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Slack
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Slack Company Overview

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Slack

● Active
Software · San Francisco, California · Est. 2009
Team CollaborationMessagingProductivitySaaSWorkflow↗ 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
Product Launch·2026-02-17
Slack Launches Real-Time Search API and MCP Server
Slack announced the general availability of its Real-Time Search API and Model Context Protocol server, enabling third-party AI agents to securely ground themselves in Slack's conversational data without storing customer information externally. The launch saw a 25x increase in both query volume and MCP tool calls, with companies including OpenAI, Anthropic, Google, Notion, and Vercel building agents on top of the new APIs. The release establishes Slack as a foundational data layer for enterprise AI agents.
Partnership·2025-10-14
Slack Adds Multi-Agent Collaboration and Expanded AI Workflow Builder
Slack rolled out expanded AI capabilities including multi-agent collaboration in channels, allowing multiple specialized AI agents to work simultaneously on tasks such as pulling campaign data and updating budgets in parallel. The Workflow Builder was updated to integrate AI agents into automated processes, removing the need for manual handoffs. These features were part of a broader push to make Slack the operating system for AI-powered enterprise work.
Product Launch·2025-10-14
Slack Introduces Native Agentforce AI Agents at Dreamforce 2025
At Dreamforce 2025, Salesforce unveiled a deeply integrated AI experience inside Slack, bringing Agentforce Sales, IT Service, and HR Service agents directly into the platform. Employees can now interact with CRM records, file support tickets, ask HR questions, and receive AI-generated next steps without leaving Slack. The announcements positioned Slack as the primary execution layer for Salesforce's Agentic Enterprise vision.
Press Release·2025-10-14
Slackbot Becomes a Personalized AI Companion Powered by Claude
Slack announced that its redesigned Slackbot — powered by Anthropic's Claude model — would become generally available in early 2026 as a personalized AI companion grounded in enterprise data. The new Slackbot can listen to meetings on Zoom, Google Meet, and Slack Huddles, summarize decisions, create action items, and log them directly into CRM systems. Over 30 new AI features were bundled into the announcement, including a native CRM tool for small businesses.
Press Release·2025-06-15
Salesforce to Include Slack for All New Customers Starting Summer 2025
Salesforce announced that starting in the summer of 2025, Slack would be automatically included for all new Salesforce customers, significantly expanding its addressable user base. The move deepens the integration between Salesforce's CRM platform and Slack's collaboration layer as part of the Agentforce 360 strategy. It signals Salesforce's intent to make Slack the default workspace for all enterprise workflows running on the Salesforce platform.
Company History
8 milestones
Stewart Butterfield, Eric Costello, Cal Henderson, and Serguei Mourachov founded Tiny Speck in Vancouver to build Glitch, a web-based multiplayer online game — the internal communication tool they built for their team would later become Slack.

Slack Organization Structure & Team

Org Chart
2,600 employees · Click a leader to explore their team
3,120 across 12 departments
Chief Executive Officer
Denise Dresser
Allen Shim — Departments
· 3120 people across 12 depts

Slack Financials, Revenue & Market Share

Annual Revenue
$1.9B
+15% vs prior year
YoY Growth
+15%
From $902M to $1.9B
Revenue / Employee
$731K
Annual revenue per full-time employee
Revenue Growth
2021
2022
2023
2024
2025
$902M
$1.2B
$1.5B
$1.7B
$1.9B
Market Share
Enterprise Team Messaging
26%
share
Slack
26%
Microsoft Teams
42%
Google Chat
18%
Zoom Team Chat
8%
Others
6%
$60B
TAM
$22B
SAM
$1.9B
SOM
Revenue Streams
Pro & Business+ Subscriptions55%
Enterprise Grid38%
Slack Connect & Add-ons7%
Business Units
Slack Platform (Messaging + AI)75%
Core team messaging, Slack AI, Huddles, Canvas, and Workflow Builder subscriptions across SMB through enterprise customer segments.
Enterprise Grid & Compliance25%
Slack for Enterprise Grid revenue with EKM, DLP, eDiscovery, and advanced admin for regulated industries including financial services and healthcare.

