Outage in Substack

Substack experiencing increased latency

Resolved Minor
September 15, 2025 - Started about 1 month ago - Lasted about 4 hours
Official incident page

Incident Report

We are currently investigating reports of increased latency and slow response times across Substack.

One place to monitor all your cloud vendors. Get instant alerts when an outage is detected.

Try IsDown risk-free 14-day free trial · No credit card required
Latest Updates ( sorted recent to last )
RESOLVED about 1 month ago - at 09/15/2025 07:12PM

This incident has been resolved.

MONITORING about 1 month ago - at 09/15/2025 06:39PM

Substack is operating normally and our team is monitoring.

IDENTIFIED about 1 month ago - at 09/15/2025 05:43PM

We are seeing recurrence of increased error rates and degraded performance across Substack.

MONITORING about 1 month ago - at 09/15/2025 04:53PM

As part of the earlier incident, we are noting delays in analytics updating and post email delivery. We are working to resolve the issue.

MONITORING about 1 month ago - at 09/15/2025 04:46PM

We are seeing recovery of performance across Substack and are monitoring the issue.

IDENTIFIED about 1 month ago - at 09/15/2025 04:38PM

We are working to resolve the remaining performance issues across Substack and expect to see recovery shortly.

IDENTIFIED about 1 month ago - at 09/15/2025 03:50PM

We are continuing to investigate increased latency and error rates across Substack.

IDENTIFIED about 1 month ago - at 09/15/2025 03:42PM

We have identified an issue and are seeing normal performance across all systems.

INVESTIGATING about 1 month ago - at 09/15/2025 03:34PM

We are continuing to investigate increased latency and error rates across Substack.

INVESTIGATING about 1 month ago - at 09/15/2025 03:24PM

We are currently investigating reports of increased latency and slow response times across Substack.

Latest Substack outages

Delay in sending scheduled posts - about 2 months ago
Livestream creation not working - about 2 months ago

The Status Page Aggregator Built for IT Teams

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 trial

No credit card required · Cancel anytime · 4522 services available

Integrations with Slack Microsoft Teams Google Chat Datadog PagerDuty Zapier Discord Webhook