Last updated: August 17, 2026

Privacy policy

Short version: we collect what you give us to book a call and run an engagement, we run no ad trackers, and your code is handled under NDA by the two people named in your engagement.

Who we are

Provingmark is a two-person engineering firm working on systems that move money: execution, risk limits and settlement.

What we collect

Booking data. When you book a call, cal.com collects your name, email, and anything you add to the booking form, and shares it with us to run the call. cal.com's own privacy policy applies to their processing.

Correspondence. Emails and messages you send us.

Engagement data. If you become a client, we access your repository and infrastructure read-only, after an NDA is signed, for the scope defined in your engagement. Access is limited to the two people named in that engagement and is revocable by you at any time.

Analytics. This site currently ships no analytics or advertising trackers. If we add privacy-respecting analytics later, this policy and a consent banner will be updated first.

How we use it

To respond to you, deliver contracted work, invoice, and meet legal obligations. Legal bases where GDPR/UK GDPR applies: performance of a contract, legitimate interest in responding to enquiries, and legal compliance.

Sharing

We do not sell personal data. Service providers that process data to run this site and business:

  • Vercel: website hosting
  • cal.com: call scheduling

Retention

Enquiry data: as long as the conversation is live plus a reasonable follow-up period. Engagement records: as required for tax and contract purposes. Repository access is revoked at engagement end, and working copies of client code are deleted within 30 days of that date unless your contract says otherwise.

Your rights

Where GDPR/UK GDPR applies you can request access, correction, deletion, portability, or object to processing. Reach us through the route in the Contact section below and we'll respond within a month.

Changes

We'll update this page when practices change and bump the date above. Material changes to how engagement data is handled are communicated to active clients directly.

Contact

Contact details are available on request via the booking page.