Mattermost
Voiceflow
| Feature | Mattermost | Voiceflow |
|---|---|---|
| Pricing | Free / from $10/mo | Free / from $50/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.2 / 5 | 4.4 / 5 |
| Best For | devops-teams, security-conscious-orgs, government, enterprise | product-teams, conversation-designers, agencies, enterprise-companies |
| Founded | 2015 | 2019 |
| Messaging | ✓ | ✗ |
| Channels | ✓ | ✗ |
| Playbooks | ✓ | ✗ |
| Integrations | ✓ | ✗ |
| Self Hosting | ✓ | ✗ |
| Compliance | ✓ | ✗ |
| Visual Designer | ✗ | ✓ |
| Knowledge Base | ✗ | ✓ |
| Api Steps | ✗ | ✓ |
| Variables | ✗ | ✓ |
| Prototyping | ✗ | ✓ |
| Analytics | ✗ | ✓ |
✓ Mattermost Pros
- Self-hostable
- Open source
- DevOps integrations
- Secure
✗ Mattermost Cons
- Smaller ecosystem
- Fewer integrations than Slack
- Self-hosting complexity
✓ Voiceflow Pros
- Best-in-class visual conversation designer
- Team collaboration built in
- Powerful API step for custom logic
- Knowledge base with RAG support
✗ Voiceflow Cons
- Expensive for solo builders
- Learning curve for advanced features
- Limited built-in channel integrations
The Verdict
Mattermost is built for devops teams and security conscious orgs, with a focus on messaging and channels. Voiceflow targets product teams and conversation designers and leads with visual-designer and knowledge-base.
On pricing, Mattermost is the clear winner for budget-conscious users — starting at $10/mo compared to $50/mo for Voiceflow. That $40/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
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.