Won’t burn thru your battery or server storage either
Threema. It's e2e encrypted, comes with essentially everything a modern messenger needs and doesn't require you to sign up with your phone numbers.
If you want a simpler solution than Matrix and don't mind using a non-opensource app you could try twinme. You only need a username and a picture to create an account (could be anything, "Jane Doe" and a white square if you want). It has a couple unique features like multiple identities and click-to-call links, which you can share with people who don't have the app so they can call you using only a web browser (e.g. on craigslist, lost pet flyers, ...).
I work on this app as a full-stack dev, and for what it's worth we only upload/store data that is strictly required for the app to work. We're lobbying to open source it because we have nothing to hide and we know how important it is for the privacy/security minded folks, but it will take some convincing before management agrees to it...
An independent audit would go a long way as well...looks interesting.
Thanks for checking us out :) We had an audit done by quarkslab a few years back, and another one coming up this year since we're currently implementing verified relations (signed SDPs). I'll edit my comment with a link when I get back to work next week.
Signal is probably your best bet for a solid user-friendly (and privacy respecting) experience with calls. Matrix/element is another decent option (its federated like lemmy and mastodon) but a bit less intuitive.
I don't know why people are downvoting you, might have better luck in something like a technology-centered community or putting some more information like what device or uses you have for it.
If you're looking for an app for a mobile device while connected to wifi, there are a lot out there but they are all pretty sketchy in my experience (thinking like text-now which offers a free limited number to use but privacy and ad-blocking get thrown out the window). If you're looking for a messenger that doesn't have a number associated with it, something like matrix that was suggested should work (or whatever preference the people you communicate the most with prefer).
Exactly, I'm looking for an app that only requiere wifi and supports calling. I already tried jami but it's not very reliable for some reason
hmm, well it's unfortunately usually a "you pay for what you get". If you're not paying then you're gonna end up as the product. I only have experience with "text now" which I've used in a pinch before and it has some limitations on the calls which you'll usually end up running into on any app. I wouldn't be surprised if there was some better ones out there. If you're worried about what kind of App you're downloading you might try the !privacy@lemmy.ml community as someone there might have a better source that isn't constructed to mine your data.
Signal. If you don't want to use a phone number to sign up, then Simplex Chat, but usability is bad.
They don't have a Sim.
Pretty sure you can sign up with a username now for signal. No number required.
You can hide your number but you still need a SIM
Mine is registered to my VoIP number. Never had any issues. No sim required.
Delta Chat
There’s always good old Discord, you just need WiFi.
I’m confused, why hasn’t Signal been suggested? Pretty sure it works just fine with WiFi only.
You need a phone number.
I forgot about that.
Discord, video game chats, steam chat, briar.
Telegram? You can use virtual numbers.
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