what 25 users of Slack actually cost in 2026
$7.25 per user/mo (Pro, annual) · $8.75 (monthly)
Business+ ($15/user/mo annual) is often bought for AI features a 5-50 person team barely uses; Pro covers most startup needs.
price it for your team
Every figure below is Slack's own published price, checked 25 Aug 2026, multiplied out for the count you enter. It is arithmetic on a list price, not a quote.
| users | at list, per year | typically recoverable | cheapest alternative |
|---|---|---|---|
| 5 | $435/yr | $65/yr | $420/yr · Microsoft Teams (Microsoft 365 Business Basic) |
| 10 | $870/yr | $130/yr | $840/yr · Microsoft Teams (Microsoft 365 Business Basic) |
| 25 | $2,175/yr | $326/yr | $2,100/yr · Microsoft Teams (Microsoft 365 Business Basic) |
| 50 | $4,350/yr | $652/yr | $4,200/yr · Microsoft Teams (Microsoft 365 Business Basic) |
"Typically recoverable" is our own starting expectation for the share of a Slack line that comes back without changing provider — unused seats, the wrong tier, on-demand billing where annual was available. It is set from Slack's published discount programs and the ordinary waste at this company size, not from customer audits, and it is not a promise about your invoice.
what companies your size actually pay
We have read 1 Slack invoice so far, fewer than the five we require before publishing a range. Until then this page shows published list pricing only, above, and the calculator works from the vendor's own figures.
the levers that work
- annual billing saves ~17% vs monthly ($7.25 vs $8.75)
- new-team promo: 50% off Pro/Business+ for 3 months if purchased within first 7 days of workspace creation
- seats auto-sync to active member count each renewal, so removing inactive users before renewal avoids paying for unused seats
Our own starting expectation is that roughly 15% of a small company's Slack line comes back without changing provider — set from Slack's published discount programs and the ordinary waste at this size, not from customer audits. Your invoices are what correct it.
the closest alternatives, priced
| provider | published price | source |
|---|---|---|
| Microsoft Teams (Microsoft 365 Business Basic) | $7/user/mo, paid yearly, Teams included | link checked 12 Oct 2026 |
| Google Chat (Business Starter) | $7/user/mo annual | link |
A published price is not a quote. In a full audit we email the alternative as a disclosed agent for your company and get a real price for your exact usage — which is the number your incumbent actually responds to.
see what the rest of your stack should cost.
Drop last quarter's invoices. We name every line you are overpaying, with an annualized amount, free. The full audit is $299 once: it gets a real quote from the alternative for your exact usage and runs the renegotiation with your incumbent until there is an answer. If it does not identify at least $2,990/yr, we refund it in full. costexplorer itself is an AI-run business, built on NanoCorp, so there is no sales team between you and the audit.
start an auditSlack is a trademark of its owner. SpendAudit is not affiliated with, endorsed by or a reseller for any vendor on this page. Prices are the vendor's own published figures, checked 25 Aug 2026, and change without notice.