All Systems Operational

Uptime over the past 90 days. View historical uptime.
Substack publications Operational
90 days ago
100.0 % uptime
Today
Writer dashboards Operational
90 days ago
100.0 % uptime
Today
Email delivery Operational
90 days ago
100.0 % uptime
Today
Subscription invoice processing Operational
90 days ago
100.0 % uptime
Today
Substack.com Operational
90 days ago
100.0 % uptime
Today
Push Notifications Operational
90 days ago
100.0 % uptime
Today
Custom domains Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

May 20, 2026

No incidents reported today.

May 19, 2026

No incidents reported.

May 18, 2026

No incidents reported.

May 17, 2026

No incidents reported.

May 16, 2026

No incidents reported.

May 15, 2026

No incidents reported.

May 14, 2026

No incidents reported.

May 13, 2026
Scheduled database maintenance
Completed - The scheduled maintenance has been completed.
May 13, 22:39 PDT
Verifying - Verification is currently underway for the maintenance items.
May 13, 22:28 PDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
May 13, 22:00 PDT
Scheduled - We will be performing a maintenance on the database. Expected downtime is about 5 minutes.
May 11, 20:37 PDT
May 12, 2026

No incidents reported.

May 11, 2026
Issue with reported open rates
Resolved - This incident has been resolved.
May 11, 10:55 PDT
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, 15:20 PDT
May 10, 2026

No incidents reported.

May 9, 2026

No incidents reported.

May 8, 2026

No incidents reported.

May 7, 2026

No incidents reported.

May 6, 2026

No incidents reported.

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