OverviewSuggest Edit

Slack is a company developing collaboration software. It offers a team communication application that provides messaging, video and voice calls, organized conversations, integrated file sharing, searchable history, and other capabilities, as well as numerous integrated third-party tools. The company serves engineering, financial services, sales, IT, marketing, customer support, HR, project management, and media industries.
HQSan Francisco, US
Employee Ratings4.5
Culture scoreA-

Latest Updates

Employees (est.) (Oct 2019)1,982(+7%)
Job Openings194
Revenue (FY, 2020)$630.4 M(+58%)
Share Price (May 2020)$31.7

Key People/Management at Slack

Cal Henderson

Cal Henderson

Co-Founder and Chief Technology Officer
Allen Shim

Allen Shim

Chief Financial Officer
Tamar Yehoshua

Tamar Yehoshua

Chief Product Officer
David Schellhase

David Schellhase

General Counsel
Julie Liegl

Julie Liegl

Chief Marketing Officer
Robert Frati

Robert Frati

Senior Vice President of Sales & Customer Success
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Slack Office Locations

Slack has offices in San Francisco, Chicago, Denver, New York and in 10 other locations
San Francisco, US (HQ)
500 Howard St, San Francisco
Chicago, US
71 S Wacker Dr #3440
Denver, US
1681 Chestnut Pl #700
New York, US
436 Lafayette St
New York, US
71 5th Ave 6th Floor
San Francisco, US
22 4th St 16th Floor, San Francisco
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Slack Financials and Metrics

Slack Revenue

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Slack's revenue was reported to be $630.42 m in FY, 2020

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Slack's current market capitalization is $17.8 b.
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Slack Operating Metrics

Slack's Daily Active Users was reported to be 44 m in Mar, 2020. Slack's Users was reported to be 4 m in Y, 2016. Slack's Enterprise Customers was reported to be 600 k in Q1, 2020.
Jul, 2014Oct, 2015Y, 2016Mar, 2017Jun, 2017Sep, 2017May, 2018Jan, 2019FY, 2019Q1, 2020Sep, 2019Mar, 2020


1.70 m4 m

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38 k480 k1.25 m1.50 m2 m3 m

Daily Active Users

120 k4 m5 m5 m6 m8 m10 m10 m10 m12 m44 m

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90 k500 k600 k600 k600 k
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Slack Acquisitions / Subsidiaries

Company NameDateDeal Size
Astro TechnologySeptember 24, 2018
HipChatJuly 27, 2018
StrideJuly 27, 2018
MissionsJuly 17, 2018
Screenhero, IncJanuary 28, 2015
SpacesSeptember 26, 2014
Slack Australia Pty Limited
Slack Canada Ltd
Slack France
Slack Fund L.L.C.
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Slack Revenue Breakdown

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Slack revenue breakdown by geographic segment: 63.7% from United States and 36.3% from International

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Slack Online and Social Media Presence

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Slack Company Culture

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Slack News and Updates

Buddy systems and 24-hour coffee breaks: How companies like Slack, Zoom, and Box are hiring and training new employees during the pandemic

As the pandemic has forced companies to shift to remote work, most have had to completely change the way they hire and onboard new employees. Enterprise technology companies like Box, Slack, and Okta are taking unique approaches to hiring and training new employees.  For example, they're grouping …

7 Slack secrets that will change how you communicate with coworkers

Save time and enhance your messaging environment with these little-known, super-useful options. If there’s one thing we humans can agree upon these days, it’s that communicating sure isn’t easy.Read Full Story

GitLab’s head of Remote on hiring, onboarding and why Slack is a no-work zone

With more than 1,200 employees distributed across over 65 countries and a valuation of nearly $3 billion, GitLab is one of the world’s most successful fully remote startups. Describing it as a textbook example of a remote company would be redundant, because the company actually wrote a textbook abou…

(Update: it’s back) Slack is currently fixing performance issues that prevented some users from connecting

Update: Slack says connection issues are now fixed for everyone. Everyone should be able to connect to Slack now. Please let us know at feedback@slack.com if you have any connection trouble. Thank you for being patient with us, we appreciate it. https://t.co/AALbQGsDHq — Slack Status (@SlackStatus) …

The Margin: Breathe easy, remote workers: Slack is back online after brief outage

Remote workers were thrown off-balance Tuesday night when Slack Technologies Inc.’s collaboration and messaging system crashed.

Atlassian acquires help desk startup Halp to go after Slack users

Atlassian Corp. PLC has acquired Halp Inc., a venture-backed startup with a cloud service that allows enterprise help desk teams to answer employee support requests inside Slack. The terms of the deal were not disclosed. In a blog post announcing the deal today, the Halp team said the startup’s nam…
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Slack Blogs

Slack Announces Date of First Quarter Fiscal Year 2021 Financial Results

SAN FRANCISCO, May 11, 2020—Slack Technologies, Inc. (NYSE:WORK) today announced that it will report its financial results for the first quarter of fiscal year 2021, ended April 30, 2020, following the close of the U.S. markets on Thursday, June 4, 2020. Slack will host a conference call that day at…

The manager’s manual: Supporting flexible schedules

This story is part of an ongoing series to help managers navigate remote work during the Covid-19 crisis. Life is unpredictable right now, and so are our schedules. Working a strict 9 to 5 is unrealistic when you’re delivering groceries to elderly parents, learning how to homeschool on the fly, avoi…

Slack on Slack: Lessons learned while taking new-hire onboarding virtual

Slack has 16 global offices, and no matter which of them new employees called home, they’d spend their first week in San Francisco, along with their fellow new hires. These full-day, interactive onboarding sessions included how we use Slack at Slack, company culture, the usual security and legal pol…

Join us for Frontiers 2020: a free virtual conference

Frontiers, Slack’s annual conference for customers, is always a big highlight of our year. And we’ve really been looking forward to bringing our community together again in San Francisco like we did in 2019. However, to prioritize the health and safety of our customers, partners, employees and the g…

Finder amplifies global collaboration by going all-remote with Slack

This story is part of an ongoing series exploring how organizations are supporting remote work during the Covid-19 crisis. We hope these stories provide actionable tips and inspiration that organizations can use to make this transition a little bit smoother. As a free comparison site, Finder helps 1…

Masks for Docs is building a movement in Slack to fight Covid-19

This story is part of an ongoing series exploring how organizations are supporting remote work during the Covid-19 crisis. We hope these stories provide actionable tips and inspiration that organizations can use to make this transition a little bit smoother. In times of crisis, people often say “loo…
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Slack Frequently Asked Questions

  • When was Slack founded?

    Slack was founded in 2009.

  • Who are Slack key executives?

    Slack's key executives are Cal Henderson, Allen Shim and Tamar Yehoshua.

  • How many employees does Slack have?

    Slack has 1,982 employees.

  • What is Slack revenue?

    Latest Slack annual revenue is $630.4 m.

  • What is Slack revenue per employee?

    Latest Slack revenue per employee is $318.1 k.

  • Who are Slack competitors?

    Competitors of Slack include Flock, Microsoft and Telegram.

  • Where is Slack headquarters?

    Slack headquarters is located at 500 Howard St, San Francisco, San Francisco.

  • Where are Slack offices?

    Slack has offices in San Francisco, Chicago, Denver, New York and in 10 other locations.

  • How many offices does Slack have?

    Slack has 17 offices.