Delta's Polis

Σmind

Deliberately small, for the first few months.

Long-form writing platforms work or don't work based on the first hundred people who show up. We're choosing ours carefully — by invitation, through late autumn 2026, after which the gate comes down.

If a current member has sent you a code, paste it below. If you've been writing somewhere already and want in, send us a link to your work; we read everything that comes through and reply within 5 working days.

Terms and Policies

Please review and accept our terms to continue:

I accept the Terms of Service

I accept the Privacy Policy

I accept the Writing Guidelines

Invitation Code

You need an invitation code to join.

Age Confirmation

I confirm that I am aged 18 or over, or that I am aged 13–17 and have parental/guardian consent to use this platform

SigmaMind is a profile-based social network primarily aimed at users aged 18 and over. While we moderate the site to ensure it is safe for all users, it contains user-generated content.

Email Updates (optional)

Send me Σmind announcements and product updates

Optional. You'll still get transactional email regardless (account verification, password resets, security alerts, receipts). Change this anytime in Settings.

Security Verification

Please complete the security verification below:

By completing registration, you confirm that you are authorized to accept these terms on behalf of yourself or your organization.

Cookie Preferences

Welcome

Terms & Conditions Updated