The group I currently play with uses a group chat over SMS/MMS. But I'm going to be DMing a campaign with an open table, so I need something more persistent and flexible. I've used Discord in the past but IMHO it has way too many features.
What have you used to keep in touch with your players?
Discord. I got a channel for absentees, one for scheduling, one for talking, one for roleplaying, and of course vocal and webcam features. Also uses a bot for music on it for free. You can add how many channels you want for : lore, maps, links, memes, etc
I've got 4 groups.
Groups 1 and 2 are small groups made of friends and we handle everything over text. We do tend to have a lot of "hey, are we playing today?" texts on the day of.
Group 3 started as a work game and has a larger group with less consistency of who shows up week to week. We use discord. Creating events, hosting lore, and places to stash special/homebrew rules is nice.
Group 4 is a west marches-ish game with about 10 players. Discord for that also, though once a group is set for a couple sessions we switch from the discord channel to a group message for communication.
I've used Teams in the past as well but I find discord to be better for managing the various things I need to organize a game.
WhatsApp to coordinate.
Discord for voice chat and sharing links etc.
Foundry for play.
Miro for "clue board" when playing investigative games.
