Here are some of the more impressive Slack statistics I’ve been able to dig up recently. As always, be sure to check back in the future as I will be updating this post as new and updated stats become available.

The team messaging app Slack has only been around for about a year, but it has certainly created quite a stir among influencers in its short existence. While it only has a few million daily users currently (a relatively small user tally these days), those who use Slack rave about the product and its user engagement stats are very impressive.

Slack stands poised to grow and become a real player in the enterprise group collaboration and chat market in 2019, so I wanted to take a quick look at some of their early numbers.

Slack Facts

Slack Website: slack.com
Slack Launch Year: 2013
Slack Headquarters: San Francisco, CA
Slack Founder: Stewart Butterfield
What is Slack?

Slack brings team communication and collaboration into one place so you can get more work done, whether you belong to a large enterprise or a small business. Check off your to-do list and move your projects forward by bringing the right people, conversations, tools, and information you need together. Slack is available on any device, so you can find and access your team and your work, whether you’re at your desk or on the go. (source)

Slack Statistics

How many people use Slack?

10 million DAU

Last updated 5/30/19

Number of Slack weekly active users:

9 million

Last updated 5/5/18

Number of messages sent weekly on Slack:

1 billion

Last updated 5/31/19

Number of paid Slack accounts:

3 million

Last updated 5/22/18

Number of organizations that use Slack:

600,000

Last updated 5/13/19

Number of teams that use the free version of Slack:

550,000

Last updated 5/13/19

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

16,000 users

Number of paid teams on Slack:

2019: 88,000 teams (Last updated 5/30/19)
2018: 59,000 teams
2017: 37,000 teams

Average amount of time users are active on Slack on weekdays:

90 minutes

Last updated 5/31/19

Percentage of the Fortune 100 that pay for Slack:

43%

Last updated 5/5/18

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

10 hours

Last updated 4/1/16

Number of developers that use Slacks API weekly:

200,000

Last updated 5/22/18

Percentage of Slack daily users that are from outside the US:

more than half

Last updated 5/31/19

Number of Slack employees:

1,664 employees

Last updated 4/30/19

Amount of funding Slack has reported raised to date:

$1.268 million

Last updated 8/21/18

Slack’s reported valuation:

$7.1 billion

Last updated 8/21/18

Amount of time that Slack users spend on it weekly:

50 million hours

Last updated 5/31/19

Number of apps for Slack app directory:

over 1,500 apps

Last updated 5/31/19

Number of Slack Enterprise Grid customers:

150

Last updated 1/31/18

Number of countries that Slack has users in:

150

Last updated 5/31/18

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

87%

Last updated 5/31/19

Slack paid customer counts (annual):

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

Slack revenue (annual):

Year ended January 31, 2019: $400.6 million
Year ended January 31, 2018: $220.5 million
Year ended January 31, 2017: $105.2 million

Slack net loss (annual):

Year ended January 31, 2019: $138.9 million
Year ended January 31, 2018: $140 million
Year ended January 31, 2017: $146.9 million

Number of monthly messages sent on Slack:

1.5 billion
Last updated 2/24/16

Top city (globally) for Slack usage:

San Francisco

Last updated 2/12/15

Number of apps that have been developed for Slack:

4,000 apps

Last updated 12/15/15

Top country for Slack usage:

United States

Last updated 2/12/15

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

Tokyo

Last updated 2/12/16

Slack retention rate for paid users:

98%

Last updated 4/16/15

Number of people in Tokyo that use Slack:

330,000

Last updated 9/12/17

Number of people in London that use Slack:

196,000

Last updated 9/12/17

Number of people in Berlin that use Slack:

82,000

Last updated 9/12/17

Number of people in New York City that use Slack:

420,000

Last updated 9/12/17

Slack’s weekly active users growth rate:

3-5%

Last updated 1/19/15

Total number of hours Slack users collectively spend on it monthly:

100 million hours

Last updated 2/12/15

Maximum number of Slack users logged in at the same time:

