Privacy Policy

Effective 26 May 2026

Who we are

Sufficient Certainty Pty Ltd ("we", "us") operates sufficientcertainty.com and the Walk decision-coaching service.

What we collect

• Email address — when you start a Walk or subscribe to updates.
• Walk conversation data — the decisions, options, assumptions, and other inputs you provide during a Walk session.
• Payment information — processed by Stripe. We do not store card numbers.
• Analytics — anonymous page-view and event data collected by Umami (no cookies, no personal data, self-hosted).

How we use it

• To deliver your Walk session and generate your Decision Record.
• To send your 30-day check-in email (one follow-up, then we stop).
• To process payments securely through Stripe.
• To improve the service based on aggregate, anonymised usage patterns.

What we do not do

• We do not sell, rent, or share your personal data with third parties for marketing.
• We do not use tracking cookies or fingerprinting.
• We do not train AI models on your Walk conversations.

Data storage and retention

Walk data is stored in a Supabase-hosted PostgreSQL database. We retain your Walk data for as long as you need access to your Decision Record. You may request deletion at any time.

Your rights

You can request a copy of your data, ask us to correct it, or ask us to delete it. Contact us and we will respond within 30 days.

Third-party services

• Stripe — payment processing (their privacy policy).
• Umami — privacy-friendly, cookieless, self-hosted analytics (about Umami).
• PostHog — product analytics, session recordings, and heatmaps. Uses cookies to link sessions across subdomains (their privacy policy).
• Resend — transactional email delivery.
• Vercel — website hosting.

Contact

For privacy-related questions, reach us through our LinkedIn page.

Changes

We may update this policy. Material changes will be noted on this page with a revised effective date.