Messaging app Slack hit by major global outage

The popular communication platform Slack, essential for millions in their daily work and chat interactions, is grappling with "error spikes" that are thwarting a host of its vital features—from opening channels and sending messages to app functions and even starting up the Slack client.

In an update to users, Slack admitted: "Our investigation is ongoing, but we have determined that our backend database routing is contributing to error spikes with many Slack features."

Engineers are on the case, with the company however cautioning that it's uncertain when normal service will resume, highlighting:

"We are working at identifying impact, resolving routing issues, and are closely monitoring error rates."

Initially reported as a global outage hitting all users, Slack's analysis shows it's a widespread rather than universal glitch, noting: "This is not limited to a region and is impacting a percentage of users globally.

"We are working to determine full impact. (EDIT: We previously mentioned all users were affected and have adjusted to more accurately reflect the situation)."

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Since Slack experienced downtime, users have encountered numerous issues such as:, reports .

Challenges in getting the application to start.

Unsent messages.

Channels and threads failing to load.

Problems with integrated .

Meanwhile, Slack has informed its users that no quick fixes are available right now.

Vowing to stay transparent, Slack concluded: "We'll continue to provide updates every 30 minutes until the impact is resolved for all users."

UPDATE 13.05.25 21.39 EST: Slack is now running after significant disruption was brought under control, according to the company website.