Sunday April 11, 2021


Performance issues, including sending messages and viewing threads

Issue summary:
On April 11, 2021 around 6:00 p.m. to around 7:30 p.m. PDT, some users encountered degraded performance in Slack. This included trouble sending messages, viewing threads, using search, and creating shared channel invitations.

We addressed a performance issue within our infrastructure that was preventing some servers from responding to requests as expected. We then saw errors subside, and affected users could use Slack once again.

4:43 PM PST

Everything should be running smoothly once again. Please let us know if you are still experiencing any trouble over at Thank you for bearing with us.

7:56 PM PST

We’re still investigating the issue, but we don’t have additional information just yet. We’ll be back in 30 minutes with another update. Thank you for your patience.

7:26 PM PST

Some customers may be unable to send messages or load threads in Slack. We're very sorry for the disruption. We're working to resolve this fast as we can, and we'll back in 30 minutes with an update.

6:56 PM PST

Services affected