All Systems Operational

Uptime over the past 90 days. View historical uptime.
Substack publications Operational
90 days ago
99.99 % uptime
Today
Writer dashboards Operational
90 days ago
99.99 % uptime
Today
Email delivery Operational
90 days ago
99.99 % uptime
Today
Subscription invoice processing Operational
90 days ago
99.99 % uptime
Today
Substack.com Operational
90 days ago
99.99 % uptime
Today
Push Notifications Operational
90 days ago
99.99 % 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.

Jul 1, 2025

No incidents reported today.

Jun 30, 2025

No incidents reported.

Jun 29, 2025

No incidents reported.

Jun 28, 2025

No incidents reported.

Jun 27, 2025

No incidents reported.

Jun 26, 2025

No incidents reported.

Jun 25, 2025

No incidents reported.

Jun 24, 2025

No incidents reported.

Jun 23, 2025
Substack Availability Issue
Resolved - This incident has been resolved.
Jun 23, 22:19 PDT
Update - Continuing to bring systems back online. Writer dashboard stats including open rates may be delayed or temporarily inaccurate.
Jun 23, 11:14 PDT
Monitoring - Restored functionality on Substack.com and app. We are continuing to work on a fix for some delays in email delivery.
Jun 23, 11:04 PDT
Identified - The issue has been identified and a fix is being implemented.
Jun 23, 10:51 PDT
Investigating - We are currently investigating a higher error rate when trying to load Substack
Jun 23, 10:45 PDT
Substack Availability Issues
Resolved - This incident has been resolved.
Jun 23, 10:22 PDT
Monitoring - A fix has been implemented and we are monitoring the results.
Jun 23, 09:57 PDT
Identified - The issue has been identified and a fix is being implemented.
Jun 23, 09:56 PDT
Investigating - We are currently investigating a higher error rate when trying to load Substack
Jun 23, 09:50 PDT
Jun 22, 2025

No incidents reported.

Jun 21, 2025

No incidents reported.

Jun 20, 2025

No incidents reported.

Jun 19, 2025

No incidents reported.

Jun 18, 2025

No incidents reported.

Jun 17, 2025

No incidents reported.

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