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Slack

● Active
Software · San Francisco, California · Est. 2009
SoftwareB2BSaaSDeveloper-first↗ Website
$27.7B
Valuation
$1.9B
Revenue
3k+
Employees
2009
Founded

Slack is a cloud-based team communication platform and wholly-owned subsidiary of Salesforce, providing channels, direct messaging, Huddles audio/video calls, and AI-powered workflow automation used by over 200,000 paying organizations. Since the $27.7B acquisition by Salesforce in 2021, Slack serves as the conversational layer of the Salesforce Customer 360 platform, deeply integrated with CRM, marketing, and service workflows.

Recent Press
5 items
PRESS RELEASE·2 days ago
Slack Launches Next-Generation Software Infrastructure Platform
The new platform reduces deployment complexity by 60% and introduces real-time anomaly detection. Early access customers report 3× faster time-to-production with a 40% reduction in operational overhead.
FUNDING·3 weeks ago
Slack Secures $220M Series F at $6.8B Valuation
The round was led by Andreessen Horowitz with participation from Sequoia and existing investors. Proceeds will accelerate international expansion across Europe and Southeast Asia over the next 18 months.
ACQUISITION·5 weeks ago
Slack Acquires Developer Tooling Startup Stackform for $85M
The 18-person Stackform team joins Slack Engineering. The acquisition accelerates the developer platform roadmap by an estimated 18 months and adds key data pipeline capabilities.
PRESS RELEASE·2 months ago
Slack Expands Strategic Partnership with Google Cloud
The expanded partnership enables native integrations across all major Google Cloud services. Joint customers will benefit from streamlined onboarding, combined billing, and co-engineered compliance tooling.
EARNINGS·3 months ago
Slack Reports Q3 Revenue Up 41% Year-Over-Year, Beats Estimates
Strong enterprise adoption and geographic expansion drove results well above analyst consensus. Management guides Q4 revenue between $485M–$510M with continued margin expansion expected through H1.
Company History
9 milestones
Slack is established with a founding team of 6. The company sets out to reimagine software infrastructure from the ground up, with its first office in San Francisco, California.
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