Why Does Substack Keep Logging Me Out? Login Problems and How to Recover

Why does Substack keep logging me out? #

Substack's own pages point to a short list of causes: how sign-in works, a changed email address, two-factor codes, age checks and site problems. According to Substack's Help Center (read 3 October 2026), you sign in with an emailed verification code or link, or with a password if you set one, and changing your email signs you out of the website and the app. The pages read describe no unusual-login or new-device screen.

When two accounts share one computer, one more cause appears that Substack's pages do not name: both accounts sit in the same browser profile. This guide covers that case, the documented causes and the official recovery steps.

Which causes does the Help Center name, and what fixes each? #

What changes when two accounts share one browser profile? #

Substack's Privacy Policy says the website uses cookies, and that its essential cookies are what let it remember your login details. Chromium's documentation says each profile folder holds its own cookies. Together that means one browser profile carries one remembered login for substack.com, so signing in to a second account there can look like being logged out of the first. The pages read describe no way to keep two accounts signed in inside one profile.

Three habits remove this cause:

• One browser profile per account. The profiles guide shows the steps in Chrome, and what a browser profile is explains what a profile keeps apart.
• Sign in where you are working. Each sign-in email carries a code and a link. If you read the email in a different browser or app from the one you are signing in with, the link opens where the email is, not where you started; pasting the code into the right profile avoids that.
• Sign out on shared computers. The Privacy Policy tells users to limit access to their device and browser by signing off when they finish.

Does Substack run security checks on sign-in? #

The pages read name no sign-in alert, no list of trusted devices and no control for signing out other devices. They do describe three things:

• A code or link at sign-in, or a password, plus optional two-factor authentication through an authenticator app.
• Age verification in the UK and Australia, by selfie or, after several failed selfie attempts, a government ID. Subscribers with a credit card on their account are verified automatically. UK verification is optional, but without it blurred content and blocked features can continue; Australian users not verified as over 16 cannot hold an account.
• Background monitoring. The Privacy Policy says Substack collects information about the browser or device you use, including your IP address, and monitors user accounts to prevent, investigate and report fraud, misrepresentation, security incidents and crime in accordance with applicable law. It does not say what triggers a prompt, so there is no official list of triggers to work from.

The Terms of Use add a rule that matters on shared computers: allowing someone else to log in as you, or sharing your account or password, counts as putting account security at risk. Give colleagues their own accounts and a role on the publication instead; the team access guide explains how.

How do you get back in, step by step? #

1. Go to substack.com/sign-in and type the exact address you subscribed with. A different address may belong to a different account.
2. Choose the emailed verification code (copy it into Substack or select the link in the same email) or your password.
3. If no email arrives, work through the table above: spam, Promotions, the spelling of the address, no-reply@substack.com in your contacts.
4. If you forgot your password, use the Forgot Password page; Substack emails you a link to set a new one.
5. If you lost your authenticator app, answer the recovery questions you set up earlier to reset two-factor authentication.
6. If you lost access to your email address or cannot remember which one you used, open substack.com/support and start with the chatbot.
7. Once you are back in, turn on recovery questions in Settings, Security section. The Help Center says this makes it "much more likely that we'll be able to grant you access again."

What if it still fails? #

• Support. The Help Center says the chatbot comes first and, if it cannot answer, it creates an email ticket. Paid creators (publications with paid subscriptions enabled) are quoted a reply within 24 hours, weekends and holidays included; free publications, subscribers and general questions are prioritised by urgency, such as payment or access problems.
• Deleted by mistake. The Terms of Use say to contact tos@substackinc.com immediately; Substack will try to help but cannot promise to restore anything.
• Account restricted or closed. The Terms say Substack may end or suspend an account at its discretion. The pages read describe no separate appeal form, so write to Support and read the rules guide.

Where ADSSPEED fits #

ADSSPEED is a desktop app for Windows and macOS that manages many browser profiles. Because every profile keeps its own cookies, local data and browser settings, signing in to one account does not sign out another account you manage in a different profile. Profiles can be opened, stopped and organised in bulk, and profile data stays on your own computer. ADSSPEED removes no sign-in step: you still receive and enter codes as the Help Center describes, and recovery still goes through Substack Support. Setup is in installing ADSSPEED on Windows. ADSSPEED is not affiliated with Substack.