List of Companies Using Slack
Prospecting companies using Slack? Here they are, biggest first, including OUTFIT7, Pentera and Quorum. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$25M - $50M
466
$250M
$500M - $1B
466
$100M - $250M
466
$171M
$100M - $250M
466
$260M
$25M - $50M
466
$112M
$250M - $500M
465
$78M
$10M - $25M
465
$250M - $500M
465
$500M - $1B
465
$500M - $1B
465
$333K
$250M - $500M
465
$250M - $500M
465
$330M
$500M - $1B
465
$10M - $25M
464
$533M
$1B - $10B
464
$641M
$500M - $1B
464
$25M
$100M - $250M
464
$1M - $10M
464
$100M - $250M
464
$1M - $10M
464
$10M - $25M
463
$10M - $25M
463
$266M
$100M - $250M
463
$2.9B
$100M - $250M
463
$100M - $250M
463
$25M - $50M
462
$1B - $10B
462
$10M - $25M
462
$8.7B
$500M - $1B
462
$250M - $500M
462
$1B - $10B
461
$1M - $10M
461
$10B+
461
$50M - $100M
461
$675M
$250M - $500M
461
$50M - $100M
461
$250M - $500M
461
$250M - $500M
461
$1B - $10B
461
$40M
$50M - $100M
460
$100M - $250M
460
$276M
$50M - $100M
460
$100K
$250M - $500M
460
$500M - $1B
460
$170M
$250M - $500M
460
$25M - $50M
460
$50M - $100M
460
$50M - $100M
460
$67M
$1B - $10B
460
$250M - $500M
460
$8.8M
<$1M
460
$100M - $250M
460
$1M - $10M
460
$500M - $1B
459
$250M - $500M
459
$10M - $25M
459
$25M - $50M
459
$1.9B
$100M - $250M
459
$35M
$100M - $250M
459
$50M - $100M
459
$220M
$50M - $100M
459
$250M - $500M
459
$10M - $25M
459
$250M - $500M
458
$1M - $10M
458
$606M
$50M - $100M
458
$100M
$1B - $10B
458
$1B - $10B
458
$109M
$500M - $1B
458
$100M - $250M
458
$25M - $50M
458
$500M - $1B
458
$84M
$50M - $100M
458
$50M - $100M
457
$1B - $10B
457
$603M
$250M - $500M
457
$115M
$250M - $500M
457
$100M - $250M
457
$25M - $50M
457
$10M - $25M
457
$10M - $25M
457
$500M - $1B
456
$100M - $250M
456
$153M
$1B - $10B
456
$100M - $250M
456
$1M - $10M
456
$1M - $10M
456
$28M
$50M - $100M
456
$250M - $500M
456
$100M - $250M
456
$218M
$250M - $500M
456
$50M - $100M
456
$500M - $1B
456
$250M - $500M
456
$500M - $1B
456
$25M - $50M
456
$152M
$250M - $500M
456
$1B - $10B
455
$19M
$250M - $500M
455
$500M - $1B
455
About companies using Slack
Why target companies using Slack?
Slack is a Collaboration & productivity technology. The office suite, chat and project tools a company standardizes on decide which integrations and add-ons fit. Companies on the list include OUTFIT7, Pentera and Quorum.
Which industries use Slack the most?
Among companies using Slack on LeadIQ, the most common industries are Software Development, IT Services and IT Consulting, Financial Services, Technology, Information and Internet, Advertising Services and Higher Education. Narrow your list to the industry you sell into from there.
Where are companies using Slack located?
Companies using Slack are most often headquartered in the United States, the United Kingdom, Canada, France, Germany and Australia.
What other Collaboration & productivity technologies do companies use?
Prospecting the wider Collaboration & productivity space? Related technologies with their own company lists include Microsoft 365, Google Workspace, Microsoft SharePoint and Microsoft Teams.
How do I reach decision makers at companies using Slack?
Open a company to see its employee directory and email format, then use LeadIQ to get verified work emails and phone numbers for the people you want to reach and push them straight to your CRM or sequencer.
Insights based on LeadIQ data refreshed in September 2026.
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Top companies by employee count
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