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Slack stock is down 12% after its first earnings as a public company, in which it posted a big loss — including $8 million in credits to customers after outages

Slack co-founders Cal Henderson, left, and Stewart Butterfield pose for photos outside the New York Stock Exchange before their company's IPO, Thursday, June 20, 2019. (AP Photo/Richard Drew)
The Slack cofounders Cal Henderson, left, and Stewart Butterfield outside the New York Stock Exchange on June 20 before their company's initial public offering. Associated Press
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The collaboration and messaging app Slack saw its stock slide 12% on Wednesday after it announced its first quarterly earnings as a public company.

Its share price plunged to $26 after the bell — the same price at which Slack originally priced its shares when it went public in June. The cause may at least in part be that Slack is now projecting losses for the next quarter of $0.08 to $0.09 a share, a bit higher than the $0.07 projected by Wall Street.

Its revenue in the second quarter grew 58% from the same period last year, up to $145 million. It posted a net loss of $359.6 million, however, including $8.2 million in credits it spent related to service disruptions in the quarter — in other words, credits given to customers to make up for outages and other interruptions to its service.

In July, Slack was down for about an hour, affecting its business customers around the world.

Slack's CEO and cofounder, Stewart Butterfield, said on the earnings call that the company had been investing in monitoring for these types of service interruptions. He said that while Slack's technology might seem simple from the outside, there's a lot of complexity under the hood that made the task trickier.

"The bottom line is, there are investments on an ongoing basis," Stewart said. "With our biggest customers, it's not just hundreds of millions of messages going on and every day, it's the other little changes, like people going online, offline, creating a new channel, or changing their status."

Here's what Slack reported:

  • Revenue: $145 million. Analysts were expecting $140.72 million.
  • Net loss per share: $0.14. Wall Street was looking for $0.18.
  • Revenue (next quarter): $154 million to $156 million. Analysts had predicted $153.19 million.
  • Net loss per share (next quarter): $0.08 to $0.09. Wall Street was forecasting $0.07.

Slack ended the quarter with more than 100,000 paid customers, rising 37% year-over-year.

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Rosalie Chan
Rosalie Chan is a senior editor for Business Insider's tech team. Previously, she covered cloud computing and enterprise tech, reporting on companies like Google Cloud, Amazon Web Services, Microsoft, Intel, Alibaba Cloud, Atlassian, GitHub, VMware, Broadcom, and more. She has written extensively on topics including cloud computing, developer companies, open source, and sexism and sexual harassment in the tech industry. She has received the San Francisco Press Club award for continuing coverage for her reporting on sexism and sexual harassment in Silicon Slopes and the Excellence in Business / Consumer / Tech Reporting award from the Asian American Journalists Association for her investigation into the coding boot camp Holberton School. Most recently, she was an editor on the Business Insider investigative package, The True Cost of Data Centers, which received a George Polk Award and an honorable mention from SABEW.Rosalie joined Business Insider after working as a software engineer and freelance journalist. She studied journalism, computer science, and technology and business law at Northwestern University. Her work has previously appeared in TIME, the Huffington Post, VICE, Pacific Standard, Inverse, Chicago magazine, the Chicago Reporter, and more. She's based in San Francisco.