Where your team
actually talks
Channels, threads, calls, and files in one place. One login, no per-user cost, on your own EU server.
Every topic gets
its own thread
Keep the main channel readable. Replies, reactions, and files stay together in a thread your team can catch up on later, without scrolling past everything else. Follow a thread to hear about new replies, or mute it when you are done.
Share files, images,
and video inline
Drag in a mockup, a PDF, or a screen recording. Previews render right in the conversation: images and videos open in a viewer you can swipe through, and PDFs in a built-in reader, on the phone too. Every channel keeps its files together, so they are easy to find again.
Search that finds
the message
Full-text search across every channel and DM you are in, with exact phrases and words to leave out. Jump to any message, channel, or person with ⌘K (Ctrl+K on Windows and Linux), without lifting your hands off the keyboard.
Talk it out,
face to face
Drop into a voice channel for the standup, or start a video call with screen sharing from any conversation. No plugins, no separate app, no extra login.
Everything a conversation needs
The small things that make a chat app feel like home.
React without a reply
A quick emoji says “got it” without cluttering the channel. Hover to see everyone who reacted, or tap on your phone.
Catch every mention
@-mentions, unread counts and a notification level per channel bring you straight to what actually needs you.
Links unfurl in place
Paste a URL and the title, description, and preview image render right in the conversation.
On every device
Desktop apps for Mac, Windows and Linux, an iPhone app, an Android app you install straight from us, plus the web. On the desktop and iPhone the unread count follows you onto the app icon.
Pipe in your tools
Webhooks post deploys, alerts, and form submissions straight into the right channel.
No per-seat pricing
Add your staff, and bring clients in as guests who only see the channels you invite them to. One price for the whole workspace.
Drafts that follow you
Start a message on your laptop and finish it on your phone. Unsent drafts are kept per channel and thread, and the web app lists them all in one place.
Ask Reda in the channel
With the AI app installed, type @ai and Reda answers in a thread, on the asking person's own AI account.
Bring your Slack history
Moving from Slack? Public channels and their threads come along from a Slack export, with every file that is still on Slack, and custom emoji when the export includes an emoji.json.
Your team's conversations,
on your own server
No per-user pricing, and your messages, files and calls stay on your own server. Phone notifications are the exception: their text passes through Nordkastell's push relay and Apple or Google to reach the phone. Link previews fetch the page you linked, and YouTube and Vimeo videos play from their own sites. Try Snacka in the live playground, no signup.