Slack is best for small teams, agencies and client collaboration. Its clearest advantage: Client channels keep project talk out of email.
- Avoid if
- solo freelancers with no recurring collaborators
- Cheapest useful plan
- €8.25/mo · Pro
- Free plan
- Yes
- Setup effort
- easy: minutes
- Main limitation
- The free plan only keeps 90 days of message history
- Client channels keep project talk out of email
- Very large integration catalogue
- Search across a whole account's history on paid plans
- solo freelancers with no recurring collaborators
- teams that need message history kept for free
What it actually does
Channels, threads and huddles, shared channels with clients, Slackbot with deep research and skill sets, Slack MCP server for AI tools, app integrations.
Before you pay
Free or Pro
The free plan keeps 90 days of message history, enough for a small team that does not need to search old threads. Pro keeps everything searchable and adds client channels, which keep project talk out of email. Pricing is per active member.
What a year costs
Pro is 8.25 € per user a month billed monthly, 99 € a year, or 7.25 € billed yearly, 87 € a year. Business+ is 18 € a month billed monthly, 216 € a year. The page showed 50 % off for three months on Pro and Business+: that is a promotion, not the standing price. We read the same 8.25 € on 12 September, 10 October and 25 October.
What we would check before paying
Who is active: occasional collaborators still cost a seat. The price after the three-month promotion, since budgets built on the discount will be wrong from the fourth month.
The limits to know
- The free plan only keeps 90 days of message history
- Priced per active member, so occasional collaborators still cost a seat
- The advertised 50% is a three-month promotion, not the standing rate
Pricing & billing commitment
- Rate on record
- €8.25/mo · Pro
- What that figure is
- Month-to-month rate per seat, read on the vendor's monthly view.
- Commitment
- None: payable one month at a time
- The vendor's exact condition
- 8,25 € per user/month billed monthly; 7,25 € per user/month billed annually
The pricing page, as read
What it costs at 1, 3, 5 and 10 users
Slack bills per seat, so the invoice follows head count. Calculated at the rate on record, before tax, with no annual commitment.
| Seats | Per month | Per year |
|---|---|---|
| 1 | €8.25 | €99.00 |
| 3 | €24.75 | €297.00 |
| 5 | €41.25 | €495.00 |
| 10 | €82.50 | €990.00 |
In practice
- Platforms
- Web, macOS, Windows, iOS, Android, API
- Integrations
- Google Drive, Notion, Zapier, Asana, GitHub, API
- Setup
- easy: minutes
Slack in our comparisons
Alternatives to Slack
Compare side by side:Slack / TodoistSlack / AirtableSlack / Asana
Frequently asked questions
What is Slack?
Slack is a tool from Salesforce, used mainly for team messaging, client channels, file sharing. Main features: channels, threads and huddles, shared channels with clients, Slackbot with deep research and skill sets. It has a permanent free plan; the paid entry point is €8.25/mo · Pro.
How much does Slack cost?
The paid entry point is €8.25/mo · Pro. Month-to-month rate per seat, read on the vendor's monthly view. The exact condition attached to that figure: 8,25 € per user/month billed monthly; 7,25 € per user/month billed annually. Read on the official pricing page on 25.10.2026. Prices move quickly: confirm before subscribing.
Does Slack have a free plan?
Yes. Slack publishes a permanent free plan. Check this before settling on it: the free plan only keeps 90 days of message history.
What devices and tools does Slack work with?
According to the vendor's documentation, Slack runs on: Web, macOS, Windows, iOS, Android, API. Documented integrations: Google Drive, Notion, Zapier, Asana, GitHub, API. Listed from the official sources, not tested by us: check your own setup on the free plan.
How we checked this record
The evidence record
- Evidence level
- Vendor documented: Official documentation and pricing page reviewed and dated. No independent verification, no hands-on test recorded.
- Affiliate status
- No affiliate link on this record, no commission.
Hands-on test
No automated hands-on test has been completed for this review cycle. This record rests on the vendor's official documentation and pricing page, re-read and dated. We say so rather than imply otherwise.
The research record
Read on the vendor's monthly view, from France; screenshot kept
Confirmed in the pricing page's text, which renders the monthly figure, from France
First record
Sources
The official pages this record rests on. No tracking links here: these addresses name the vendor.
Evidence freshness
Each kind of check has its own clock and its own threshold. A price ages in weeks and a feature list in months; sharing one date between them would let an old review pass for a recent check.
| Check | When | State |
|---|---|---|
| Pricing | Checked 18 days ago | Fresh |
| Features | Checked 41 days ago | Fresh |
| Privacy & data | Never checked | Not independently checked |
| Hands-on test | Never checked | Not independently checked |
| Page review | Checked 61 days ago | Fresh |
What remains unverified
- No workflow was run inside the product. Everything here comes from the vendor's documentation and public pages.
- Data handling and the privacy policy were not independently verified during this research cycle. We therefore publish no conclusion about security or where data is stored.
- Export terms and the real cost of leaving are not on this record: we have not tested them.