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
99.99 % uptime
Today
Email delivery Operational
90 days ago
99.88 % 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.

Jan 15, 2026
Issues loading Notes
Resolved - This incident has been resolved.
Jan 15, 04:50 PST
Monitoring - A fix has been implemented and we are monitoring the results.
Jan 15, 04:47 PST
Investigating - We're currently investigating an issue affecting load times of notes and inboxes
Jan 15, 04:35 PST
Jan 14, 2026
Elevated latencies
Resolved - This incident has been resolved.
Jan 14, 12:47 PST
Monitoring - A fix has been implemented and we are monitoring the results.
Jan 14, 11:25 PST
Investigating - Substack is experiencing elevated latencies. We are working to investigate the issue.
Jan 14, 09:38 PST
Jan 13, 2026

No incidents reported.

Jan 12, 2026

No incidents reported.

Jan 11, 2026

No incidents reported.

Jan 10, 2026

No incidents reported.

Jan 9, 2026

No incidents reported.

Jan 8, 2026

No incidents reported.

Jan 7, 2026

No incidents reported.

Jan 6, 2026

No incidents reported.

Jan 5, 2026
Delays in audio read-aloud processing.
Resolved - This incident has been resolved.
Jan 5, 21:36 PST
Investigating - We're experiencing a delay in processing the automated read-alouds for posts in the apps.
Jan 5, 09:17 PST
Jan 4, 2026

No incidents reported.

Jan 3, 2026

No incidents reported.

Jan 2, 2026

No incidents reported.

Jan 1, 2026

No incidents reported.

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