vioscaleAI
Collaboration SoftwareUnclaimed

Slack

Unified workplace communication and automation platform

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Also known as
slack

Available worldwide

What is Slack?

A work operating system that combines messaging, workflow automation, and app integrations to enable team communication, process documentation, and knowledge sharing with enterprise security.

Independently observed

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.

Pricing as of verify at live pricing ↗Independently observed
from £5.75/moSubscriptionFree tier

From £0 (free tier) to £7/user/month (Pro). Free tier available.

Free

Free
Free

A 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

£7/user/month (£5.75/user/month billed annually)

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.

Modality
Messaging
✓
Video meetings
✓
Whiteboard
-
Meetings
Screen sharing
-
Recording / transcription
Recording + AI notes
Security
End-to-end encryption
-
SSO / SCIM
✓
Access
Guest / external access
✓
Compliance
Compliance controls
✓
Deployment
Hosting
Cloud only
Scale
Max participants
-
Ecosystem
App marketplace
✓
Public API / bot framework
✓
Commercial
Free tier
-
Independently observed

Platform & deployment

Independently observed
Platforms
  • iOS
  • Web
Deployment
  • Cloud / SaaS

Integrations (15)

Independently observed
project_management
  • Jira•
engineering
  • GitHub•
authentication
  • Google Workspace←•
  • Okta←•
  • ADFS←•
  • Salesforce
  • Atlassian
  • Lucid
  • Loom
  • Miro
  • Smartsheet
  • Mural
  • Zapier
  • Microsoft 365•
  • Zendesk•

Slack FAQ

Common questions about Slack, answered from independent, dated evidence.

What is Slack?

A work operating system that combines messaging, workflow automation, and app integrations to enable team communication, process documentation, and knowledge sharing with enterprise security. It is indexed under Collaboration Software.

Source: https://slack.com

Is Slack free?

Slack offers a free tier, so you can start without paying. Paid plans start at £5.75 per user per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.

Source: https://slack.com

What platforms does Slack support?

Slack supports the web and iOS. Platforms we have not confirmed are simply not listed here rather than ruled out.

Source: https://slack.com

Can Slack be self-hosted?

We have only confirmed a cloud / SaaS deployment for Slack, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.

Source: https://slack.com

What does Slack integrate with?

We have confirmed 15 integrations for Slack, including Salesforce, Atlassian, Lucid, Loom, Miro, Smartsheet, Mural and Zapier, plus 7 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.

Source: https://slack.com

What security certifications does Slack have?

We have independently confirmed GDPR for Slack. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Slack not holding them. Always confirm compliance directly before you rely on it.

Source: https://slack.com/security

Slack alternatives

Other collaboration software we track, ranked by the same independent score.

All Slack alternatives, ranked →

Compare Slack

Side by side against other collaboration software, attribute by attribute, with a source on every value.

Independent · unbought · dated

The vioscaleAI 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.

Balanced composite 79 / 100
medium · 54%
Signal contributions to the composite score
SignalScoreWeightContributionEvidence
Pricing transparency1000.088.4✓
Integrations980.054.7✓
Price level800.054.2✓
Capabilities1000.044.0✓
Reliability500.063.2✓
Security posture100.060.0-

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.

Content

AttributeValueEvidence
Faq6 itemsmediumsource · 2026-09-10 · 62%

Features

AttributeValueEvidence
CapabilitiesHosting: cloud · Sso scim: Yes · Messaging: Yes · Api access: Yes · Video meetings: Yes · App marketplace: Yesmediumsource · 2026-09-07 · 60%

Integrations

AttributeValueEvidence
Count2,500mediumsource · 2026-08-14 · 60%

Market

AttributeValueEvidence
AvailabilityPrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: …highsource · 2026-08-14 · 75%

Pricing

AttributeValueEvidence
Modelcommercialmediumsource · 2026-08-05 · 60%
Free tierYesmediumsource · 2026-08-05 · 60%
TransparentYesmediumsource · 2026-08-05 · 60%
Price levellowmediumsource · 2026-08-05 · 60%

Reliability

AttributeValueEvidence
Status pageYesmediumsource · 2026-08-05 · 60%

Security

AttributeValueEvidence
Disclosure policyYesmediumsource · 2026-09-07 · 60%
GdprYeshighsource · 2026-08-05 · 75%
Trust centerhttps://slack.com/blog/collaboration/security-at-slack-how-slack-protects-your-datamediumsource · 2026-09-07 · 60%
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For the makers of Slack

Is this your product?

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