Is Slack down? Thousands report chat problems (Nov. 2025)

UPDATE Monday, 2:51 p.m. ET: Slack's problems on Monday appear to be resolving. User-reported issues on Downdetector had fallen precipitously from their earlier peak.

Slack's status page indicates that it has identified and begun fixing the issue. "Our work on this issue is still ongoing, and our health metrics continue to indicate improvement," reads its most recent update.

Thousands of people reported errors connecting to Slack around 1 p.m. ET on Monday, Nov. 10. Slack is a popular message platform in the corporate world, and the outage caused big problems for users starting their workweek.

Like many news outlets, Mashable reporters use Slack to communicate, and multiple members of the Mashable team reported receiving errors when trying to send new messages on Monday.

User error reports for Slack spiked on Monday afternoon on the platform Downdetector, with more than 15,000 incidents reported in just minutes. The initial spike started around 12:56 p.m. ET. (Disclosure: Downdetector and Mashable are both owned by the company Ziff Davis.)

According to a Slack status page, the company was investigating a "new incident."

At 1:26 p.m. ET, the company posted the following message: "Some users may have trouble connecting to or loading Slack. We'll provide an update within 30 minutes, including further details on current actions being taken."

As of this writing, Mashable reporters are able to connect to Slack, suggesting the outage may already be over for many users.

This is a developing story, and we'll provide updates as new information becomes available.