Substack Outage History
Uptime record, past incidents, and downtime history for Substack.
Checking current status...
90-Day Trend
Monthly Uptime
| Month | Uptime | Days Tracked | Days with Issues |
|---|---|---|---|
| July 2026 | 100% | 9 | 0 |
| June 2026 | 96.7% | 30 | 1 |
| May 2026 | 93.5% | 31 | 2 |
| April 2026 | 100% | 21 | 0 |
Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.
Daily Status (Last 91 Days)
Apr 10
Today
Operational
Degraded
Partial Outage
Major Outage
Maintenance
No Data
Incident History
June 2026
Delays in post delivery
Started: Jun 3, 1:58 PM
monitoring
A fix has been implemented and we are monitoring the results.
Jun 3, 2:16 PM
investigating
We are experiencing delays in post email delivery due to an outage from a third party service provider.
Jun 3, 1:58 PM
April 2026
Service degraded due to a provider.
Started: Apr 22, 7:12 PM
monitoring
A fix has been implemented and we are monitoring the results.
Apr 22, 7:45 PM
identified
The issue has been identified and a fix is being implemented.
Apr 22, 7:36 PM
investigating
We are experiencing an issue with a provider.
Apr 22, 7:12 PM
March 2026
Issue with reported open rates
Started: Mar 27, 10:20 PM
investigating
We’re investigating an issue affecting reported open rates for some publishers. Current evidence suggests this is related to how Gmail loads tracking pixels, and does not indicate a change in engagement or deliverability.
We take responsibility for ensuring these metrics are accurate and are prioritizing improvements to our open rate tracking so this is resolved as quickly as possible. We will continue to provide updates here as we learn more.
Mar 27, 10:20 PM