About Slack
Slack is a Technology company based in San Francisco (United States) founded in 2009 by Eric Costello, Colin Magne, Cal Henderson, Stewart Butterfield, and Serguei Mourachov, and was acquired by Salesforce in December 2020. It operates as a cloud-based team communication and collaboration platform is provided. Slack has raised $1.22 billion across 11 funding rounds from investors including Atlassian, Salesforce and Kleiner Perkins. The company has 2,555 employees. Slack has completed 8 acquisitions, including Astro AI, HipChat and Missions. Slack was last valued at $27.7 billion in October 2020. Its chief executive is Stewart Butterfield. Its website slack.com draws about 127 million monthly visits. Its focus areas include Enterprise Applications, Enterprise Collaboration, Communication and Team Messaging. Its legal entity in India is Slack Technologies India Llp (AAO-4005). Its competitors include Blink, JANDI, ChatWork, ArmorText and Flock and 3 more; 8 of its 8 listed competitors have raised funding.
Company details
Provider of cloud-based team communication and collaboration platform. The platform organizes conversations into searchable channels and direct messages, supports voice and video calls, file sharing, and threaded discussions. It integrates with a broad range of third-party applications and automates workflows through bots and scripting tools. The system enables users to create workspaces for topic- or project-specific communication and provides enterprise-grade security, access controls, and administrative tools. It also incorporates AI-powered search, message summarization, and automation agents to enhance productivity and streamline team coordination.
- Headquarters San Francisco, United States
- Employees 2,555
- Founders Eric Costello, Colin Magne, Cal Henderson, Stewart Butterfield, Serguei Mourachov
- Stage Acquired
- SectorsTechnology
- Website category Computers Electronics and Technology · Social Networks and Online Communities
- Email••••••••
- Website slack.com
- Social LinkedIn X Facebook
- Acquired by Salesforce (Dec 2020)
- Legal Name Slack Technologies India Llp
- Date of Incorporation 28 Feb, 2019
- Jurisdiction Pune, Maharashtra, India
- Total Equity Funding$1.22B (USD)
in 11 rounds
- Latest Funding Round$863M (USD), Post-IPO
Apr 2020
- InvestorsAtlassian
& 53 more
- Employee Count2,555
- Investments & AcquisitionsAstro AI
& 7 more
- Acquired bySalesforce
(Dec 2020)
Associated legal entities of Slack
Slack operates through Slack Technologies India Llp (under liquidation). Its filings, financials, charges and directors are on the company page.
| Legal entity | Status | Incorporated | Registered in | Revenue | Employees | Directors | Company page |
|---|---|---|---|---|---|---|---|
| Slack Technologies India Llp CIN AAO-4005 | Under Liquidation | 28 Feb 2019 | Pune, Maharashtra | – | 74 | 2 | View details |
Apps and channels of Slack
Slack publishes 2 mobile apps with over 10M+ downloads.
Funding Insights of Slack
Slack has successfully raised a total of $1.22B across 11 strategic funding rounds. The most recent funding activity was a Post-IPO round of $863 million completed in April 2020. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $1.22B
- Total Rounds 11
- Last Round Post-IPO — $863M
- First Round $1.5M
(Jun 2009)
- Investors Count 54
Latest 10 of 11 funding rounds of Slack with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Apr 2020 | $863M | Post-IPO | – | – | – |
| Aug 2018 | $427M | Series H | $7.1B | General Atlantic, Dragoneer Investment Group | |
| Jul 2018 | – | Series G | – | – | |
| Sep 2017 | $250M | Series G | $5B | SoftBank Vision Fund | |
| Apr 2016 | $200M | Series F | $••••• | Thrive Capital, GGV Capital | |
| Apr 2015 | $160M | Series E | $••••• | DST Global Partners, Spark Capital | – |
| Oct 2014 | $120M | Series D | $••••• | Kleiner Perkins | |
| Apr 2014 | $42.75M | Series C | $••••• | Social Capital | |
| Apr 2011 | $10.7M | Series B | – | – | |
| Apr 2010 | $5M | Series A | – | – |
| Date | Valuation | Stage |
|---|---|---|
| Aug 2018 | $7.1B | •••••••• |
| Sep 2017 | $5B | •••••••• |
| Apr 2016 | $••••• | •••••••• |
| Apr 2015 | $••••• | •••••••• |
| Oct 2014 | $••••• | •••••••• |
| Apr 2014 | $••••• | •••••••• |
Full valuation and stage history of Slack
Every valuation point, the growth-stage changes (minicorn, soonicorn, unicorn) and the dates behind them require an active premium plan.
