kitio.aiSlack AI vs Mattermost
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Slack AI starts at See pricing page and Mattermost starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Channel and thread summaries
- Slackbot assistant
- Enterprise search
- Huddle notes
- Message translation
- Agentforce agents
- Channel-based messaging
- Workflow automation
- Agentic platform
- Air-gapped deployment
- Integrations platform
- Incident response playbooks
| Feature | Slack AI | Mattermost |
|---|---|---|
| Best for | AI built into Slack for summaries, search, notes and translation | Self-hosted team chat with workflows and AI for secure networks |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | Salesforce | Mattermost |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
Slack AI starts at See pricing page and Mattermost starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- 90-day message history
- Basic channels and huddles
Pro
₹294.75/user/mo
- Per user
- Unlimited message history
- Unlimited app integrations
Business+
₹668.25/user/mo
- Per user
- AI-powered work features
Enterprise+
Contact sales
- Enterprise-grade AI
- Large-scale admin
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Slack AI
- Works where the team already talks
- Searches across connected apps
- Large app marketplace
- Best AI features need Business+ or higher
- Priced per user, which adds up
- Free plan limits history to 90 days
Mattermost
- Runs on your own infrastructure
- Works in air-gapped environments
- Built-in workflow automation
- Paid tiers need a sales conversation
- Aimed at regulated and security-focused teams
- Free edition is limited to evaluation
Which one should you choose?
Choose Slack AI if you want:
- Works where the team already talks
- Searches across connected apps
- Large app marketplace
Watch out: best ai features need business+ or higher.
Choose Mattermost if you want:
- Runs on your own infrastructure
- Works in air-gapped environments
- Built-in workflow automation
Watch out: paid tiers need a sales conversation.
Slack AI vs Mattermost FAQ
What is the difference between Slack AI and Mattermost?
Slack AI: AI built into Slack for summaries, search, notes and translation. Mattermost: Self-hosted team chat with workflows and AI for secure networks. Both are productivity tools.
Is Slack AI or Mattermost cheaper?
Slack AI starts at See pricing page and Mattermost starts at See pricing page. Check both pricing pages for current plans.
Do Slack AI and Mattermost have free plans?
Slack AI: Yes. Mattermost: Yes.
Who makes Slack AI?
Slack AI is made by Salesforce, based in United States.
Who makes Mattermost?
Mattermost is made by Mattermost, based in United States.
Which should I choose, Slack AI or Mattermost?
Choose Slack AI if you value works where the team already talks and searches across connected apps. Choose Mattermost if you value runs on your own infrastructure and works in air-gapped environments.