Slack Statistics, User Counts and Facts (2021)

Additional Slack Statistics

Number of messages sent weekly:

1 billion

Last updated 5/31/19

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Number of paid accounts:

3 million

Last updated 5/22/18

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Number of organizations that use Slack:

750,000 organizations

Last updated 6/4/20

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Number of teams that use the free version:

550,000

Last updated 5/13/19

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Number of daily active users when it launched in February 2014:

16,000 users

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Number of paid teams:

• 2021: 169,000 teams
• 2020: 122,000 teams
• 2019: 88,000 teams
• 2018: 59,000 teams
• 2017: 37,000 teams

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Average amount of time users are active on weekdays:

90 minutes

Last updated 5/31/19

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Percentage of the Fortune 100 that pay for Slack:

65%

Last updated 10/26/21

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Number of times users have used workflows on them:

4 million times

Last updated 4/8/20

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Average amount of hours users stay plugged into it on a weekday:

9 hours

Last updated 10/1/19

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Number of developers that use the API weekly:

200,000

Last updated 5/22/18

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Percentage of daily users that are from outside the US:

more than half

Last updated 5/31/19

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Number of employees:

1,664 employees

Last updated 4/30/19

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Amount of funding raised to date:

$1.268 million

Last updated 8/21/18

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Slack’s reported valuation:

$7.1 billion

Last updated 8/21/18

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Amount of time that users spend on it weekly:

50 million hours

Last updated 5/31/19

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Number of apps in the app directory:

2,000 apps

Last updated 3/16/20

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Number of Enterprise Grid customers:

150

Last updated 1/31/18

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Number of countries that Slack has users in:

150

Last updated 10/26/21

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Percentage of users that say it improves their communication and collaboration inside their organization:

87%

Last updated 5/31/19

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Slack paid customer counts (annual):

• Year ended January 31, 2020: 110,000
• Year ended January 31, 2019: 88,000
• Year ended January 31, 2018: 59,000
• Year ended January 31, 2017: 37,000

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Number of monthly messages sent:

1.5 billion
Last updated 2/24/16

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Top city (globally) for usage:

San Francisco

Last updated 2/12/15

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Number of apps that have been developed:

4,000 apps

Last updated 12/15/15

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Top country for usage:

United States

Last updated 2/12/15

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Top city (outside of U.S) for usage:

Tokyo

Last updated 2/12/16

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Retention rate for paid users:

98%

Last updated 4/16/15

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Number of people in Tokyo that use Slack:

330,000

Last updated 9/12/17

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Number of people in London that use Slack:

196,000

Last updated 9/12/17

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Number of people in Berlin that use Slack:

82,000

Last updated 9/12/17

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Number of people in New York City that use Slack:

420,000

Last updated 9/12/17

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Weekly active users growth rate:

3-5%

Last updated 1/19/15

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Total number of hours users collectively spend on it monthly:

100 million hours

Last updated 2/12/15

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Maximum number of users logged in at the same time:

1 million

Last updated 10/27/15

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Most configured integration

Google Drive

Last updated 2/12/15

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Number of integrations to date:

900,000

Last updated 6/24/15

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Percentage of users that say it improves transparency and culture in the office:

80.4%

Last updated 7/14/15

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Average reduction in office email that users see:

48.6% reduction

Last updated 7/14/15

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Average reduction in office meetings that users see:

25.1% reduction

Last updated 7/14/15

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Average increase in team productivity that users see:

32% increase

Last updated 7/14/15

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Percentage of users that say it makes finding information easier for them:

62.4%

Last updated 7/14/15

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Percentage of users that say it improves team culture:

79%

Last updated 7/14/15

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Percentage of managers that are women:

43%

Last updated 2/3/16

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Percentage of employees that are women:

42.9%
Last updated 2/3/16

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Average number of monthly app installs from the app Directory:

415,000 installs

Last updated 10/20/16

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Number of third-party app installs to date:

8.8 million

Last updated 9/12/17

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Percentage of customers that use integrations:

90%

Last updated 9/27/16

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Number of offices:

7 offices
Last updated 10/20/16

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Average number of times a Google Drive file is imported each weekday:

60,000 times

Last updated 12/7/16

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Number of bots in the App Directory:

900 bots
Last updated 2/7/17

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Percentage of paid teams that are actively using at least one app:

90%

Last updated 4/11/17

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Reported amount Amazon was willing to pay for Slack in June 2016:

$9 billion

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Number of users in Tokyo:

280,000 Daily Active Users

Last updated 7/19/18

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Number of Slack users in Japan:

500,000 Daily Active Users

Last updated 7/19/18

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Number of paid subscribers in Japan:

155,000

Last updated 7/19/18

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