Privacy Policy
Last updated 12 November 2026
Draft. This page describes how the service works today but has not yet been reviewed by a lawyer, and some details below are still to be filled in.
CAD-wise lets you describe a change to a CAD drawing, preview it, and download the edited file. This page explains what personal information we handle when you use it. It is run by Zentriva. Questions or requests: chester.nt@zentriva.online.
What we collect
- Your email address, so you can sign in with a one-time link or with Google. If you use Google, we ask it only for your email address and whether Google has verified it. We receive nothing else, and we never see your Google password.
- Your choice about product updates, and the date you made it (see "Marketing" below).
- Your account details: when the account was created, and your credit balance.
- A sign-in key for each device you use. We keep only a scrambled (hashed) copy; the real key stays in your browser.
- Your drawings and the requests you type. These are processed in memory to make the preview and the edited file. We do not save your drawings or your requests.
- Survey calculator data (coordinates, bearings, levels and point lists you type, paste or load). These are processed in memory to work out the result and the drawing. We do not save them. The calculators use fixed formulas on our server, not an AI model, and nothing from them is sent to an AI provider.
- Standard server logs kept by our hosting provider (such as time, address of the request and which page was requested). We do not log the contents of your drawings.
Why we use it, and our legal basis
- To run your account and give you the service (performing our agreement with you).
- To keep the service secure and prevent abuse, such as limiting repeated sign-in requests (our legitimate interest).
- To send product updates and offers, only if you ticked the box (your consent, which you can withdraw at any time).
Marketing
Signing up does not require you to receive marketing. The box is unticked by default. If you tick it, we may email you about CAD-wise updates and offers, including offers from partners that we choose to tell you about ourselves. Every such email will include a way to unsubscribe, and you can also switch it off in your account. We do not sell your email address, and we do not give it to other companies for their own marketing.
Drawings and AI
Simple requests are understood by rules running on our server. For harder requests we may send your typed request and the layer names of your drawing (not the drawing's geometry or the file itself) to an AI provider, currently Anthropic, to work out which edits you mean. Please do not upload drawings you are not allowed to share, and avoid putting confidential details in layer names or requests.
Who else handles your information
We use these services to run CAD-wise. They process data on our behalf:
- Render: hosting the service.
- Neon: the database that stores accounts.
- Resend: delivering sign-in emails.
- Google: only if you choose "Continue with Google". Google then handles that sign-in under its own privacy policy.
- Anthropic: understanding harder requests, only when that is needed (see above).
- A payment provider, if and when paid credits are added. This page will be updated first.
These providers may process data in other countries, including the United States and the European Union. We do not otherwise share your personal information, except where the law requires it.
How long we keep it
- Your account stays until you delete it. Deleting removes your email, sign-in keys and account record.
- Sign-in links expire after a short time, and old ones are cleared automatically.
- Hosting logs are kept by the hosting provider under its own schedule.
Your rights
You can see what we hold about you with "Download my data" in your account, delete your account with "Delete my account", and change your marketing choice at any time. You can also ask us to correct your information, or complain to your local data-protection authority. Write to chester.nt@zentriva.online and we will respond.
Cookies and browser storage
We store your sign-in key in your browser's local storage so you stay signed in. We do not use advertising or tracking cookies, and we do not run third-party analytics.
Security
Connections use HTTPS, we store only hashed copies of sign-in keys and links, and there are no passwords to leak. No system is perfectly secure, so please tell us at chester.nt@zentriva.online if you notice a problem.
Children
CAD-wise is for professionals, students and hobbyists. It is not meant for children under 16, and we do not knowingly collect their information.
Changes
If we change this policy in a way that matters, we will update the date above and, for significant changes, tell signed-in users.