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The company behind Slack

Slack

Slack is made by Slack Technologies, LLC, which has been part of Salesforce since 2021. It earns money from paid plans sold alongside a free one; its About page counts more than 200,000 paid customers.

Read on Oct 6, 2026 from the company’s own pages and from news reports.

Slack at a glance

Founded
2014
Based in
San Francisco, California
Ownership
Part of a larger company

Who runs Slack

  • Stewart Butterfield

    Co-founder of Tiny Speck, the start-up where Slack began

    slack.com
  • Cal Henderson

    Co-founder of Tiny Speck, the start-up where Slack began

    slack.com
  • Eric Costello

    Co-founder of Tiny Speck, the start-up where Slack began

    slack.com
  • Serguei Mourachov

    Co-founder of Tiny Speck, the start-up where Slack began

    slack.com

The people Slack names itself, or a news report about it names, with the job given there.

Company details

Ownership
Part of a larger company. Owned by Salesforce (NYSE: CRM), which announced on July 21, 2021 that it had completed its acquisition of Slack. Slack's site signs itself "Slack Technologies, LLC, a Salesforce company". salesforce.com
Founded
2014 slack.com
Based in
San Francisco, California slack.com
Hiring
17 open positions, in software engineering, data, sales and user experience slack.com
Partner program
Partner programme for software partners, whose tools connect to Slack, and for consulting partners, who sign up through the Salesforce Partner Community. No commission or revenue-share terms are published. slack.com

Slack on social media and the web

Only accounts Slack links to from its own site, so you know they are its own.

Slack news and launches

Questions about Slack the company

Who runs Slack?

Slack's pages name Stewart Butterfield (Co-founder of Tiny Speck, the start-up where Slack began), Cal Henderson (Co-founder of Tiny Speck, the start-up where Slack began), Eric Costello (Co-founder of Tiny Speck, the start-up where Slack began) and Serguei Mourachov (Co-founder of Tiny Speck, the start-up where Slack began). None of them is named as chief executive on the pages read, as read on Oct 6, 2026.

Who founded Slack?

Stewart Butterfield, Cal Henderson, Eric Costello and Serguei Mourachov are named as founders of Slack, which was founded in 2014.

Is Slack funded by investors?

Owned by Salesforce (NYSE: CRM), which announced on July 21, 2021 that it had completed its acquisition of Slack. Slack's site signs itself "Slack Technologies, LLC, a Salesforce company". Its money comes from the company that owns it, not from rounds of its own.

Who owns Slack?

Owned by Salesforce (NYSE: CRM), which announced on July 21, 2021 that it had completed its acquisition of Slack. Slack's site signs itself "Slack Technologies, LLC, a Salesforce company".

Where is Slack based?

Slack gives its base as San Francisco, California.

Is Slack hiring?

17 open positions, in software engineering, data, sales and user experience.

Is Slack on social media?

Slack links to its own accounts on YouTube. The links are on this page, taken from Slack's own site.

Where this comes from

Read on Oct 6, 2026. Facts come from Slack’s own pages, news reports and investors’ own announcements; nothing from paid data sites. What no page states is left out. If something here is out of date, the company can send a correction through the vendor page.

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