Mattermost vs Lark
Mattermost is open-source, self-hosted team messaging platform for organizations that need data sovereignty, while Lark is integrated workspace combining messaging, video, docs, and project management from ByteDance. Mattermost is open source and can be self-hosted, giving you full control over your data. Mattermost is built for teams that need self-hosted, privacy-first messaging, whereas Lark targets teams wanting an all-in-one collaboration suite.
Free
| Feature | Mattermost | Lark |
|---|---|---|
| Free tier available | ✓ | ✓ |
| Open source | ✓ | — |
| Calendar | — | ✓ |
| Channels | ✓ | — |
| Compliance | ✓ | — |
| Docs | — | ✓ |
| Integrations | ✓ | — |
| Messenger | — | ✓ |
| OKRs | — | ✓ |
| Playbooks | ✓ | — |
| Self-Hosted | ✓ | — |
| Video | — | ✓ |
Pricing: Both Mattermost and Lark are free. You can try both without spending a dollar.
Feature gaps: Mattermost offers Channels, Compliance and Integrations that Lark lacks. Lark brings Calendar, Docs and Messenger that Mattermost does not have.
Team fit: Mattermost is geared toward mid-size teams teams, while Lark is aimed at any size teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.
Open source: Mattermost is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. Lark is proprietary — you are trusting the vendor with your data and uptime.
Where each tool shines: Mattermost's biggest strengths are: self-hosted — full control over your data. open source with active community. Lark's biggest strengths are: includes messenger as a core feature, purpose-built for team communication workflows. includes video as a core feature, purpose-built for team communication workflows.
Watch out for: With Mattermost, users commonly note that requires server management if self-hosting. With Lark, the main complaint is that free plan exists but key features are locked behind the paid upgrade.
choose Mattermost if
- Your profile matches its sweet spot: teams that need self-hosted, privacy-first messaging
- You need self-hosting, data sovereignty, or the ability to audit source code
- You specifically need Channels and Compliance
- You care about open source with active community
- Your team size fits the mid-size teams profile Mattermost is designed for
choose Lark if
- Your profile matches its sweet spot: teams wanting an all-in-one collaboration suite
- You specifically need Calendar and Docs
- You care about includes video as a core feature, purpose-built for team communication workflows
- Your team size fits the any size profile Lark is designed for
- The free tier works for you: free for up to 50 users
frequently asked
What is the difference between Mattermost and Lark?
Mattermost is open-source, self-hosted team messaging platform for organizations that need data sovereignty, while Lark is integrated workspace combining messaging, video, docs, and project management from ByteDance. Mattermost is open source and can be self-hosted, giving you full control over your data. Mattermost is built for teams that need self-hosted, privacy-first messaging, whereas Lark targets teams wanting an all-in-one collaboration suite.
Should I use Mattermost or Lark?
Mattermost gives you open source and self-hosting; Lark is a managed service. Which trade-off works for you?
When should I choose Mattermost over Lark?
Choose Mattermost if Your profile matches its sweet spot: teams that need self-hosted, privacy-first messaging; You need self-hosting, data sovereignty, or the ability to audit source code; You specifically need Channels and Compliance; You care about open source with active community; Your team size fits the mid-size teams profile Mattermost is designed for.
When should I choose Lark over Mattermost?
Choose Lark if Your profile matches its sweet spot: teams wanting an all-in-one collaboration suite; You specifically need Calendar and Docs; You care about includes video as a core feature, purpose-built for team communication workflows; Your team size fits the any size profile Lark is designed for; The free tier works for you: free for up to 50 users.
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