How much uptime did Slack have in September 2026?

Slack was up on 100% of the 100 checks we recorded in September 2026 — meaning it was not reporting an outage — and fully healthy, with no degradation reported, on 16%. This is a sample taken about once an hour, not continuous monitoring.

← Is Slack down right now?

Was Slack down in September 2026?

Not fully — Slack stayed up in September 2026, but reported 84 periods of degraded service.

We check Slack's official status page about once an hour and record what it reports. This page covers 100 checks across 17 days in September 2026.

September 2026 at a glance

100%

Uptime counts every check where Slack was not reporting an outage. It was fully healthy on 16% of checks, and reporting degraded service on the other 84.

operational degraded outage not monitored

Checks recorded: 100
All clear: 16
Degraded: 84
Outage: 0

Slack incidents in September 2026

Degraded service2026-09-01 04:56 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-01 09:57 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-01 14:45 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-01 18:23 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-01 21:43 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 00:00 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 04:18 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 09:29 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 14:21 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 18:35 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-02 21:45 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 00:04 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 04:16 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 09:39 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 14:25 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 18:32 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 21:39 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-03 23:58 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 04:20 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 09:31 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 14:14 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 18:18 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 21:22 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-04 23:57 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 04:15 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 08:58 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 12:36 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 15:58 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 18:10 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 21:07 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-05 23:47 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 04:25 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 09:18 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 13:35 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 16:55 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 19:03 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 21:15 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-06 23:46 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-07 04:24 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-07 10:09 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-07 16:24 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-07 20:29 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-07 23:27 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-08 04:24 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-08 09:33 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-08 14:24 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-08 18:32 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-08 21:46 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 00:05 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 04:33 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 09:36 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 14:27 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 18:30 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-09 21:38 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 00:05 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 04:33 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 09:35 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 14:18 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 18:19 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-10 21:34 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 00:01 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 04:27 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 09:32 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 14:19 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 18:23 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-11 21:40 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 00:09 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 05:38 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 10:37 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 14:00 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 16:58 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 19:11 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-12 22:11 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 00:52 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 05:58 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 11:40 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 16:08 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 19:21 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-13 22:21 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-14 00:57 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-14 06:05 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-14 12:37 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-14 18:32 UTC
Lasted under 1 hour across 1 consecutive check.
Degraded service2026-09-14 22:25 UTC
Lasted under 1 hour across 1 consecutive check.

How we measure this

About once an hour we read Slack's official status feed and record exactly what it says — we don't infer status from our own connection to them. When the feed can't be read, we record nothing rather than guess, so a gap in the chart above means “not monitored”, never “down”.

Uptime is the share of the 100 recorded checks where Slack was not reporting an outage — a provider flagging degraded service is still up. Providers often sit at “degraded” for days over one small component, so counting that as downtime would say a service was offline all month when its own page said nothing of the kind. Degradation is reported separately, in the figures above and the timeline below.

This is a sample, not continuous monitoring: an incident that started and finished between two checks won't appear here, and a run can be missed. Treat these figures as what Slack was reporting at the moments we looked — the official page is the authority. Official Slack status page →

Slack outage history by month

September 2026 August 2026