💭Team Chat, No Seat Count

Slack is real-time team chat with channels, threads, direct messages, file sharing and a large integration ecosystem.

// TAKE · Mattermost is the closest fit for engineering teams and the safest self-hosted bet, with the compliance controls and integrations to match. Zulip's threading model is genuinely better than Slack's for high-volume discussion but takes adjusting to, while Rocket.Chat casts a wider net with voice, video and omnichannel support at the cost of a heavier install.

Microsoft Teams combines persistent team chat, video meetings, file sharing and app integration inside the Microsoft 365 ecosystem.

// TAKE · No single project covers Teams, so the practical build is Mattermost or Rocket.Chat for chat, Jitsi Meet for video and Nextcloud for files and documents. Mattermost is the steadier choice for regulated or air-gapped deployments, Rocket.Chat ships more features out of the box, and Zulip's threading beats both if your channels drown in noise.

Discord is a chat platform built around servers, persistent text and voice channels, screen sharing and community moderation.

// TAKE · Stoat is the closest to Discord's model of public servers, channels and fine-grained roles, and Fluxer covers similar ground with voice and video included. Rocket.Chat is the most battle-tested option and the easiest to run at scale, but it is shaped like a workplace tool rather than a community hangout, and Cinny is only a client, so you still have to run a Matrix server behind it.

Twist is asynchronous team messaging built around threaded, topic-based conversations rather than real-time chat channels.

// TAKE · Zulip is the obvious answer, since its topic-per-thread model is the same bet Twist makes about async work and it is far better than Slack-style tools at catching up after a day away. Mattermost and Rocket.Chat are more capable platforms overall, with better mobile clients and enterprise features, but they are real-time chat first and threading is bolted on.

Chanty is a team chat app for small teams, with channels, direct messages, voice calls and built-in task management.

// TAKE · Mattermost is the closest fit, giving you Chanty's straightforward channel-and-DM model on a server you control, while Rocket.Chat adds voice, video and omnichannel support at the cost of a heavier stack to operate. Campfire is the least work to run if all you need is rooms and DMs, and Zulip suits teams that would rather read threaded topics than scroll a busy channel.

Pumble is a team chat app with channels, direct messages, threads, file sharing and voice and video calls.

// TAKE · Mattermost is the closest drop-in, with the channel and thread model teams expect plus serious self-hosting and compliance options. Rocket.Chat casts a wider net across omnichannel and customer messaging, Zulip's topic-based threading is genuinely better for busy teams but takes some unlearning, and Campfire is the minimal option for a small server.

Zoho Cliq is team chat for the Zoho suite, with channels, direct messages, bots, calls and workflow integrations.

// TAKE · Mattermost and Rocket.Chat both cover Cliq's channels, DMs and app integrations; Mattermost is the steadier self-hosted choice for regulated teams, Rocket.Chat the broader one thanks to omnichannel and customer-facing chat. Zulip is worth a look if your team reads chat asynchronously, since its topic threading beats anything Cliq offers.

Guilded is a Discord-style community chat with voice channels, forums, event calendars and scheduling for gaming groups.

// TAKE · Stoat is the closest in shape, built around community servers with text channels, roles and fine-grained permissions rather than workplace teams. Fluxer covers similar ground with voice and video, while Rocket.Chat and Mattermost are far more mature but are designed for companies, so you get compliance and integrations instead of anything resembling a community hangout.