Slack Overview

  • San Francisco, CA
  • 1001 to 5000 Employees
  • 2014
  • Company - Public (WORK)
  • Internet
  • Unknown / Non-Applicable

CompetitorsMicrosoft, Atlassian, Facebook
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Slack has transformed business communication. It’s the leading channel-based messaging platform, used by millions to align their teams, unify their systems, and drive their businesses forward. Only Slack offers a secure, enterprise-grade environment that can scale with the ...
Mission: To make people’s working lives simpler, more pleasant and more productive.

Slack Video

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Slack Reviews

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Approve of CEO
Stewart Butterfield
Stewart Butterfield
460 Ratings
Featured ReviewHelpful (1)
Slack icon

"A group of brilliant, warm and empathetic humans 🚀"

Current Employee - Manager – Technical Architect in New York, NY
Positive Outlook
Approves of CEO

I have been working at Slack full-time for more than a year


Culture encourages people to naturally be themselves, it stopped being classified as work for me a long time ago and more of a place my brain goes to think about people collaborate. Work life


It is a big responsibility to handle the collaboration of the size of customers we have, it is not necessary a negative but something to remember from time to time.

Advice to Management

Continue to hire the very best human beings on the planet 🌍
See All 560 Reviews

Diversity & Inclusion at Slack

(111 reviews)

Diversity & Inclusion FAQs

All answers shown come directly from Slack Reviews and are not edited or altered.

Does there seem to be diversity at Slack?

...What I find most admirable about Slack, however, is their ongoing and renewed commitment to helping those less fortunate and fostering diversity within the company....Read More

Read 10 more responses>

Slack Photos

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Slack Interviews

Getting an Interview
Applied online58%
Employee Referral22%

  1. [employerShortName] icon

    Platform Support Agent Interview

    Anonymous Employee in United States
    Accepted Offer
    Positive Experience
    Average Interview


    You can expect:

    1. One or two assignments to understand your communication, and ability to answer technical questions

    2. Take home coding test (relatively basic compared to a traditional software engineering interview)

    3. A somewhat grueling onsite (or these days, a remote Zoom). Expect to be interviewed for around 3 hours straight.

    Expect a basic take-home coding assignment to determine your ability to understand the essentials of platform development.

    Answer Question

See All 426 interviews

Company Updates

Company Logo for Slack


Jan 13, 2021


We are once again honored to be named one of the Best Places to Work by Glassdoor. Every day we get to work with the immensely smart, kind and wonderful humans that helped us achieve this. Thank you, friends. 🥳

Company Logo for Slack


Jun 30, 2020

'I wanted to share with you the wonderful opportunity Slack has given me to give back to my community. Five and a half years ago I was forced to flee my home country because of homophobia. When I arrived in the U.S. I hid, working in fast food and fearing a return to my country. Then I won the protection of asylum, the right to stay here thanks to Oasis Legal Services. I could finally embrace my life and return to the work I love, designing software. I found a community of friends, and eventually I found Slack which is extremely welcoming of the LGBTQ+ community.' — Gerson Garcia Pineda, Sr. Software Engineer, Test Automation, he/him


Slack Awards & Accolades

  • 2020 Glassdoor Best Places to WorkGlassdoor2020
  • Best Startup of the YearThe Crunchies2017

Slack FAQ

(36 Questions)

All answers shown come directly from Slack Reviews and are not edited or altered.

See questions about:

What is health insurance like at Slack?

...Slack offers employees great benefits, such fully paid health insurance, retirement plans, and even allowance for fitness reimbursement....

September 18, 2019

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Work at Slack? Share Your Experiences

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