How we compute · Last reviewed 2026-09-14

TrothStone vs cinch

The difference in one line

cinch is an online used-car retailer: it buys stock, reconditions it, and sells it to you with delivery and a return window. TrothStone owns no stock and sells nothing — it is a scoring layer over the entire market, cinch included. cinch is the right answer when you want to buy today with retail protections. TrothStone is the right answer when you want to know whether any car — cinch's or a private seller's — is priced fairly before you commit.

cinch is an owned-inventory retailer. TrothStone is a neutral analysis layer over every seller, including retailers like cinch.

At a glance

	TrothStone	cinch
What it is	A research surface with no inventory — we score the market, we do not sell in it.	An online used-car retailer selling its own stock.
How it makes money	Nothing today. No margin exists — there is no stock and no checkout.	Retail margin on vehicles sold (plus finance products at checkout).
Market coverage	The whole live market: 417,146 listings across 78 makes from multiple sources, 577 lease deals.	cinch's own inventory — thousands of cars, curated.
Price view	Asking vs modelled fair price for every listing in the corpus — including whether a cinch-advertised car is above or below the market for its spec.	cinch's own asking prices.
Consumer protections	None, by design: TrothStone is informational. You buy elsewhere, with whatever protections that seller offers.	Real ones: return window, warranty, delivery. We say plainly — this is where cinch is stronger.
Accuracy you can check	Published: holdout RMSLE 0.161, MAE ~£1,770; backtest error by cohort on the methodology page.	No published pricing-model error.

cinch made buying a used car feel like buying anything else online — stock, price, delivery, return window. TrothStone is not a retailer and does not want to be one. It scores the entire used market, including cinch's own stock, for true cost of ownership. This page sets out where each is the better tool.

A useful way to frame the difference is the question each product answers. cinch answers "what can I buy today, online, with a return window?". TrothStone answers "is any specific car I am considering — cinch's or anyone else's — actually a good deal for what the market charges?". The questions sit on either side of a buying decision rather than competing for the same click.

cinch's product strengths are real and worth naming plainly: 14-day return window on most stock, delivery to your door, a warranty included on the cars they retail. If those protections matter to you, and you have decided which car you want, cinch is a credible answer. TrothStone does not offer any of those things — and does not pretend to. The trade-off is that buying through a retailer includes a retail margin in the price, plus finance margin on the PCP quote, plus the cost of the return-window insurance. That margin is the price of the protections. Whether the protections are worth the margin is your call; TrothStone's role is to make sure the price you are paying is fair for the spec, not to take the margin out.

The independence posture is where the two products diverge most visibly. cinch sells its own stock; it cannot be neutral about whether a cinch-advertised car is a good deal. TrothStone does not sell any stock and pays no dealer for placement — that is the only way to publish a fair-price model that treats every seller the same. Every listing in the scored corpus carries an outbound link to the source advert so the buyer can take the score straight to the seller, whatever that seller is. The product is the analysis, and the analysis does not depend on a particular retailer winning the sale.

What this page is NOT

Not advice. Figures are model estimates for information only — not financial advice. Representative rates, not offers.
Not a comparison of every dimension. This page describes the structural difference between the two products, in plain English, with links to both sides.
Not UK-general. TrothStone scores the UK market only; cinch may cover more.
Not a sales pitch. TrothStone has no checkout, no lead forms, no paid placement. cinch's own site is the right place to evaluate their product.

Questions people ask

Is TrothStone better than cinch?

Different jobs. If you want to buy a car today, online, with a return window and warranty, cinch is a retailer that provides those things. TrothStone is not a retailer — it is the free research step that tells you whether the car you are about to buy, from cinch or anyone else, is priced fairly for its spec, mileage and age.

Does TrothStone include cinch cars?

Yes — cinch is one of the capture sources in the scored corpus (417,146 listings overall). Every listing row carries an outbound link to the original advert, so a score here takes you to the seller there. We display derived statistics and minimal factual fields only.

Can I buy a car on TrothStone?

No, deliberately. TrothStone is a research surface, not a transactional one. There is no basket, no checkout, no lead form. The site makes money from nothing, which is what keeps the analysis neutral.

See the difference on live data

Every claim above reduces to one habit: before you buy any car, check what the market says it is worth and what it costs per month to own. Browse 417,146 scored listings, or read how the numbers are computed.