AppFlowy
Mattermost
| Feature | AppFlowy | Mattermost |
|---|---|---|
| Pricing | Free / from $12.5/mo | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.2 / 5 |
| Best For | privacy-focused-teams, open-source-enthusiasts, notion-alternatives, self-hosters | devops-teams, security-conscious-orgs, government, enterprise |
| Founded | 2021 | 2015 |
| Documents | ✓ | ✗ |
| Databases | ✓ | ✗ |
| Kanban | ✓ | ✗ |
| Calendar View | ✓ | ✗ |
| Ai Assistant | ✓ | ✗ |
| Self Hostable | ✓ | ✗ |
| Offline Mode | ✓ | ✗ |
| Messaging | ✗ | ✓ |
| Channels | ✗ | ✓ |
| Playbooks | ✗ | ✓ |
| Integrations | ✗ | ✓ |
| Self Hosting | ✗ | ✓ |
| Compliance | ✗ | ✓ |
✓ AppFlowy Pros
- Open-source with full self-hosting option
- Familiar Notion-like interface and features
- Local-first with offline support
- AI features powered by multiple models
✗ AppFlowy Cons
- Less mature than Notion with fewer integrations
- Template library is limited
- Collaboration features still developing
✓ Mattermost Pros
- Self-hostable
- Open source
- DevOps integrations
- Secure
✗ Mattermost Cons
- Smaller ecosystem
- Fewer integrations than Slack
- Self-hosting complexity
The Verdict
AppFlowy is built for privacy focused teams and open source enthusiasts, with a focus on documents and databases. Mattermost targets devops teams and security conscious orgs and leads with messaging and channels.
Pricing is close: Mattermost starts at $10/mo versus $12.5/mo for AppFlowy — not a deciding factor on its own.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, AppFlowy offers broader built-in capabilities (7 features vs 6), while Mattermost takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.