DOSSIER · UPDATED 18 NOV 2025

Slack

When your team needs to kick off a project, hire a new employee, deploy some code, review a sales contract, finalize next year's budget, measure an A/B test, plan your next office opening, and more, Slack has you covered.

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Founded
2009
Headcount
2,135
Open roles
0
Last raised
IPO
SECTION I · THE BRIEF

Inside Slack

Brief #66976Updated 18 NOV 2025SAN FRANCISCOB2B SOFTWARE AND SERVICESIPO
Employbl Dossier

Slack

When your team needs to kick off a project, hire a new employee, deploy some code, review a sales contract, finalize next year's budget, measure an A/B test, plan your next office opening, and more, Slack has you…

Founded
2009
Headcount
2,135
Open roles
0
Last raised
IPO
Section II · Premium ProfileMembers only
  • 01Engineering interview process at SlackLocked
  • 02Tech stack & infrastructure choicesLocked
  • 03Culture & day-to-day work styleLocked
  • 04Why join now vs. 6 months from nowLocked
  • 05Hiring focus & open headcount by teamLocked
  • 06Comp philosophy and band contextLocked
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LEADERSHIP

Founders & key people

Stewart ButterfieldStewart Butterfield
Serguei MourachovSerguei Mourachov
OPEN ROLES

Hiring at Slack

No open roles listed right now. Check back soon or search all jobs →

FUNDING

Capital raised

Total Amount Raised: $1,391,099,904

Slack's Investors

Slack Funding Rounds

  • IPO

    Unknown

  • IPO

    Unknown

  • Series H

    $427,000,000

  • Series H

    $427,000,000

    Series H Investors

    Dragoneer Investment Group
    General Atlantic
    Baillie Gifford
    Wellington Management
    Sands Capital Management
    T. Rowe Price
    Accel
    SoftBank Vision Fund

  • Series G

    $412,700,000

  • Series G

    $412,700,000

    Series G Investors

    SoftBank Vision Fund
    Accel
    Global Founders Capital
    AAFM
    Moonshots Capital

  • Series F

    $208,000,000

  • Series F

    $208,000,000

    Series F Investors

    Thrive Capital
    Notable Capital
    Comcast Ventures
    Accel
    Index Ventures
    Social + Capital Partnership
    Institutional Venture Partners (IVP)
    Lowercase Capital
    ACME
    Ling Wong

  • Series E

    $172,700,000

  • Series E

    $172,700,000

    Series E Investors

    Social + Capital Partnership
    Horizons Ventures
    DST Global
    Index Ventures
    Spark Capital
    Institutional Venture Partners (IVP)
    Accel
    Andreessen Horowitz
    GV
    Kleiner Perkins
    Groupe Arnault
    Slow Ventures
    FundersClub

  • Series D

    $110,750,000

  • Series D

    $110,750,000

    Series D Investors

    GV
    Kleiner Perkins
    Andreessen Horowitz
    Accel
    Social + Capital Partnership
    Slow Ventures

  • Series C

    $42,750,000

  • Series C

    $42,750,000

    Series C Investors

    Social + Capital Partnership
    Accel
    Andreessen Horowitz
    Jeremy Stoppelman
    Anthony Casalena
    John Collison
    Jeff Weiner
    Rob Solomon
    Biz Stone
    FundersClub
    Bryan Rosenblatt
    David Sacks

  • Series B

    $10,700,000

  • Series B

    $10,700,000

    Series B Investors

    Accel
    Andreessen Horowitz
    Next Play Ventures
    Alfred Chuang

  • Series A

    $5,000,000

  • Series A

    $5,000,000

    Series A Investors

    Accel
    Andreessen Horowitz

  • Seed

    $1,500,000

  • Seed

    $1,500,000

    Seed Investors

    Accel
    Marc Andreessen
    Jeff Weiner
    Bradley Horowitz
    Rob Solomon
Funding info provided by Diffbot.
TAGS

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Slack's Investors

Slack's Industries

Slack's Tech Stack

LOCATIONS

Where they work

Slack Headquarters Location

500 Howard Street, San Francisco, CA, 94105-3000

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