We check Substack from our servers and combine it with problem reports from visitors.
Substack problem reports, last 24 hours
Reports from visitors per hour, in your local time. When reports rise well above the usual level, Substack is probably having problems.
Having a problem with Substack?
Choose what isn't working. Reports are anonymous and help other people see if the problem is widespread.
Most reported problems
Recent reports
- No reports in the last 24 hours.
Our checks of substack.com
Each bar is one hour. Green: every check reached substack.com. Amber: some failed. Red: all failed. Grey: not checked that hour.
What to do if Substack is not working
- Pull down to refresh, then fully close and reopen the Substack app.
- Switch between Wi-Fi and mobile data. If Substack works on one but not the other, the problem is your network, not Substack.
- Try Substack in a web browser. If the website works but the app does not, update the app from your app store.
- Log out and back in only as a last resort: during an outage, logins often fail and you can get stuck signed out.
- Clear the app cache (Android: Settings → Apps → Substack → Storage) or reinstall the app on iPhone.
- If posts or uploads fail, wait a few minutes before retrying so you don't create duplicates.
Substack outage FAQ
Is Substack down for everyone, or just me?
Look at the status at the top of this page. We connect to substack.com directly from our servers, so if our check works but Substack doesn't work for you, the problem is more likely your device, network or account. If our check fails, or reports have jumped in the last hour, Substack is probably having a wider outage.
Why does this page say Substack is up when it isn't working for me?
Our check confirms that substack.com is reachable and responding. An outage can still affect only part of Substack, such as logging in, the mobile app or a single feature, or only some regions. That's why visitor reports matter: when many people report problems at once, we flag Substack as having problems even if the website loads.
How often do you check Substack?
We check Substack automatically several times a day, and again whenever someone opens this page and our last check is more than a few minutes old.
How do I report a Substack outage?
Use "Report a problem" on this page to tell us what isn't working. Reports are anonymous: we don't store your IP address, only a one-way code that stops the same person reporting many times, plus your country.