Slack reviews

3.9

77% would recommend to a friend

(1,096 total reviews)
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Stewart Butterfield

88% approve of CEO

70% positive business outlook

Slack has an employee rating of 3.9 out of 5 stars, based on 1,096 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Slack employee rating is in line with the average (within 1 standard deviation) for employers within the Informatique industry (3.9 stars).

Reviews by job title

1K reviews
5.0
Mar 11, 2026

Great place to work

Recommend
CEO approval
Business Outlook

Pros

Interesting product, good culture, strong design team

Cons

Not as good as pre acquisition

4.0
Feb 9, 2026
Recommend
CEO approval
Business Outlook

Pros

uses Slack for everything, obviously great work-life balance clear expectations in eng IC career ladder

Cons

more and more Salesforce corporate policies eroding the old Slack people-first culture I've felt disengaged with executive leadership since the departure of Cal Henderson

Viewing 376 - 378 of 1,096 Reviews

Glassdoor has 1,228 Slack reviews submitted anonymously by Slack employees. Read employee reviews and ratings on Glassdoor to decide if Slack is right for you.