Outage in Substack
Issue with reported open rates
Resolved MinorIncident Report
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.
Components affected
Substack Email deliveryTrusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
RESOLVED
6 days ago - at 05/11/2026 05:55PM
This incident has been resolved.
INVESTIGATING
about 2 months ago - at 03/27/2026 10:20PM
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.
Latest Substack outages
Service degraded due to a provider. - 25 days ago
We're aware of an issue causing delays in publisher stats - 3 months ago
Publisher Stats Loading - 3 months ago
Substack Availability Issues - 3 months ago
Substack Availability Issues - 3 months ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