- All valuation points
- Stage changes
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Last known valuation $27.7B (Oct 2020). 54 investors in total: 54 institutional.
Investors in Slack
Slack has secured backing from 54 investors, including venture fund and institutional investors. Prominent investors backing the company include Atlassian, Salesforce and Kleiner Perkins.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Private equity fund focused on global markets | 1980 | generalatlantic.com | New York, United States | |
Private equity investments are made in technology-enabled growth companies. | – | dragoneer.com | San Francisco, United States | |
Growth stage tech & life sciences focused VC Firm investing in Asia and the US | – | sandscapitalventures.com | Arlington, United States | |
Accel is recognized as a leading venture capital firm. | 1983 | accel.com | Palo Alto, United States | |
Venture capital investments in technology startups and entrepreneurs. | – | indexventures.com | - | |
Venture capital firm focused on early-stage startups | – | globalfounderscapital.com | Berlin, Germany | |
Global investments in internet and technology startups are facilitated. | 2006 | rocket-internet.com | Berlin, Germany | |
Venture capital investments in technology and startups. | 2016 | visionfund.com | London, United Kingdom | |
Early-stage technology startups are invested in by Thrive Capital. | – | thrivecap.com | New York, United States | |
Venture capital is invested in cybersecurity, fintech, and AI startups. | – | ggvc.com | Menlo Park, United States |
Investor details for Slack
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
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Board of directors of Slack Technologies India Llp (Slack)
Slack Technologies India Llp is the primary company behind Slack. The board of Slack Technologies India Llp currently have 2 directors; the longest-serving is Sarita Sachdev, appointed in 2021. 3 earlier directors have ceased.
| Director | Designation | Appointed | Tenure | Entity |
|---|---|---|---|---|
| Sarita Sachdev DIN 08965680 | Designated Partner | 29 Jul 2021 | 5 yrs 2 mo | Slack Technologies India Llp |
| Kavita Soni DIN 08226426 | Designated Partner | 29 Jul 2021 | 5 yrs 2 mo | Slack Technologies India Llp |
People of Slack
171 people are tracked at Slack (62 in leadership, 4 in board & advisors, 105 in team); the tracked headcount is 2,555.
| Name | Role | Group |
|---|---|---|
Eric Costello | Co-Founder | Leadership |
Colin Magne | Co-Founder | Leadership |
Cal Henderson | Co-Founder & CTO | Leadership |
Stewart Butterfield | Co-Founder & CEO | Leadership |
Serguei Mourachov | Co-Founder | Leadership |
Jaime Widder | Regional Vice President, Mid-market Sales | Leadership |
Hayley Thompson | Regional Vice President - Enterprise Sales | Leadership |
Bill Dwoinen | Regional VP, Enterprise Sales | Leadership |
Peter Doolan | Chief Customer Officer | Leadership |
Mary Warnock | Vice President Human Resources | Leadership |
Kerri Dziomba | Director, Marketing Campaign Operations And Data Management | Leadership |
Vidhya Bhat | Senior Director Of Product Management | Leadership |
Donnacha Murphy | Regional Vice President - Enterprise Sales | Leadership |
Christine White | Director, Growth Marketing & Website CRO | Leadership |
Gillian Fitzgerald | Senior Director Customer Experience | Leadership |
Amelia Quinn | Regional Vice President | Leadership |
Laura Rogan | Chief Of Staff To The Slack CEO | Leadership |
Krista Bauer | Area Vice President, AMER Growth Business | Leadership |
Elaine Wu | Director Of Product Marketing | Leadership |
Jolie Stern | Regional Vice President, Financial Services | Leadership |
151 more people are available in the full profile.
