Cert

Privacy

What we do with your data

Last updated 29 July 2026

The short version

We have no accounts, so there is nobody to identify. The browser extension reads a page only when you click it, sends the text to be valued, and keeps none of it unless you save the car. The website stores the searches you make and the cars you save, so both survive a reload and can be shared by link.

The browser extension

When you click the icon on a listing, the extension reads the visible text of that page and sends it to our valuation service, which returns a price. That is the whole exchange.

  • It has no standing access to any website. It can read a page at the moment you click and not before, and nothing of it runs on a listing until then.
  • The page text is used to produce the valuation in that response and is not written to a database or used to train anything.
  • It does not read your browsing history, your tabs, your cookies or anything you are signed into.
  • The one thing it does without being asked is tell this website that it is installed, so we stop suggesting you install it.
  • If you save a car, that valuation is kept — see below. Nothing else from the page is.

The website

Describing what you are looking for creates a search we store so the page can be reloaded and shared. It holds what you typed and the shortlist built from it, and is not linked to a person.

Pasting a listing link stores the reading we took from that page for six hours, so the same link pasted twice does not cost a second fetch. A screenshot you send is read and discarded; it is never stored.

Saving a car keeps that valuation — the vehicle, the asking price, what we thought it was worth, and the advert’s address — on a list identified by an unguessable link. There is no account, so that link is the only key to it: anyone who has it can read and change the list, and anyone without it cannot find it. Your browser remembers the link so the extension can add to the same list next time.

Who else sees it

Listing text and screenshots are sent to Anthropic’s API to be read, under their commercial terms, which do not permit training on it. The site runs on Vercel and stores data in Neon, both in the course of serving the page. Nothing is sold, and there are no advertising or analytics trackers.

Registration checks

When you check a registration, that number is sent to the DVSA’s MOT History service, and — only if you press the write-off button — to One Auto API, which draws on the insurance industry’s register. Both receive the registration and nothing else about you. We keep neither the registration nor the result.

The write-off check costs us money per lookup, which is why it never runs on its own.

Vehicle listings

The prices come from public adverts, collected monthly. Those are sellers’ public listings rather than anything about you.

Getting in touch

Raise an issue on the repository. Since there are no accounts, there is no personal record for us to look up, export or delete — removing the extension ends its side of it entirely.

About the extension