Thursday December 16, 2021

Issue summary: On December 16, 2021 from 5:14 p.m. to 5:50 p.m. PST, some customers were unable to log in to Slack and load channels or messages. We made a change to the web application which caused an unanticipated surge in traffic to one of our internal resources. We corrected the issue on the backend and all affected customers were able to load Slack again.

3:58 AM PST

We believe the issues with loading Slack have now been resolved. If you continue to have any trouble, please reach out to us at feedback@slack.com.

6:04 PM PST

Customers may be experiencing issues with loading Slack. We're currently investigating, and we'll share updates as we have more information. We're sorry for the disruption.

5:27 PM PST