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Who uses Slack?

Collaboration workspace with messaging, shared documents and built-in AI assistance.

On usedby, 50 companies use Slack, including IBM, OpenAI, and Capital One. 19 of them are confirmed by a published case study, quote or press release. 11 of them declared it to usedby themselves. The largest group: Artificial Intelligence companies with up to 200 employees (10 companies). Every company links to the public page that names it.

35 public sources+11 in the last 30 days
See the 50 companiesCompareslack.com
CompareVisit slack.com
Customers

50 companies, each with its public proof

Strongest proof first. Open a company to see the page that names it, and when we captured it.

Companies that use Slack, with proof level, first public proof and source
CompanyIndustryProofFirst public proofSource
IBMIT Services & System IntegrationConfirmed—slack.com
OpenAIArtificial IntelligenceConfirmed—slack.com
Capital OneBanking & MortgagesConfirmed—slack.com
SpotifyStreaming & ContentConfirmed—slack.com
AnthropicArtificial IntelligenceConfirmed—slack.com
ParamountStreaming & ContentConfirmed—slack.com
RivianAutomotive ManufacturingConfirmed—slack.com
RokuStreaming & ContentConfirmed—slack.com
VercelDevTools & InfrastructureConfirmed—vercel.com
MuralDevTools & InfrastructureConfirmed—slack.com
BoxDevTools & InfrastructureConfirmed—slack.com
CJ Olive YoungRetailConfirmed—slack.com
FIFASports & FitnessConfirmed—slack.com
Gocertify—Confirmed—slack.com
IsometricEnergy, Utilities & CleantechConfirmed—slack.com
OneOncology—Confirmed—slack.com
RaycastWorkplace SoftwareConfirmed—slack.com
ShiptLogistics & Supply ChainConfirmed—slack.com
TargetRetailConfirmed—slack.com
Contextual AIArtificial IntelligenceDeclared—contextual.ai
DeepgramArtificial IntelligenceDeclared—deepgram.com
GleanArtificial IntelligenceDeclared—glean.com
PassionfruitArtificial IntelligenceDeclared—getpassionfruit.com
Prem AIArtificial IntelligenceDeclared—trust.prem.io
Read AIArtificial IntelligenceDeclared—trust.read.ai
RimeArtificial IntelligenceDeclared—rime.ai
TavilyArtificial IntelligenceDeclared—trust.tavily.com
MotionArtificial IntelligenceDeclared—usemotion.com
InkeepArtificial IntelligenceDeclared—inkeep.com
SiteGPTArtificial IntelligenceDeclared—sitegpt.ai
General MotorsAutomotive ManufacturingObserved—slack.com
IntuitFintech & PaymentsObserved—slack.com
VerizonTelecommunicationsObserved—slack.com
CanvaMarketing TechObserved—slack.com
LyftMobility & Ride-hailingObserved—slack.com
StripeFintech & PaymentsObserved—slack.com
WayfairE-commerce & D2CObserved—slack.com
PerplexityArtificial IntelligenceObserved—slack.com
RobinhoodFintech & PaymentsObserved—slack.com
AwayFashion & ApparelObserved—slack.com
Beast Industries—Observed—slack.com
EasyPark Group—Observed—slack.com
ezCaterRestaurants & Food ServicesObserved—slack.com
NOAA's National Weather ServiceGovernment & GovTechObserved—slack.com
NotionWorkplace SoftwareObserved—slack.com
PosthogData & AnalyticsObserved—slack.com
reMarkable—Observed—slack.com
Rocket CompaniesBanking & MortgagesObserved—slack.com
SlalomIT Services & System IntegrationObserved—slack.com
WriterMarketing TechObserved—slack.com
Showing 15 of 50.
Results

What customers say Slack changed

Figures and quotes as Slack and its customers published them, each tied to its source. We quote, we do not measure the result.

All 17 stories →
“Slack is a crucial enabler for our growth, bringing our people, processes, and data together in the flow of work.”
Sridhar ThatiVice President of Enterprise Technology and IT Infrastructure, Rivian
Named quote, captured Nov 13, 2026 · Source
“The ‘single pane of glass’ has always been the holy grail for CIOs: less toggling, less friction, and more focus. If people can stay in Slack and get 75-80% of their work done, the productivity lift across the enterprise is significant.”
Ravi MalickSVP and Global CIO, Box
Vendor case study · Read how Box uses Slack
“Slack allows our people to bring their authentic selves to work and build community. From automations to bots to integrations, it’s also a true developer’s platform. We absolutely love Slack.”
Varun KrishnaCEO, Rocket Companies
Named quote, captured Nov 13, 2026 · Source
more than an hour
time to compile the weekly Need to Know Monday
Mural
Read how Mural uses Slack
four to five hours
weekly time saved on media monitoring
Isometric
Read how Isometric uses Slack
an hour a week
People ops time saved by automating hiring updates
Gocertify
Read how Gocertify uses Slack
within minutes
time to raise and answer bugs in shared Slack
Raycast
Read how Raycast uses Slack
40%
increase in efficiency and productivity from teams
Spotify
Read how Spotify uses Slack
170
Slack Connect channels
OpenAI
Read how OpenAI uses Slack
24 to 48 hours
Turnaround time for genomic reports via the Slack
OneOncology
Read how OneOncology uses Slack
2,000
engineers onboarded to Slack in less than a month
Target
Read how Target uses Slack
Each figure is the vendor’s or the customer’s claim, quoted with its label. Latest capture Nov 12, 2026.12 of Slack’s 17 stories shown.
Where it’s used

Is Slack used in companies like yours?

