Slack reviews

3.9

77% would recommend to a friend

(1,095 total reviews)
avatar

Stewart Butterfield

88% approve of CEO

70% positive business outlook

Slack has an employee rating of 3.9 out of 5 stars, based on 1,095 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 IT (Information Technology) industry (3.9 stars).

Reviews by job title

1K reviews
5.0
Aug 11, 2025

Great company!

Recommend
CEO approval
Business Outlook

Pros

Great benefits, flexible work/life schedule and opportunities to innovate. I work on a very collaborative team and have a great manager.

Cons

Priorities can change, so don't be married to any one idea or project. Slack is constantly testing things that never ship in the spirit of making sure what ends up in customer's hands is the right choice. Leveling up is hard - their criteria is quite intense compared to other companies.

Viewing 37 - 39 of 1,095 Reviews

Glassdoor has 1,227 Slack reviews submitted anonymously by Slack employees. Read employee reviews and ratings on Glassdoor to decide if Slack is right for you.