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Outage in Zulip

DDoS attack on Zulip Cloud

Resolved Major
December 18, 2023 - Started about 2 years ago
Official incident page

Incident Report

We are experiencing a DDoS attack and are working on it.

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Latest Updates ( sorted recent to last )
RESOLVED about 2 years ago - at 12/19/2023 04:42AM

This incident has been resolved.

MONITORING about 2 years ago - at 12/18/2023 11:10PM

We have mitigated the attack, and are monitoring the situation.

INVESTIGATING about 2 years ago - at 12/18/2023 10:09PM

We are continuing to investigate this issue.

INVESTIGATING about 2 years ago - at 12/18/2023 09:38PM

We are experiencing a DDoS attack and are working on it.

Latest Zulip outages

Service outage - about 1 month ago
Image thumbnailing delays - about 2 months ago
Push notification outage - over 1 year ago

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