Mattermost

Team communication and collaboration platform

Alternative to: Slack, Microsoft Teams, Discord

Available in:

business

Mattermost is the AI-powered collaborative workflow for defense, intelligence, security & critical infrastructure enterprises.

Be the first to deploy — join the WinterFlow early access list.

Email address

We'll send early access invites when it's ready, along with occasional product updates — no spam, ever.

WinterFlow.io — Fresh look at Self-Hosting.

Be the first to deploy your apps — join the WinterFlow waiting list.

Email address

We'll send early access invites when it's ready, along with occasional product updates — no spam, ever.

Get early access to our Business Plan with collaboration features, team apps, and advanced management capabilities.

Email address

We'll notify you when Business Plan becomes available, plus occasional updates about team features.

I'm interested in participating in a user interview

Help us build better team features by sharing your workflow and needs (optional, 15-30 min call)

Skip the server setup entirely. We'll provide fully managed infrastructure so you can deploy apps instantly.

Email address

No spam, just early access invites and product updates.

Let us know what app you're looking for and we'll consider adding it to our catalog.

What app are you looking for?

Tell us about the app you need - its name, features, or any other details that would help us find or add it.