Slack reviews

4.0

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 4.0 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 Informatique industry (3.9 stars).

Reviews by job title

1K reviews
3.0
Jun 9, 2020
Recommend
CEO approval
Business Outlook

Pros

Beautiful HQ office (global pandemic notwithstanding), well-loved useful product, work/life balance is usually supported, strong culture of acceptance and inclusion (by a majority of ICs, at least), perks on par with comparable companies, codebase is receiving much-needed rewrites, CEO has a decent moral compass

Cons

The problem with a startup based on transparency that operates within its own “searchable log of all communication and knowledge” is that eventually, if successful, it grows up to be an enterprise company that has to admit that not everything should be found if searched for. This growth without corporate maturation has resulted in a massive communication and expectation rift, both between ICs and management as well as cross-functionally, and it fuels everything from the constructive feedback problem (everyone's afraid to give it for fear of seeming “not nice") to the product direction problem (roadmaps are slapped together and then changed if the OKRs they support start looking bad) to the reliability problem (tests are flaky and QA is understaffed) to the management problem (lots of middle managers are ineffective but aren’t supported or held accountable - until last year upwards 360 feedback cycles for management had been removed completely for over a year) to the leveling problem (many employees are brought in under-leveled, leading to a burst of work to be promoted and creating resentment and demoralization) to the hiring problem (C-suite, almost all recently and externally sourced to soothe stockholders, won’t concede outright that they want shiny FAANG resumes and not culture fit i.e. “Slackiness” anymore).

5.0
Nov 22, 2017
Recommend
CEO approval
Business Outlook

Pros

Comprehensive, well planned onboarding process with a mentorship program, regular feedback and peer support. Unbelievable perks and a strong emphasis on "work hard, then go home" (you'll hear it a lot). Weekly boosts in morale and engagement with catered lunches, hot chocolate bars, happy hours and board game hours. Really great place to work.

Cons

Very steep learning curve, though it's well terraced and constructive. Most new hires comment on "imposter syndrome", though it's pretty standard and dissolves quickly.

5.0
Oct 4, 2016

An awesome culture! Smart engineers!

Anonymous employee
Recommend
CEO approval
Business Outlook

Pros

Great benefits (commute, health, etc.). Great culture and values. Helpful coworkers, embodying the company's values to help each other strive and produce the best quality work for customers. The company is the first advocate for employees' well-being (work-life balance). Oh ... and most importantly, a very diverse place (constantly aiming for better).

Cons

If you, unlike me, like a "nerdy" environment with less communication and exchange with coworkers, THIS IS NOT A PLACE FOR YOU.

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Slack Response
8y
Thank you so much for sharing your experience working at Slack! We’re thrilled to hear that you’re enjoying your time here. We do our best to implement our core values, maintain a work life balance, and produce solid work that we are truly proud of. We appreciate your feedback and will continue to strive to maintain diversity and a solid culture as we scale.
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.