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San Francisco, California, United States
Slack Technologies, Inc. is an American international software company founded in 2009 in Vancouver, British Columbia, Canada.
Last updated
In 2020, Slack's revenue reached $1.7B. Since its launch in 2009, Slack has shown consistent revenue growth.
Slack reached a $27.7B valuation in 2020, set during its Public round.
Slack has raised $35.2B in total funding across 9 rounds, with its most recent round in 2021.
| Year | Round | Amount | Valuation | % Sold | Source |
|---|---|---|---|---|---|
| 2021 | Funding round | $27.7B | - | - | |
| 2020 | Public | - | $27.7B |
| Question | Answer |
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| What's your age? | - |
| Favorite online tool? | - |
| Favorite book? | - |
| Favorite CEO? | - |
| Advice for 20 year old self | - |
Slack serves 10M customers.
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.
Slack generates $1.7B in revenue.
Slack was founded by Stewart Butterfield.
The CEO of Slack is Stewart Butterfield.
Slack raised $35.2B across 9 rounds.
Slack has 2.7K employees.
Slack is headquartered in San Francisco, California, United States.
Slack operates across multiple industries. Browse revenue, funding, and growth data for Slack in each sector below.
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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Valuation
$27.7B
2020 Revenue
$1.7B
Customers
10M
Funding
$35.2B
Avg ACV
$170
Team
2.7K
Founded
2009
| Year | Milestone | Source |
|---|---|---|
| 2020 | Slack Hit $1.7b revenue in August 2020 | |
| 2009 | Launched with $0 revenue |
| - |
| 2019 | Funding round | $4.6B | $19.5B | 23% |
| 2018 | Series H | $427M | $6.7B | 6% |
| 2017 | Series G | $412.7M | $4.9B | 9% |
| 2016 | Series F | $208M | $3.6B | 6% |
| 2015 | Series E | $1.7B | $2.6B | 65% |
| 2014 | Series D | $110.8M | $1B | 11% |
| 2014 | Series C | $42.8M | $237.5M | 18% |
| 2011 | Series B | $10.7M | $66.7M | 16% |
| Year | Milestone | Source |
|---|---|---|
| 2020 | Reached 2.7K employees (August 2020) |
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