Slack Internal Tools & Processes

Internal Tools
12 departments
Engineering1100 people · 3 roles
Standards & Certifications
10 standards
Compliance frameworks, security audits, and quality certifications this company maintains.
Security
SOC 2 Type II
Certified
Slack holds SOC 2 Type II certification covering security, availability, and confidentiality, providing enterprise IT and procurement teams assurance that Slack's messaging infrastructure and data storage meet independent security control requirements.
Security
ISO 27001
Certified
Slack's information security management system is ISO 27001 certified, demonstrating systematic security practices for managing the sensitive business communications and file data of 200,000+ paying organizations on the Slack platform.
Security
ISO 27017
Certified
Slack is ISO 27017 certified for cloud service security controls, covering the specific risks of cloud-hosted business messaging including multi-tenant data isolation, admin access controls, and channel-level encryption for enterprise customers.
Privacy
GDPR
Compliant
Slack complies with GDPR requirements for EU customer data, providing data processing agreements, EU data residency via Slack on AWS Europe, and data subject rights tooling for the personal communications data of EU-based workspace members.
Privacy
HIPAA
Compliant
Slack supports HIPAA-compliant deployments through a Business Associate Agreement for healthcare organizations, enabling hospitals and healthcare teams to use Slack for clinical care coordination while protecting protected health information in messages and files.
Regulatory
FedRAMP Moderate
In Progress
Slack is pursuing FedRAMP Moderate authorization to enable US federal government agencies to use Slack for mission-critical team communication, complementing Salesforce's existing FedRAMP government cloud offering.
Regulatory
FINRA
Compliant
Slack's Enterprise Grid with EKM and DLP integrations supports FINRA compliance requirements for financial services firms, enabling broker-dealers to use Slack for business communications with the required message retention, archiving, and supervision capabilities.
Privacy
CCPA
Compliant
Slack complies with the California Consumer Privacy Act, providing California users and enterprise administrators with data access, deletion, and opt-out rights for the personal data collected through Slack workspace usage and communication metadata.
Security
SOC 3
Certified
Slack publishes a SOC 3 report as a publicly available general-use security certification, allowing prospective enterprise customers to review Slack's security controls without requiring a confidential NDA-protected SOC 2 report exchange.
Accessibility
WCAG 2.1 AA
Compliant
Slack's desktop and mobile applications conform to WCAG 2.1 AA accessibility standards, supporting screen readers, keyboard navigation, and high-contrast modes to ensure employees with disabilities can fully participate in Slack-based team communication.

Slack Interview Preparation

Interview Prep
Role-specific interview questions and keywords. Select a department, then click any role to prepare.
Engineering· 3 roles

Slack Products & Competitors

Product Suite
8 products · select one to explore
Software
Collaboration
Slack
Messaging and collaboration platform for teams and organisations

Slack is a channel-based team messaging platform that organizes conversations by topic, project, or team, replacing email for internal communication at over 200,000 paying organizations. It integrates with 2,400+ apps, supports threaded discussions, file sharing, and video clips, and serves as the communication layer of Salesforce's Customer 360 platform.

Use Cases
Organizing a product launch coordination across engineering, marketing, and legal teams in dedicated Slack channelsReceiving Salesforce opportunity stage change notifications in a #sales-wins Slack channel with one-click CRM updateRunning an asynchronous sprint retrospective using Slack threads and emoji reactions instead of a synchronous meeting
No image
Key Customers
ABNB
Airbnb
TGT
Target
JPL
Nasa JPL
Competitive Intelligence
VSMicrosoft Teams
THEM

Microsoft Teams is a cloud-based collaboration and communication platform from Microsoft offering chat messaging, video conferencing, file sharing, and deep Microsoft 365 application integration for enterprise teams worldwide.

EDGE

Deeper third-party app ecosystem with 2,400+ integrations and a more flexible channel architecture

VSGoogle Chat
THEM

Google Chat is a messaging and collaboration application from Google Workspace offering direct messaging, group conversations, and Spaces for team collaboration, integrated with Google Meet, Gmail, and Workspace apps for enterprise teams.

EDGE

Slack Connect enables secure collaboration with external partners without requiring them to join your domain

VSZoom Team Chat
THEM

Zoom Team Chat is Zoom's team messaging and collaboration hub providing direct messages, channels, file sharing, and app integrations alongside the Zoom video meeting platform for enterprise teams.

EDGE

Purpose-built communication layer of Salesforce Customer 360 with native CRM record surfacing in channels

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