By industry

20 industries among 50 customers. 28% are in Artificial Intelligence. Of the 35 with a known size, 57% have more than 1,000 employees.

By industry and company size
Customers of Slack by industry and company size
IndustryCustomers≤ 200201–1,000> 1,000Unknown
Artificial Intelligence1410022
DevTools & Infrastructure30210
Fintech & Payments30030
Streaming & Content30021

Employees per company. Every proof level counts, job posts included. A company with no stored size gets its own column, never counted as small.

Which Workspaces & project management tools companies use, by industry: Artificial Intelligence · DevTools & Infrastructure · Fintech & Payments · IT Services & System Integration · Marketing Tech · Retail

Before you buy

What Slack does, and what to check

What Slack does

Collaboration workspace with messaging, shared documents and built-in AI assistance.

Written by usedby from slack.com.

Security

  • ISO 27001
  • ISO 27017
  • ISO 27018
  • ISO 27701
  • ISO 42001
  • SOC 2 Type II

Pricing and terms

Pricing
Free: $0 free forever; Pro: $8.75 per user / month, when paying monthly; Business+: $18 per user / month, when paying monthly; Enterprise+: $45 per user / month, when paying annually
Data processing terms
A data processing agreement is available.
Free trial
Free trial or free plan available.

Integrations

  • Zoom
  • ChatGPT
  • Box
  • Asana
  • Claude
  • Salesforce
  • Notion
  • PagerDuty

Read on join.slack.com, checked Nov 13, 2026

Read on slack.com, checked Nov 13, 2026

Questions to ask in your demo

  1. Which of your customers look like us, by industry and size?
  2. What does a pilot cost, and what decides the move to a full contract?
  3. Where is our data stored, who can access it, and is it used to train models?
  4. How does Slack work with the tools we already use?
Alternatives

Slack alternatives, by public customers

Same or competing category, from another vendor. Every proof level counts. A shared category alone does not establish the same functions or suitability for your task.

All Slack alternatives →
Workspaces & project management ranking →

Often used with Slack

Other categories found at the same companies. All proof levels are included, including job-post signals. This does not establish an integration or joint use.

  • ClaudeAI assistants9 companies in common
  • SnowflakeData platforms & analytics9 companies in common
  • BasetenAI inference & GPU cloud8 companies in common
  • CursorAI coding assistants & agents7 companies in common
  • ResendEmail delivery & templates7 companies in common
  • Stripe PaymentsPayment processing6 companies in common
FAQ

Questions about Slack

Who uses Slack?

50 companies use Slack (19 confirmed, 11 declared, 20 observed), including IBM, OpenAI, and Capital One.

What results do companies report with Slack?

Companies that use Slack report these results in public case studies. Mural: that would take someone more than an hour (source: slack.com, checked November 12, 2026). Isometric: saves me four to five hours each week (source: slack.com, checked November 12, 2026). Gocertify: saves our people ops lead at least an hour a week (source: slack.com, checked November 12, 2026).

How much does Slack cost?

Slack lists these prices on its own website:

  • Free: $0
  • Pro: $8.75
  • Business+: $18
  • Enterprise+: $45

Source: slack.com, checked November 13, 2026.

Is Slack SOC 2 and ISO 27001 certified?

Slack states on its own website that it holds ISO 27001, ISO 27017, ISO 27018, ISO 27701, ISO 42001, and SOC 2 Type II. Source: join.slack.com, checked November 13, 2026.

Does Slack offer a data processing agreement (DPA)?

Yes: Slack states on its own website that a data processing agreement (DPA) is available to customers. Source: slack.com, checked November 13, 2026.

Does Slack integrate with Zoom, ChatGPT, and Box?

Slack lists 8 integrations on its own website, including Zoom, ChatGPT, Box, Asana, Claude, and Salesforce. Source: slack.com, checked November 13, 2026.

Does Slack have a free trial?

Slack states on its own website that a free trial or a free plan is available. Source: slack.com, checked November 13, 2026.

Which industries use Slack?

The industries with the most Slack customers are Artificial Intelligence (14), DevTools & Infrastructure (3), and Fintech & Payments (3).

What are the alternatives to Slack?

Ranked by public customers (every proof level counts, job posts included), the top Slack alternatives are Jotform (148 customers, 0 shared), Miro (126 customers, 3 shared), Notion (117 customers, 5 shared), and Asana (42 customers, 2 shared). See all Slack alternatives.

How does usedby know who uses Slack, and how current is it?

Each company here links to a public page that names it as a Slack customer, and each line shows its proof level. A company that declared Slack itself is marked Declared. The latest check ran on November 13, 2026. How usedby collects and checks its data.

Sources

Where this data comes from

Three proof levels

Confirmed · 19Case study, named quote or press release.
Declared · 11The company told usedby itself that it uses Slack, or lists it as a sub-processor on its own legal page.
Observed · 20Slack shows the company on its own pages.

Main sources

How we check →

Cite this page

UsedBy.ai (2026). Who uses Slack? 50 companies. Retrieved from https://www.usedby.ai/tools/slack, latest check November 13, 2026.