List of Companies Using Slack
Prospecting companies using Slack? Here they are, biggest first, including OHSU Casey Eye Institute, ProviderTrust and QA North America. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$25M - $50M
130
$1.8M
$50M - $100M
130
$3.1M
$100M - $250M
130
$57M
$50M - $100M
130
$15M
$250M - $500M
130
$8.3M
$1M - $10M
130
$10M - $25M
130
$79M
$50M - $100M
130
$12M
$250M - $500M
130
$50M - $100M
130
$148M
$250M - $500M
130
$58M
$50M - $100M
130
$2.2M
$1M - $10M
130
$249M
$50M - $100M
130
$7.6M
$50M - $100M
130
$8.5M
$1M - $10M
130
$1M - $10M
130
$41M
$10M - $25M
130
<$1M
130
$7.3M
$1M - $10M
129
$25K
$50M - $100M
129
$50M - $100M
129
$320M
$10M - $25M
129
$250M - $500M
129
$38M
$25M - $50M
129
$65M
$50M - $100M
129
$790M
$50M - $100M
129
$10M - $25M
129
$56M
$25M - $50M
129
$240M
$100M - $250M
129
$81M
$100M - $250M
129
$100M - $250M
129
$14M
$50M - $100M
129
$1M - $10M
129
$25M - $50M
129
$24M
$10M - $25M
129
$182M
$50M - $100M
129
$5.5M
$25M - $50M
129
$1M - $10M
129
$10M - $25M
129
$100M - $250M
129
$1M - $10M
129
$114M
$10M - $25M
129
$175M
$100M - $250M
129
$25M - $50M
129
$39M
$250M - $500M
129
$25M - $50M
129
$4.7M
$10M - $25M
129
$25M - $50M
129
$50M - $100M
129
$187M
$25M - $50M
129
$1B - $10B
129
$35M
$100M - $250M
129
$56M
$10M - $25M
129
$60M
$1M - $10M
129
$5M
$50M - $100M
129
$1M - $10M
129
$25M - $50M
129
$102M
$100M - $250M
129
$72M
$50M - $100M
129
$50M - $100M
129
$250M - $500M
129
$36M
$25M - $50M
129
$25M - $50M
129
$9.5M
$10M - $25M
129
$50M - $100M
129
$1M - $10M
129
$78M
$50M - $100M
129
$50M - $100M
129
$100M - $250M
129
$668M
$100M - $250M
129
$19M
$50M - $100M
129
$10M - $25M
129
$59M
$25M - $50M
129
$53M
$25M - $50M
129
$10M - $25M
129
$1M - $10M
129
$4.5M
<$1M
129
$16M
$50M - $100M
128
$50M - $100M
128
$10M - $25M
128
$100M - $250M
128
$43M
$25M - $50M
128
$2.5M
$10M - $25M
128
$1.4M
$25M - $50M
128
$25M - $50M
128
$60M
$100M - $250M
128
$59M
$25M - $50M
128
$25M - $50M
128
$100M - $250M
128
$60M
$100M - $250M
128
$100M - $250M
128
$25M - $50M
128
$26M
$50M - $100M
128
$100M - $250M
128
$1M - $10M
128
$100M - $250M
128
$25M
$10M - $25M
128
$50M - $100M
128
$10M - $25M
128
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 OHSU Casey Eye Institute, ProviderTrust and QA North America.
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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