Slack Overview

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

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.

Glassdoor Awards

Best Places to Work: 2021(#71), 2020(#69)

Company Updates

January 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. 🥳
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June 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
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Slack - Why Work With Us?

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 largest companies in the world. It is a new layer of the business technology stack where people can work together more effectively, connect all their other software tools and services, and find the information they need to do their best work. Slack is where work happens.

Ensuring a diverse and inclusive workplace where we learn from each other is core to Slack’s values. We welcome people of different backgrounds, experiences, abilities and perspectives. We are an equal opportunity employer and a pleasant and supportive place to work. Come do the best work of your life here at Slack.

For more information on how Slack makes teams better connected, visit

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Slack Reviews

Recommend to a Friend
Approve of CEO
Stewart Butterfield
Stewart Butterfield
497 Ratings
Featured Review
Current Employee, more than 1 year

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

Oct 19, 2020 - Manager – Technical Architect in New York, NY
Positive Outlook
Approves of CEO


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 625 Reviews

Slack Photos

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Slack Interviews

Getting an Interview
Applied online57%
Employee Referral22%

  1. Featured Interview

    Customer Success Manager Interview

    Anonymous Employee in Chicago, IL
    Accepted Offer
    Positive Experience
    Difficult Interview

    I applied through an employee referral I interviewed at Slack (Chicago, IL) in Jun 2020


    The interview process was thorough and very transparent. It started with a phone screen with a recruiter. It was conversational and didn’t feel uncomfortable at all. My recruiter also recently went through Slack’s interview process/virtual onboarding so I found it helpful to hear about her personal experience firsthand and it got me really excited about the opportunity. Next was a pretty intense chronological interview with two managers, including the hiring manager. This interview was about 90 minutes long and not only consisted of walking through my professional resume but also drilling into specifics such as why I selected my college and what each manager I’ve ever had would say about me! This felt like the most critical part of the interview process and luckily, I felt thoroughly prepped by my recruiter(s) beforehand. They let me know pretty quickly that I made it to the final round (a presentation) and were accommodating with giving me the time I needed to prep. The final interview was a multi-prompt presentation to three managers. Again, my recruiter met with me in advance to thoroughly review expectations, provide advice, and answer questions. All very helpful. The various presentation prompts felt like they were trying to gauge a number of different things — overall presentation style with customers, ability to answer questions on the fly, concrete examples of your success/personal process, and cultural fit. I was a little tight on time and did not get to ask many questions to the three managers at the end but luckily I was extended an offer shortly after. I was interviewing during the pandemic so I truly appreciated that my recruiter provided proactive updates every step of the way. She made the experience less stressful and very pleasant!

    1. Who was your manager (for every role) and what would they say your biggest strength and area of opportunity is?

    Answer Question

See All 463 interviews

Slack Awards & Accolades

  • 2020 Glassdoor Best Places to WorkGlassdoor2020
  • Best Startup of the YearThe Crunchies2017
  • Fastest Rising StartupThe Crunchies2016
  • Founder of the YearThe Crunchies2015

Pledges & Certifications

  • Veteran Hiring Commitment

    Committed to helping America's military veterans find work

  • Social Responsibility Pledge

    Formal programs or foundation to give back to communities

  • Diversity Commitment

    Has programs that support a diverse and inclusive workforce

  • Pledge to Thrive

    Taking steps to prioritize employee well-being

Popular Careers with Slack Job Seekers

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Slack FAQ

(49 Questions)

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

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What are perks and other benefits like at Slack?

...Great culture, nice perks, remote work, plenty of opportunities...

February 7, 2021

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