List of Companies Using Slack
Prospecting companies using Slack? Here they are, biggest first, including Phantom, Seint and Spring EQ. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$268M
$250M - $500M
401
$100M - $250M
401
$500M - $1B
401
$250M - $500M
401
$100M - $250M
401
$133M
$50M - $100M
401
$50M - $100M
400
$50M - $100M
400
$50M - $100M
400
$100M - $250M
400
$100M - $250M
400
$100M - $250M
400
$50M - $100M
400
$272M
$1B - $10B
400
$100M - $250M
400
$58M
$100M - $250M
400
$250M - $500M
400
$100M - $250M
400
$372M
$100M - $250M
400
$1M - $10M
400
$122M
$100M - $250M
400
$250M - $500M
400
$51M
$25M - $50M
399
$10M - $25M
399
$100M - $250M
399
$208M
$250M - $500M
399
$500M - $1B
399
$500M - $1B
399
$11M
$1B - $10B
399
$100M - $250M
399
$100M - $250M
399
$100M - $250M
399
$18M
$250M - $500M
399
$120K
$50M - $100M
399
$25M - $50M
399
$75M
$100M - $250M
399
$1M - $10M
399
$50M - $100M
399
$1M - $10M
399
$2M
$100M - $250M
398
$1M
$50M - $100M
398
$500M - $1B
398
$10M - $25M
398
$25M - $50M
398
$10M - $25M
398
$100M - $250M
398
$94M
$50M - $100M
398
$1B - $10B
398
$25M - $50M
398
$10M - $25M
398
$108M
$500M - $1B
398
$50M - $100M
397
$55M
$100M - $250M
397
$208M
$100M - $250M
397
$25M - $50M
397
$107M
$25M - $50M
397
$1M - $10M
397
$10M - $25M
397
$250M - $500M
397
$10M
$100M - $250M
397
$302M
$250M - $500M
396
$25M - $50M
396
$337M
$500M - $1B
396
$1M - $10M
396
<$1M
396
$2.6B
$500M - $1B
396
$19M
$1M - $10M
396
$100M - $250M
396
$12M
$10M - $25M
396
$10M - $25M
396
$20M
$50M - $100M
395
<$1M
395
$50M - $100M
395
$25M - $50M
395
$65M
$50M - $100M
395
$100M - $250M
395
$25M - $50M
395
$257M
$100M - $250M
395
$1B - $10B
394
$87M
$50M - $100M
394
$1M - $10M
394
$74M
$25M - $50M
394
$10M - $25M
394
$18M
$100M - $250M
394
$1M - $10M
394
$140M
$25M - $50M
394
$500M - $1B
394
$250M - $500M
394
$1M - $10M
394
$250M - $500M
394
$620M
$250M - $500M
394
$303M
$100M - $250M
393
$100M - $250M
393
$100M - $250M
393
$1M - $10M
393
$15M
$1M - $10M
393
$183M
$50M - $100M
393
$50M - $100M
393
$5M
$25M - $50M
393
$450M
$500M - $1B
393
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 Phantom, Seint and Spring EQ.
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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