See what a boat is really worth.
Buying a boat is one of the biggest purchases most people ever make, in a market with almost no price transparency. Seaworth searches every European marketplace at once, folds duplicate listings into one boat, and puts a Seastimate on each — an independent estimate of what it is worth.
01Where the data comes from
Every boat, once.
We collect the boats publicly advertised on the major European marketplaces — Boat24, BandOfBoats, Yachtall, Yachtworld, ApolloDuck, Scanboat, TheYachtMarket, CosasDeBarcos, FINN, Blocket, DBA — and refresh them every night.
The same boat is often advertised in several places at once, at different prices, sometimes months apart under a new listing. We match those together into a single boat, so you see its whole market history — every cut and every relisting — rather than one seller's slice of it.
We are an insight layer, not a marketplace: we host no listings, sell no boats, and every boat links back to the original advert.
Boat24
€92 000
Yachtworld
€89 500
Yachtall
€92 000
BandOfBoats
€84 500
Jeanneau Sun Odyssey 419 · 2017
1 boat · 4 listings
listed €92 0002 cutsnow €84 500
02The Seastimate™
Two numbers. The gap is what you negotiate over.
Every boat has an asking price — the number the seller chose. Its Seastimate is the number the market implies. Drag the seller's number and watch the verdict change; the market's doesn't move.
It comes from a model trained on the live European market — tens of thousands of real listings, with their specifications and asking prices. It learns how the market actually prices length, age, builder, engine, condition, equipment and location, from the market itself rather than a depreciation rule of thumb, and it is retrained every night so its sense of prices moves as the market does.
Asking
€84 500
Seastimate™
€96 000
Fair price€11 500 (12 %) under the estimate
likely range · where the price lands 8 times in 10
- The Seastimate
- One figure: what a boat with these specifications, in this condition, in this place, is worth on today's market.
- The range
- Boats are not commodities, and one number would be a false promise. A narrow range means the model has seen many boats like this one and is confident; a wide one means it hasn't, and you should treat the figure with more caution.
- The deal badge
- Simply the asking price measured against the Seastimate. It says nothing about whether the boat is good — only whether the price is typical for what is being offered.
- Why this price
- The Seastimate broken down into the things that actually moved it — the year it was built, where it is lying, how it is rigged — so you can judge the reasoning rather than trust a number.
03Search by water
Search the way sailors think.
Not by postcode — by water. Find boats within a real sailing distance of your home port, computed over actual navigable routes, not a circle on a map.
Two boats the same distance from you as the crow flies can be a morning's sail apart, or a day's. The range follows the water — out through the channels, around the headlands, between the islands — so a boat inside it is one you could actually sail home.
Choose your home port and how far you are willing to go, from a 25 nm hop to a 2,000 nm passage. The range is drawn on the map, and the results show only the boats inside it.
04Being blunt
What we cannot know.
Everything above is built on advertised listings. That is a real constraint, and it is worth being blunt about what follows from it.
Where a listing is not a normal sale at a fixed price — an auction lot, a fractional share, a test listing — we withhold the valuation rather than publish one we cannot stand behind.
- 01
We see asking prices, not sale prices. What a boat was advertised at is public; what it finally changed hands for, after the survey and the haggling, generally is not. Our estimates therefore describe what boats are asked for — expect the agreed price to land below it.
- 02
A boat leaving the market is not proof that it sold. When a listing disappears we can say it was delisted at its last asking price, after so many days on the market. We never claim it sold at that price, because we do not know that.
- 03
Specifications come from the seller. If a listing says the wrong year or the wrong engine hours, our valuation of it inherits that mistake.
- 04
A model cannot see condition. It has never smelled the bilge, run the engine, or found the soft patch of deck. Two boats with identical specifications can be worth wildly different amounts, and the difference is exactly what a survey is for.
- 05
Rare boats are valued less confidently. If the market holds very few boats like the one you are looking at, the model has less to learn from — which is what the widening confidence range is telling you.
A Seaworth valuation is a well-informed starting point for a negotiation. It is not a survey and not an appraisal, and it should never be the only thing you rely on when you commit money to a boat. Get a professional survey.
05Who pays us
You do, or nobody does.
Sellers, brokers and marketplaces cannot pay to appear on Seaworth, to rank higher on it, or to change what a valuation says about their boat. We take no commission on any sale.
Our free tier is funded by the buyers who upgrade, and our incentive is to be right about prices rather than flattering about them — the moment a valuation bends toward whoever is paying, the product is worthless.
If a valuation looks wrong to you, we want to know — send the boat and your reasoning to support@seaworthboats.com. People who know a class of boat well spot things a model cannot, and that feedback goes back into how we build it.
Your next boat is already listed.
Every boat on the European market, once, with an independent valuation on each.
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