Available worldwide · Popular in: GB, US
What is Slack?
Slack is a cloud-based messaging and collaboration platform that enables teams to communicate, organize work, and integrate with tools across a unified workspace. Built-in AI capabilities and an extensive app ecosystem support businesses of all sizes.
Slack pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
From £0 (free tier) to £7/user/month (Pro). Free tier available.
Free
FreeA simpler way to chat and collaborate
- apps
- up to 10
- message_history
- 90 days
- 90 days of message history
- Up to 10 apps from Slack App Directory
- 1:1 audio and video meetings with screen sharing
- 1:1 external messages via Slack Connect
- SAML-based single sign-on
- SCIM user management
- EMM integration support
- Native data loss prevention
- AI conversation summaries
- Slackbot personal AI agent
- AI workflow generation
- AI search
- AI daily recaps
- AI file summaries
Pro
Drive productivity in one place
- Unlimited message history
- Unlimited app integrations
- 2,600+ apps in Slack App Directory
What Slack does
The capabilities that matter for collaboration software, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Messaging
- ✓
- Video meetings
- ✓
- Whiteboard
- -
- Screen sharing
- ✓
- Recording / transcription
- -
- End-to-end encryption
- -
- SSO / SCIM
- ✓
- Guest / external access
- ✓
- Compliance controls
- ✓
- Hosting
- Cloud only
- Max participants
- -
- App marketplace
- ✓
- Public API / bot framework
- ✓
- Free tier
- ✓
Platform & deployment
Independently observed- iOS
- macOS
- Web
- Android
- Windows
- Cloud / SaaS
Integrations (4)
Independently observed- Salesforce
- Jira
- Google Drive
- ChatGPT
Slack alternatives
Other collaboration software we track, ranked by the same independent score.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Slack, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 96 | 0.19 | 18.0 | ✓ |
| Integrations | 98 | 0.10 | 10.3 | ✓ |
| Pricing Transparency | 100 | 0.09 | 9.4 | ✓ |
| Price Level | 80 | 0.06 | 4.6 | ✓ |
| Reliability | 50 | 0.07 | 3.5 | ✓ |
| Security Posture | 10 | 0.07 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | {"hosting":"cloud","sso_scim":true,"free_tier":true,"messaging":true,"api_access":true,"screen_sharing":true,"video_meetings":true,"app_marketplace":true,"compliance_controls":true,"guest_external_access":true} | mediumsource · 2026-08-05 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 2,600 | mediumsource · 2026-08-05 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | {"primaryMarkets":["GB","US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]} | highsource · 2026-08-05 · 75% |
Pricing
Reliability
| Attribute | Value | Evidence |
|---|---|---|
| Status page | Yes | mediumsource · 2026-08-05 · 60% |