All Systems Operational
Uptime over the past 90 days. View historical uptime.
Substack publications Operational
90 days ago
99.97 % uptime
Today
Writer dashboards Operational
90 days ago
99.97 % uptime
Today
Email delivery Operational
90 days ago
99.97 % uptime
Today
Subscription invoice processing Operational
90 days ago
99.97 % uptime
Today
Substack.com Operational
90 days ago
99.95 % uptime
Today
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.

Past Incidents
Sep 22, 2021
Elevated latency and error rate
Resolved - Substack website was experiencing issues, some pages took a long time to load or timed out.
Sep 22, 12:20 PDT
Sep 21, 2021

No incidents reported.

Sep 20, 2021

No incidents reported.

Sep 19, 2021

No incidents reported.

Sep 18, 2021

No incidents reported.

Sep 17, 2021
Issues Displaying Publisher Statistics
Resolved - This incident has been resolved.
Sep 17, 15:10 PDT
Identified - The issue has been identified and a fix is being implemented.
Sep 17, 14:32 PDT
Investigating - We're aware of a problem in presenting usage stats to publishers. Engineers are working on resolving the problem.
Sep 17, 14:31 PDT
Sep 16, 2021
Delayed email sending for some publications
Resolved - We are working to resolve an issue with delayed email sends.
Sep 16, 12:30 PDT
Sep 15, 2021

No incidents reported.

Sep 14, 2021

No incidents reported.

Sep 13, 2021

No incidents reported.

Sep 12, 2021

No incidents reported.

Sep 11, 2021

No incidents reported.

Sep 10, 2021
Elevated error rate
Resolved - We are recovering from an incident involving elevated error rates sitewide from 3:00am-4:50am PDT.
Sep 10, 03:00 PDT
Sep 9, 2021

No incidents reported.

Sep 8, 2021

No incidents reported.

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