You can use the default (free) Matrix homeserver with Riot and you'll basically have a free chat system without any setup (besides installing the client).
I've been using Riot for a while now, and while Slack does seem a bit more polished, having client-side encryption for all my messages gives Riot the upper hand: I don't worry about sending passwords or sensitive info as much as I do with Slack.
you can participate in the discussion at https://riot.im/experimental/#/room/#modular:matrix.org to understand more if you want.
Perhaps I am overreacting, but that sort of attitude on matters core to basic privacy in the post-Snowden era seems both problematic and incurable.
I care about encryption, you care about encryption, and they care about encryption. "Giving up on them" and saying their attitude is "problematic and incurable" is hurting, not helping.
I still fell victim to apparently being reported as non-human (after 9 years of using FB with over a hundred RL friends and former class mates, many photos of me, real name from day one, and so on), and while I could send a photocopy of my ID to Facebook, as a matter of principle I didn't and won't, not without even having the right to confront my accusers. For all I know, they're bots, at best some people who didn't like a comment I made on some article -- and from the accounts of others, even showing your ID doesn't mean you won't get fucked over in a similar way again. There is just no real recourse, so why even start jumping through hoops, I'm not going to be party to normalizing that nonsense.
I also don't believe in technical solutions to social problems. Encryption gains me nothing in a world where my neighbours just shrug when I get carted off for having using encrypted communication -- or get booted off Facebook -- so that needs to be "fixed" anyway, and should it ever be, encryption would be something that protects you against criminals and assholes, not something that protects you against big brother. IMO it's lethal to assume it ever could or should. It's something we can and should use on our way to social solutions to social problems, but not something to rely on. I know that many people in other countries or very different circumstances NEED encryption, so they should have it, and I might use it out of solidarity and to give them cover even -- but that won't fix the problem anymore than Napster fixed the music industry.
But in theory all of those can be replaced, a site that was recently in the news for being kicked off Godaddy, Google, tucows, Cloudflare, the Russian media watchdog, namecheap, DreamHost and a ton of others. Today its online using a Chinese based provider.
But yeah, if SV takes a disliking to you, it can be a right PITA to find some where to get back online.
But you are right, Someone somewhere has to host you and/or provide you with services (even if you self host) you are still dependant on to be able to stay online.
I'm hoping to spend some of my christmas break contributing some work to the project. I agree, bridging SMS into a chat service that you can use from anywhere is a killer feature.