Slack
San Francisco, California, United States
Valuation
$27.7B
2020 Revenue
$1.7B
Customers
10M
Funding
$1.4B
Avg ACV
$170
Team
2.7K
Founded
2009
Slack Revenue, Valuation & Funding (2020)
Slack generated $1.7B in revenue in 2020.
Slack Technologies, Inc. is an American international software company founded in 2009 in Vancouver, British Columbia, Canada.
Last updated
Slack Revenue
In 2020, Slack's revenue reached $1.7B.
| Year | Milestone | Source |
|---|---|---|
| 2020 | Slack Hit $1.7b revenue in August 2020 | Not recorded |
| 2009 | Launched with $0 revenue |
Slack Valuation, Funding Rounds
Slack reached a $27.7B valuation in 2020, set during its Public round.
Slack has raised $1.4B in total funding across 8 rounds, most recently a $427M Series H round in 2018.
| Year | Round | Amount | Valuation | % Sold | Source |
|---|---|---|---|---|---|
| 2020 | Public | - | $27.7B | - | Not recorded |
| 2019 | Direct Listing (NYSE) | - | $19.5B | - | Not recorded |
| 2018 | Series H | $427M | $6.7B | 6% | Not recorded |
| 2017 | Series G | $412.7M | $4.9B | 9% | Not recorded |
| 2016 | Series F | $208M | $3.6B | 6% | Not recorded |
| 2015 | Series E | $160M | $2.8B | 6% | Not recorded |
| 2014 | Series D | $110.8M | $1B | 11% | Not recorded |
| 2014 | Series C | $42.8M | $237.5M | 18% | Not recorded |
| 2011 | Series B | $10.7M | $66.7M | 16% | Not recorded |
| 2010 | Series A | $5M | $15M | 33% | Not recorded |
Founder / CEO
Customers
Slack serves 10M customers.
Slack Employees & Team Size
Slack employs approximately 2.7K people as of 2026, including 447 sales reps that carry a quota. It serves 10M customers that rely on its solutions.
| Year | Milestone | Source |
|---|---|---|
| 2020 | Reached 2.7K employees (August 2020) | Not recorded |
Frequently Asked Questions about Slack
Is Slack still an independent company?
No. Slack was acquired.
What is Slack's revenue?
As of 2020, Slack generated $1.7B in revenue.
Who founded Slack?
Slack was founded by Stewart Butterfield.
When was Slack founded?
Slack was founded in 2009.
How much funding does Slack have?
Slack raised $1.4B across 8 rounds.
How many employees does Slack have?
As of 2020, Slack had 2.7K employees.
Where is Slack headquartered?
Slack is headquartered in San Francisco, California, United States.
Compare Slack to the industry
Slack operates across multiple industries. Browse revenue, funding, and growth data for Slack in each sector below.
Read More About Slack
Data and Sources
All figures on this page are taken directly from interviews or are estimates from public sources and proprietary models. Not financial advice. Read full disclaimer.
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