Complete people profiles for Slack
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
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Investments & Acquisitions by Slack
Slack has strategically engaged in corporate development activities, having acquired 8 companies. Notable acquisitions include Astro AI, HipChat and Missions.
| Company Name | Description | Domain | Location | Founded | Acquired | Amount |
|---|---|---|---|---|---|---|
Meeting schedules are managed via an online calendar platform. | woven.com | Mountain View, United States | 2016 | May 2021 | •••• | |
Employee engagement is enhanced via a directory-based communication platform. | rimeto.com | San Francisco, United States | 2016 | Jul 2020 | •••• | |
AI is applied to manage enterprise email inboxes and workflows. | astro.ai | Palo Alto, United States | 2015 | Sep 2018 | •••• | |
Enterprise chat and video solutions are provided for teams. | hipchat.com | San Francisco, United States | 2009 | Jul 2018 | •••• | |
Secure messaging and unified communication tools are provided for teams. | stride.com | San Francisco, United States | 2002 | Jul 2018 | •••• | |
Cloud-based business process management platform for workflow automation | missions.ai | Denver, United States | 2015 | Jul 2018 | •••• | |
Cloud based platform offering secure communication solutions | screenhero.com | Mountain View, United States | 2013 | Jan 2015 | •••• | |
Remote document editing and collaboration software is provided for teams. | spaces.pm | San Francisco, United States | 2013 | Sep 2014 | •••• |
Complete acquisition details for Slack
Acquired stakes, deal sources and the complete acquisition history require an active premium plan.
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- Exports
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Timeline of Slack
15 dated milestones of Slack across 12 years, from founding to its latest funding, stage changes and deals.
- Founded Slack is founded.
- Funding First funding round of $1.5M.
- Milestone Reaches Minicorn status.
- Acquisition Acquires Slack.
- Milestone Reaches Unicorn status.
- Acquisition Acquires Screenhero.
- Acquisition Acquires Missions.
- Acquisition Acquires Stride.
- Acquisition Acquires HipChat.
- Acquisition Acquires Astro AI.
- IPO Lists on the stock exchange (IPO).
- Funding Latest funding round, Post-IPO, of $863.0M.
- Acquisition Acquires Rimeto.
- Exit Acquired by Salesforce.
- Acquisition Acquires Woven.
Competitors of Slack
Slack has 8 listed competitors in our database, 8 of them funded. They include Blink, JANDI, ChatWork, ArmorText and Flock, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| joinblink.com | 2014 | London, United Kingdom | $31.4M | 41 | Front-line workers are empowered and protected through a cloud-based platform. | |
| jandi.com | 2014 | Seoul, South Korea | $25.85M | – | Enterprise team collaboration is facilitated via cloud-based messaging platform. | |
| chatwork.com | 2012 | Sunnyvale, United States | $15.3M | 251 | Cloud based task management platform for file sharing | |
| armortext.com | 2011 | Reston, United States | $5.09M | – | Secure enterprise messaging with end-to-end encryption is offered across platforms. | |
| flock.com | 2014 | Mumbai, India | $20M | – | Cloud-based collaboration and messaging platform for professionals is provided. | |
| twist.com | 2011 | San Francisco, United States | $6M | – | Twist is developed as an async messaging app for teams. | |
| guild.co | 2016 | London, United Kingdom | $5.56M | 5 | Cloud-based communication and networking solutions for professionals are offered. | |
| speakap.com | 2011 | Amsterdam, Netherlands | $10.89M | – | Secure enterprise messaging platform for employee communication is offered. |
Detailed competitors of Slack
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
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Web traffic of Slack
The website of Slack (slack.com) receives about 127M visits a month and ranks #273 among all websites worldwide, #72 in Social Networks and Online Communities.
