Slack Says It Fixed Slowdown That Sidelined Some Workers

Slack, the widely used business communication tool, experienced slowdowns in service on Tuesday, frustrating workers who have become increasingly dependent on it as they work from home.

Users complained of slow messages or messages that were not sending starting around 8 a.m. Eastern.

At 8:10 a.m., the company apologized and said it was investigating the problem. At round 9:48 a.m., Slack said it appeared that most of the problems had been fixed.

“The performance issues we’ve been seeing should be mostly resolved, and there should no longer be any issues with messaging,” the company said in a statement. “However, users may still see some errors as we work to fully fix the issue. We’ll let you know when we’re confident this is fully resolved.”

By 11:30 a.m., the company said there were no new reports of problems.

“Users should have no issues sending messages or connecting,” the company said.

The communication platform has grown in recent years as an essential workplace tool, with more than 10 million users, many of them in media organizations, who flock to other platforms like Twitter to complain when there’s an outage. More than 750,000 companies use the service, according to Slack.

“We know how important it is for people to stay connected and we are working hard to get everyone running as normal,” a company spokesman said in an email that urged users to monitor the company’s website for updates. The company did not explain what caused the slowdown.

Slack has touted itself as an alternative to email and as a more efficient way for companies to communicate with employees. But with its frequent pings and notifications, workers and employers have said that Slack can hurt productivity.

Workers have also complained that its notification system pressures them into working during their off hours or