Choose Flock if you need
- Integration with Google Drive, Google Calendar or Trello. We haven't found them on Mattermost's website.
- SOC 2. We haven't found it on Mattermost's website.
At a glance
- Flock has a free plan. We haven't confirmed one for Mattermost.
- Both offer a free trial (Flock: 30 days, Mattermost: length not stated).
- Flock's lowest paid plan is Pro at $4.50 per user per month, billed annually, as of October 23, 2026.
- Both are available on macOS, Windows, Linux, iOS, Android and API.
- Only Mattermost lists Web.
- Both work with GitHub, Jira, GitLab and Zoom.
- Both list SSO.
- Only Flock lists SOC 2.
- Both have a public API.
- Mattermost can be self-hosted. We haven't confirmed that for Flock.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Mattermost if you need
- Web. We haven't found it on Flock's website.
Flock
Nobody has reviewed Flock yet. Its rating shows once it has 3 reviews.
Review Flock
Mattermost
Nobody has reviewed Mattermost yet. Its rating shows once it has 3 reviews.
Review MattermostThe facts
- What it does
- FlockOne shared space for all your cross-functional work
- MattermostZero-trust collaboration, automation and AI in private cloud, self-hosted, and air-gapped environments
- Free plan
- FlockYes
- MattermostNot confirmed
- Pricing
- FlockPer user, monthly
- MattermostNot confirmed
- Paid plans from
- Flock
What they share
From the platforms and integrations each website lists.
Platforms
Both
- macOS
- Windows
- Linux
- iOS
- Android
- API
Only FlockNothing else listed
Only Mattermost
- Web
Integrations
Both
- GitHub
- Jira
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Flock and Mattermost yet.
Used either of them?
Your review makes this comparison better for the next person. Review Flock or review Mattermost.