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Slack

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Read 397 Slack reviews and testimonials from customers, explore 173 case studies and customer success stories, and watch 32 customer videos to see why companies chose Slack as their Internal Communications Software

Slack is building the platform that connects teams with the apps, services, and resources they need to get work done. Launched in 2014, Slack is the fastest growing business application in history. Millions of people around the world use Slack to bring their teams together, make sense of their work, and drive their business forward.

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  • 397 Testimonials View
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Customer Rating Review Score based on 5209 reference ratings
4.8/5.0 (5209)
  • Fall 2025 Market Leader Internal Communications Software
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    Workplace is a collaborative platform run by Facebook. It is built on Facebook's powerful systems that keep more than a billion people's information safe. It connects everyone in your organization to turn ideas into action and get more done.

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397Testimonials

  • "Slack is really a business-critical system for us. Without it, we would be back to email and instant messaging, which would be a massive downgrade."

    Richard Boon Tech Support Manager

  • “The more that we use Slack channels, the more it becomes valuable. We can search for and find what we talked about later too."

    Jeremy Wortsman Founder and director

  • "Now the company’s goals and issues are shared more openly and clearly across all parties concerned, regardless of their job categories. This has significantly strengthened each team member’s sense of …

    Hideo Kimura SVP of Engineering
396 more testimonials currently locked

173 Case Studies

  • How Ambit evolved on Slack

    Blair Woods Chief Technology Officer

  • Year Up deftly pivots to virtual programmes to serve motivated young adults …

    Kaysi Valencia Programme Director

  • Cvent powers world-class events with help from Slack

    Rachel Andrews Director of Meetings and Events
172 more case studies currently locked

32 Customer Videos

31 more videos currently locked

Additional Slack Information & Resources

Read Slack Reviews, Testimonials & Customer References from 397 real Slack customers.

Browse Slack Case Studies, Customer Success Stories, & Customer References from 173 businesses that use Slack.

Watch Slack Customer Videos to learn why 32 businesses chose Slack.

FeaturedCustomers has 1,910,028+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.