- Monthly visits127M
▲ 6.9% vs previous month
- Unique visitors10.8M
per month
- Global rank#273
among all websites
- Category rank#72
Computers Electronics and Technology · Social Networks and Online Communities
- Bounce rate28%
- Pages per visit9.1
- Average visit16 min 29 sec
- DevicesDesktop 96% · Mobile 4%
Websites whose visitors overlap most with Slack. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| linkedin.com | 100% | 1.9B | #18 | View details | |
| instagram.com | 92% | 7.1B | #4 | View details | |
| x.com | 90% | 4.5B | #5 | View details | |
| t.co | 88% | 676.7M | – | View details | |
| discord.com | 88% | 619.2M | #46 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 40 similar websites and full traffic analytics for Slack
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Top companies in Enterprise Collaboration & Video Tools
10 companies that operate in the same segment as Slack (Enterprise Collaboration & Video Tools), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Cloud-based enterprise collaboration suites are delivered for team productivity. | 2002 | Sydney, New South Wales, Australia | USD 210 M | USD 6.57 B | 16,867 | |
Collaborative platform for design prototyping and feedback is provided. | 2012 | San Francisco, California, United States | USD 748.62 M | – | 2,877 | |
AI-based platform for secure collaboration and content management is utilized. | 2005 | Redwood City, California, United States | USD 692.63 M | USD 1.18 B | 4,447 | |
Cloud-based software for enterprise collaboration and project management is provided. | 2013 | San Francisco, California, United States | USD 417.7 M | – | 7,141 | |
Cloud-based platform for project management and team tracking is offered. | 2012 | Tel Aviv, Tel Aviv, Israel | USD 234.7 M | USD 1.23 B | 3,900 | |
Integrated documents and spreadsheets are utilized for team project management. | 2014 | San Francisco, California, United States | USD 240 M | – | 130 | |
Cloud based suite solutions for enterprise project management | 2005 | Bellevue, Washington, United States | USD 120.59 M | – | – | |
Cloud-based file sharing and file transfer application | 2009 | Amsterdam, Netherlands | USD 63.81 M | – | – | |
AI-powered CRM for marketing and sales management is provided. | 1996 | Chennai, Tamil Nadu, India | – | USD 1.6 B | 17,856 | |
Real-time communication and conversational AI solutions are provided by Agora. | 2014 | Guangzhou, Guangdong, China | USD 55 M | USD 141.43 M | 608 |
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Related news about Slack
Complete news archive for Slack
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Frequently Asked Questions about Slack
Slack was founded in 2009.
Slack is headquartered in San Francisco, United States. It is registered at San Francisco, California, United States.
Stewart Butterfield is the current CEO of Slack. They have also founded this company.
Slack is a funded company, having raised a total of $1.22B across 11 funding rounds to date. The company's 1st funding round was a Series A of $5M, raised on Jun 2009.
Slack has 2,555 employees.
Provider of cloud-based team communication and collaboration platform. The platform organizes conversations into searchable channels and direct messages, supports voice and video calls, file sharing, and threaded discussions. It integrates with a broad range of third-party applications and automates workflows through bots and scripting tools. The system enables users to create workspaces for topic- or project-specific communication and provides enterprise-grade security, access controls, and administrative tools. It also incorporates AI-powered search, message summarization, and automation agents to enhance productivity and streamline team coordination.
Slack has 54 investors. Key investors include Atlassian, Salesforce, Kleiner Perkins, Accel, and T. Rowe Price.
The valuation of Slack is $27.7B as of Oct 2020.
Slack operates through Slack Technologies India Llp.
Yes. Slack was acquired by Salesforce in December 2020.