1 million

Last updated 10/27/15

Most configured Slack integration

Google Drive

Last updated 2/12/15

Number of Slack integrations to date:

900,000

Last updated 6/24/15

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

80.4%

Last updated 7/14/15

Average reduction in office email that Slack users see:

48.6% reduction

Last updated 7/14/15

Average reduction in office meetings that Slack users see:

25.1% reduction

Last updated 7/14/15

Average increase in team productivity that Slack users see:

32% increase

Last updated 7/14/15

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

62.4%

Last updated 7/14/15

Percentage of Slack users that say it improves team culture:

79%

Last updated 7/14/15

Percentage of Slack managers that are women:

43%

Last updated 2/3/16

Percentage of Slack employees that are women:

42.9%
Last updated 2/3/16

Average number of monthly app installs from the Slack app Directory:

415,000 installs

Last updated 10/20/16

Number of third-party app installs on Slack to date:

8.8 million

Last updated 9/12/17

Percentage of Slack customers that use integrations:

90%

Last updated 9/27/16

Number of Slack offices:

7 offices
Last updated 10/20/16

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

60,000 times

Last updated 12/7/16

Number of bots in the Slack App Directory:

900 bots
Last updated 2/7/17

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

90%

Last updated 4/11/17

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

$9 billion

Number of Slack users in Tokyo:

280,000 Daily Active Users

Last updated 7/19/18

Number of Slack users in Japan:

500,000 Daily Active Users

Last updated 7/19/18

Number of Slack paid subscribers in Japan:

155,000

Last updated 7/19/18

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Users
Demographics
Revenue
Growth
Etc.- all in one place

I try to go through each and every stat regularly and update as much as possible, but we all know that some stats are easier to track down than others. As always, every stat is linked to its original source and has the source date listed.

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Craig Smith

https://expandedramblings.com/index.php/about-dmr/

DMR Publisher. Director of Marketing by day and I run this little site at night. Other interests include Disney, Sports, 80’s Nostalgia, LEGO, Star Wars and Tech Gadgets. Other sites include DisneyNews.us and VideoGamesStats.com.

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Slack Facts

Slack Statistics

How many people use Slack?

Number of Slack weekly active users:

Number of messages sent weekly on Slack:

Number of paid Slack accounts:

Number of organizations that use Slack:

Number of teams that use the free version of Slack:

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

Number of paid teams on Slack:

Average amount of time users are active on Slack on weekdays:

Percentage of the Fortune 100 that pay for Slack:

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

Number of developers that use Slacks API weekly:

Percentage of Slack daily users that are from outside the US:

Number of Slack employees:

Amount of funding Slack has reported raised to date:

Slack’s reported valuation:

Amount of time that Slack users spend on it weekly:

Number of apps for Slack app directory:

Number of Slack Enterprise Grid customers:

Number of countries that Slack has users in:

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

Slack paid customer counts (annual):

Slack revenue (annual):

Slack net loss (annual):

Number of monthly messages sent on Slack:

Top city (globally) for Slack usage:

Number of apps that have been developed for Slack:

Top country for Slack usage:

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

Slack retention rate for paid users:

Number of people in Tokyo that use Slack:

Number of people in London that use Slack:

Number of people in Berlin that use Slack:

Number of people in New York City that use Slack:

Slack’s weekly active users growth rate:

Total number of hours Slack users collectively spend on it monthly:

Maximum number of Slack users logged in at the same time:

Most configured Slack integration

Number of Slack integrations to date:

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

Average reduction in office email that Slack users see:

Average reduction in office meetings that Slack users see:

Average increase in team productivity that Slack users see:

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

Percentage of Slack users that say it improves team culture:

Percentage of Slack managers that are women:

Percentage of Slack employees that are women:

Average number of monthly app installs from the Slack app Directory:

Number of third-party app installs on Slack to date:

Percentage of Slack customers that use integrations:

Number of Slack offices:

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

Number of bots in the Slack App Directory:

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

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

Number of Slack users in Tokyo:

Number of Slack users in Japan:

Number of Slack paid subscribers in Japan:

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