OverviewSuggest Edit

Slack Technologies 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, CA, US
Employee Ratings4.7
Overall CultureA+

Latest Updates

Employees (est.) (Apr 2021)2,597(+27%)
Job Openings456
Revenue (FY, 2021)$902.6 M(+44%)
Share Price (Jul 2021)$45.2
Cybersecurity ratingFMore

Key People/Management at Slack

Stewart Butterfield

Stewart Butterfield

Co-Founder and CEO, Board Member
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
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Slack Office Locations

Slack has offices in San Francisco, Chicago, Denver, New York and in 11 other locations
San Francisco, CA, US (HQ)
500 Howard St
Chicago, IL, US
71 S Wacker Dr #3440
Denver, CO, US
1681 Chestnut Pl #700
New York, NY, US
436 Lafayette St
New York, NY, US
71 5th Ave 6th Floor
San Francisco, CA, US
500 Howard St, San Francisco
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Slack Financials and Metrics

Slack Revenue

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Slack's revenue was reported to be $902.61 m in FY, 2021

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Slack's current market capitalization is $26.5 b.
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Slack Operating Metrics

Slack's Enterprise Customers was reported to be 750 k in Q1, 2021. Slack's Daily Active Users was reported to be 12.5 m in Mar, 2020.
FY, 2018Feb, 2018May, 2018Jan, 2019FY, 2019Q1, 2020Q2, 2020Sep, 2019Q3, 2020FY, 2020Mar, 2020Q1, 2021

Enterprise Customers

500 k600 k600 k600 k660 k750 k

Paid Customers

59 k50 k70 k88 k95 k100 k105 k110 k110 k122 k

$100k+ Enterprise Customers


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8 m10 m10 m10 m12 m12.5 m
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Slack Acquisitions / Subsidiaries

Company NameDateDeal Size
WovenApril 30, 2021
RimetoJuly 08, 2020
Astro TechnologySeptember 24, 2018
HipChatJuly 27, 2018
StrideJuly 27, 2018
MissionsJuly 17, 2018
Screenhero, IncJanuary 28, 2015
Slack Australia Pty Limited
Slack Canada Ltd
Slack France
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Slack Revenue Breakdown

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Slack revenue breakdown by geographic segment: 37.4% from International and 62.6% from United States

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Slack Cybersecurity Score

Cybersecurity ratingPremium dataset



SecurityScorecard logo

Slack Environment, Social & Governance (ESG) Ratings

CSRHub ESG ratingPremium dataset


out of 100

CSRHub logo

Slack Online and Social Media Presence

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Slack Company Culture

  • Overall Culture



  • CEO Rating



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  • Diversity



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Slack News and Updates

The COO of Salesforce and the CEO of Slack reveal the biggest lessons they can teach each other now that their $27.7 billion combination is complete (CRM)

Summary List PlacementAs of Wednesday, Salesforce has officially closed its $27.7 billion acquisition of Slack, six months after the massive deal to acquire the workplace chat app was first announced. The cloud software giant has not been shy about the fact that this so-called "Slackforce" deal gi…

Salesforce Completes Acquisition of Slack

SAN FRANCISCO, July 21, 2021 /PRNewswire/ -- Salesforce (NYSE: CRM), the global leader in CRM, today announced it has completed its acquisition of Slack Technologies, Inc. "We couldn't be more excited to have Slack as part of the Salesforce family, combining the #1 CRM and the...

Thinking about buying stock in BP, Halliburton, Virgin Galactic, Delta Air Lines, or Slack Technologies?

NEW YORK, July 20, 2021 /PRNewswire/ -- InvestorsObserver issues critical PriceWatch Alerts for BP, HAL, SPCE, DAL, and WORK. To see how InvestorsObserver's proprietary scoring system rates these stocks, view the InvestorsObserver's PriceWatch Alert by selecting the corresponding link....

Slack, Salesforce Merger Nears Closure After DoJ Drops Antitrust Review

The $27.7 billion merger between Salesforce and Slack is set to close on July 21.

Netflix Co-CEO Ted Sarandos Disputes Report of Execs Fired Over Slack Messages

Sarandos used LinkedIn to respond to the report, which had raised questions about workplace privacy at the streaming company.

Visco Warns Against Prematurely Reducing ECB Stimulus Amid Slack

Visco Warns Against Prematurely Reducing ECB Stimulus Amid Slack
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Slack Blogs

Turn your Slack data into actionable insights with the new Splunk app

It’s no secret that humans aren’t great at analyzing data on our own, particularly when it comes to massive, unstructured data sets. The good news is there’s Splunk, which is designed to help investigate, monitor, analyze and take action on data.  With Splunk’s Data-to-Everything Platform, companies…

Introducing powerful new layers of enterprise-grade security

In the wake of the Covid-19 pandemic, digital transformation is happening at warp speed. The kind of widespread technological adaptation we expected to see years from now has been truncated to a matter of months as organizations adopt cloud solutions to keep their teams connected. And as more and mo…

Slack Announces Date of Second Quarter Fiscal Year 2021 Financial Results

SAN FRANCISCO, August 10, 2020—Slack Technologies, Inc. (NYSE:WORK) today announced that it will report its financial results for the second quarter of fiscal year 2021, ended July 31, 2020, following the close of the U.S. markets on Tuesday, September 8, 2020. Slack will host a conference call that…

Update on extended work from home for Slack employees

As hopes for a quick recovery from the coronavirus pandemic have faded, it’s time to think more broadly about how we work. After all, successfully adapting to remote work depends on much more than replicating at home the same processes we once carried out in a physical office. In order to rethink ho…

Le Wagon scales one the world’s best coding bootcamps with Slack

For anyone interested in breaking into the technology industry or taking their computer programming and leadership skills to the next level, international coding bootcamp Le Wagon is here to help. Founded in Paris in 2013, Le Wagon has since expanded to 39 cities in 20 countries. And Slack, the chan…

New guide: Navigating the disruption of work

We don’t have to tell you all the ways work has changed over the past few months. If you worked in an office, you probably don’t right now. In-person meetings have been replaced by video conferencing, the nursery has become a study and your old routine is probably toast. Across the globe, organizati…
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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 Stewart Butterfield, Cal Henderson and Allen Shim.

  • How many employees does Slack have?

    Slack has 2,597 employees.

  • What is Slack revenue?

    Latest Slack annual revenue is $902.6 m.

  • What is Slack revenue per employee?

    Latest Slack revenue per employee is $347.6 k.

  • Who are Slack competitors?

    Competitors of Slack include Microsoft Teams, Flock and Telegram.

  • Where is Slack headquarters?

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

  • Where are Slack offices?

    Slack has offices in San Francisco, Chicago, Denver, New York and in 11 other locations.

  • How many offices does Slack have?

    Slack has 17 offices.