Choose Lark if you need
- Integration with Exchange, Outlook or Google Calendar. We haven't found them on Mattermost's website.
- SOC 2, ISO 27001 or GDPR. We haven't found them on Mattermost's website.
At a glance
- Lark has a free plan. We haven't confirmed one for Mattermost.
- Mattermost offers a free trial (length not stated). We haven't confirmed one for Lark.
- Lark's lowest paid plan is Basic at $6 per user per month, as of October 28, 2026.
- Both are available on iOS.
- Only Mattermost lists Web, Windows, macOS, Linux, Android and API.
- They list no integrations in common.
- Both list SSO.
- Only Lark lists SOC 2, ISO 27001 and GDPR.
- Both have a public API.
- Mattermost can be self-hosted. We haven't confirmed that for Lark.
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, Windows, macOS, Linux, Android or API. We haven't found them on Lark's website.
- Integration with GitHub, GitLab or Jira. We haven't found them on Lark's website.
Lark
Nobody has reviewed Lark yet. Its rating shows once it has 3 reviews.
Review Lark
Mattermost
Nobody has reviewed Mattermost yet. Its rating shows once it has 3 reviews.
Review MattermostThe facts
- What it does
- LarkLark is a productivity superapp for teams with chat, docs, meetings, workflow automations and AI.
- MattermostZero-trust collaboration, automation and AI in private cloud, self-hosted, and air-gapped environments
- Free plan
- LarkYes
- MattermostNot confirmed
- Pricing
- LarkPer user, monthly
- MattermostNot confirmed
- Paid plans from
What they share
From the platforms and integrations each website lists.
Platforms
Both
- iOS
Only LarkNothing else listed
Only Mattermost
- Web
- Windows
- macOS
- Linux
- Android
- API
Integrations
BothNone in common
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Lark and Mattermost yet.
Used either of them?
Your review makes this comparison better for the next person. Review Lark or review Mattermost.