#1 · match 85/100
Mattermost
Mattermost — often a stronger value alternative.
Open source
Cheaper than Slack Pro
Team chat (paid history/features).
Typical price: $7.25/mo · checked 2026-07-27
Top ranked: Mattermost (free) · save ~$87/yr
Top alternatives (closest match + price)
#2 · match 82/100
Rocket.Chat
Rocket.Chat — often a stronger value alternative.
Self-host
#3 · match 80/100
Zulip
Zulip — often a stronger value alternative.
FOSS chat
#4 · match 70/100
Discord Free
Discord Free — often a stronger value alternative.
Free communities
Quick comparison
| Alternative | Price | Match | Est. savings | |
|---|---|---|---|---|
| Slack Pro (paid) | $7.25/mo | — | — | |
| Free | 85 | $87/yr | Open | |
| Free | 82 | $87/yr | Open | |
| Free | 80 | $87/yr | Open | |
| Free | 70 | $87/yr | Open |
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FAQ — Slack Pro alternatives
What is the best free alternative to Slack Pro?
Mattermost is ranked #1 free/cheap match for Slack Pro on CheaperThan (match score 85).
How much can I save switching from Slack Pro?
Compared with Slack Pro's listed price, top alternative Mattermost can save about $87 per year (approximate; verify current vendor pricing).
Are cheaper alternatives as good as Slack Pro?
Match scores estimate feature/use-case fit, not perfection. Always trial free tiers before migrating critical work.
How do I list my product as an alternative to Slack Pro?
Use List your tool ($9–$49 via PayPal) or Submit for free moderation. Paid placements get faster visibility next to switch-intent searches.
Is your tool a better Slack Pro alternative?
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