We've compared 2 tools across pricing, features, ratings, and reviews to help you make an informed decision. No paid placements — just facts.
Compare different tools →| Feature | M Mattermost Communication & Chat |  Missive Communication & Chat |
|---|---|---|
| Rating | No reviews yet | No reviews yet |
| Pricing | Free as of Sep 15, 2026 |
as of Sep 8, 2026 |
| Pricing Model | Contact Sales | Free Trial |
| Free Plan | ||
| Free Trial | Yes |
| Yes |
| API Available |
| Verified |
| Founded | 2016 | — |
| HQ | Palo Alto, CA | — |
| Team Size | 201-500 | Small Business, Enterprise |
| Platforms | WebiOSAndroidMac+3 more | — |
| Top Integrations | MS TeamsAtlassianGitLabPexip+1 more | StripeMCPCRM |
| Key Features |
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| Description | Mattermost is the open-source platform for secure, high-trust collaboration. Used by NASA, Airbus, and the US Department of Defense, Mattermost provides Slack-like collaboration with on-premises deployment for security-conscious teams. | Missive is a shared-inbox and team collaboration app that layers internal discussion, task assignment, and shared team spaces on top of email (plus text and other channels) so teams always know who's handling what. It's built for small-to-midsize teams in customer-facing operations — support, sales, real estate, e-commerce, accounting, and professional services — that outgrow forwarding and CC'ing. What most sets it apart is that internal comments, tasks, tags, and statuses live directly inside the emails themselves, and its AI assistant pulls real context from connected tools like Stripe or a CRM via MCP rather than acting as a generic sidebar. |
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