Incidentsby GlyphSlack outage history and postmortems
Apps and SaaS · San Francisco, US · 7 incidents in 90 days · 99.41% implied uptime · last 17d ago
History
About Slack
Slack Technologies, LLC is an American software company founded in 2009 in Vancouver, British Columbia, known for its proprietary communication platform Slack.
The last year, day by day
Downtime, added up
Slack: 12h 49m weighted downtime in range, category median 36m.
7 incidents, 0 major or critical, 10d 19h of incident time (0m major or critical, 10d 19h partial), longest 7d, implied uptime 99.41%, between Aug 12, 2026 and Nov 9, 2026.
Stated causes
34 incidents with no cause stated.
Across Glyph:Company profileCompliancePaydaysUptime
Questions
Is Slack down right now?
Check Slack's own status page at https://slack-status.com for the live state. This page shows Slack's incident history from that page; the most recent incident started 2026-10-22: "Slack Real-Time Connection Disruption".
How often does Slack have outages?
Slack posted 7 incidents in the last 90 days and 41 in the last year, 0 of them major or critical in the last 90 days. The median incident lasted 6h 20m.
When was Slack's last major outage?
2021-01-04: "Overloaded AWS Transit Gateway takes Slack down on the first workday of 2021", lasting 2h 18m.
What usually causes Slack incidents?
Where Slack explained the cause, the most common was deployment or rollout (3 incidents). Most status updates do not name a cause.