Side-by-side
Mattermost vs Slack
Pricing, founders, indie status and curated alternatives compared from our directory — all data points sourced from each tool's public site or press materials.
At a glanceMattermostSlack
At a glance
- Pricing
- Mattermost$10/seat/mo
- Slack$8.75/seat/mo (Pro)
- Pricing model
- MattermostFreemium
- SlackFreemium
- Founded
- Mattermost—
- Slack2009
- Location
- Mattermost—
- Slack—
- Bootstrapped
- Mattermost—
- Slack—
- Open source
- MattermostYes
- Slack—
- Category
- Mattermost—
- SlackTeam Communication
- Indie alternatives
- Mattermost0
- Slack5
- Founders
- MattermostIan Tien
- SlackStewart Butterfield
Key differences
Pricing
Slack starts cheaper at $8.75/seat/mo (Pro); Mattermost starts at $10/seat/mo.
Funding
Mattermost is bootstrapped / open source; Slack is venture-backed.
Open source
Mattermost is open source; Slack is closed source.
Indie alternatives
Mattermost has 0 curated indie alternatives in our directory; Slack has 5.
Differences are derived directly from the data on each tool's page. Empty fields mean we haven't verified a value yet — never that one tool lacks the capability.
Founder of Mattermost
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