CheckUpstream has measured Slack at 100.000% uptime over the last 90 days and 99.908% over the last 12 months. 24 incidents were recorded in the past 12 months; the most recent resolved 3 days ago after 2 hours. Status signals are polled from Slack's official status feed, alongside independent probes and community reports.
180 days uptime
99.813%
177 of 180 days clean · 8h 5m total downtime
Downtime like this can be refundable
If you're a paying Slack customer, outages in these windows may count against Slack's SLA — vendors owe service credits for missed uptime targets, but only if you file inside the deadline. CheckUpstream tracks the entitlement, drafts the claim, and hands you the filing link.
Track your Slack entitlement →Live status pill for Slack. Updates automatically — no maintenance, no API key.
PREVIEW
Drop into any HTML page — README, docs, vendor homepage. No iframe, no dependencies.
<script src="https://checkupstream.com/embed/badge.js?service=slack"></script>Self-contained, CSP-friendly. Theme + size are query params; revalidates every 60s.
<iframe src="https://checkupstream.com/embed/slack" style="border:0;width:260px;height:44px" loading="lazy" title="Slack status badge"></iframe>GitHub READMEs, GitLab, MDX docs — links to the live reliability page.
[](https://checkupstream.com/reliability/slack)Useful for status-page composers (Notion, Slab, custom dashboards) that accept image URLs.
https://checkupstream.com/embed/slack/badge.svgSlack is currently Operational. CheckUpstream tracks Slack in real-time across the official status page, RSS / Atom feeds, and community telemetry — refresh this page for the latest reading.
Slack's last resolved incident started 3 days ago and lasted 2h 27m (a partial outage).
Looking for the live "is Slack down" view? See the Slack Status page.
Jun 17, 22:33 UTC · resolved in 5h 42m · Resolved
Jun 11, 22:13 UTC · resolved in 1h 7m · Resolved
Jun 3, 16:33 UTC · resolved in 1h 7m · Resolved
Jun 3, 00:58 UTC · resolved in 56m · Resolved
Jun 1, 02:08 UTC · resolved in 1h 2m · Resolved
May 27, 23:02 UTC · resolved in 27m · Resolved
May 27, 23:00 UTC · resolved in 16h 25m · Resolved
May 19, 20:51 UTC · resolved in 1h 38m · Resolved
May 14, 14:37 UTC · resolved in 1h 3m · Resolved
May 11, 14:09 UTC · resolved in 11m · Resolved
May 8, 18:31 UTC · resolved in 4h 59m · Investigating
May 8, 12:13 UTC · resolved in 5h 31m · Resolved
Slack's 30-day customer-perceived uptime is 99.813%. The figure is weighted (full-outage = 1.0, degraded = 0.3) so component blips don't collapse the score the way a raw incident-count would.
Sign up to CheckUpstream and add Slack to a watchlist. We send incident alerts via Slack, email, webhook, or PagerDuty within seconds of detection — covering both the official status page and community signals (HN, Reddit, Bluesky, Cloudflare Radar).
We poll Slack's official status page on a 1-5 minute cadence, parse its RSS / Atom feed as a fallback, ingest community signals from social platforms, and aggregate per-org SDK telemetry. Multiple sources reduce false positives versus any single feed alone.