Listings change. Rates disappear. Promotions expire. Mandates rotate. Stonys is a market intelligence platform that continuously tracks, verifies and analyses the global superyacht charter market, transforming fragmented listings into the longitudinal record that supports commercial decision-making. Access is by invitation or reviewed application.
One vessel, forty platforms, one canonical record.
Every advertised rate, every mandate, date stamped and kept. The market forgets; we do not.
Rate moves, mandate transitions, and asking-price drift, surfaced the moment they occur.
A structured database, not a stack of brochures.
Verified comparables for the vessel in front of you, benchmarked by what actually prices a yacht, not headline length. Know which published figure is live and which is a relic, before your client quotes it back to you. See the patterns that precede a reprice, so a mandate change never catches you mid-negotiation.
Your vessel’s position against her genuine peer group by mission, volume, and specification, with the evidence to justify a post-refit reprice or to hold a rate under pressure. Complete discretion is structural: owner identities and private terms are never published, for anyone, at any tier.
Fleet-wide benchmarking against verified market positions. Early signals on softening rates and unsold weeks. The context to advise an owner before the season is lost, and the record to show the advice was right.
Registry-bound identity, documented refit lineage, and longitudinal market context for vessels that rarely leave a paper trail. Dated, citable intelligence for decisions that outlive a season.
Every observation is verified at source and date stamped. Every published report passes hard validation before release. The full methodology is a membership privilege.
An index publishes only once its class reaches a minimum verified sample of eight vessels; readings are the median advertised weekly low-season rate across verified dossiers, each figure traced to its publishing source and dated. Indices are per rig and mission class because our own findings show these, not gross tonnage, are the axes on which this market prices. Classes below threshold are shown in build, with progress disclosed.
Twelve exhibits from recently published intelligence. Seven are rate histories with the observed driver identified: a change of mandate, a refit, a relaunch. Five are structural findings on what actually prices this market, computed across the verified corpus of 230+ rated vessels.
A 1999-built 76m whose advertised rate stepped from €645,000 to €725,000, a rise of 12.4%, around a documented change of central agent in mid-2025. Across the corpus this is a repeating pattern: a mandate transition reliably precedes a rate reset. Meanwhile a stale card roughly €100,000 under the live rate kept circulating. Both facts are dated observations in the archive.
A 95m flagship whose advertised rate rose from €1,100,000 to €1,150,000 across her 2025 refit, a reprice tracking the yard period, while two platforms continued carrying the pre-refit figure. A charterer quoting from the wrong card negotiates against a rate that no longer exists. Knowing which card is live is the entire game.
A 2024 launch that shed a third of its advertised weekly rate in two years. The signature of launch price discovery: a novel hull opening high and stepping down until the market answers. Every step exists in the archive as a dated observation, alongside a stale third-party card that overquoted her by €191,000 against the moved rate.
Three asking prices in four months, while a stale card elsewhere still shows the same hull roughly €7M above the real asking. One vessel, two simultaneous truths. We keep the canonical record.
An 85m flagship cut its asking by €7,500,000 in the same period it recorded 139 charter days: roughly €17.9M gross and a top industry charter award. Read together, the two series say something neither says alone: the asking drift is price discovery on the sale side, not weakness in the asset. One of the very few hard utilisation datapoints in the public domain, preserved next to the price history it reframes.
A relaunched expedition flagship seeding its booking record: maiden month priced to move, standard rate reached in three dated steps. Read correctly, an introductory ramp is occupancy intelligence, the scarcest datapoint in this industry, hiding in plain sight.
A 92-metre flagship whose advertised rate has not moved in nearly eight years, recovered from dated archives and held as a longitudinal series. Stability is a finding too, and it is one that only an archive can prove. Most of the market cannot tell you whether a rate is firm or merely forgotten. We can.
The one hundred most recently verified vessels with a live advertised rate, plotted together. Weekly rate scales with length to the power 2.67: doubling the hull multiplies the week roughly sixfold, and the fit explains eighty percent of the variance across hulls from 40 to 122 metres. What it does not explain is mission: explorer vessels price a mean of 13% below the curve at identical length, and sailing yachts follow a different logic entirely. Length sets the neighbourhood; mission and the currency of the paperwork set the price.
Across 250+ verified vessel dossiers, 91% exhibit at least one live pricing-integrity signal: a stale rate still in circulation, a figure on the wrong currency or season basis, conflicting specifications, or several live prices for the same week at sea. None of this is visible from any single listing. It only appears when the market is read whole and kept over time. This is the condition of the public record, quantified; it is also the reason this platform exists.
Advertised weekly rate against build year in the 97m+ class. Hulls delivered across 2002 to 2020 advertise €1.5M to €1.8M: a 2019 delivery prices level with a 2002 one; seventeen years of vintage are worth roughly zero. Hulls delivered 2024 to 2026 advertise €2.4M to €3.5M. The band between is empty. That shape rules causes out: it is not inflation (a flat line for seventeen years, then a discontinuity, is not what inflation looks like) and it is not a vintage premium (2019 = 2002). What remains is a regime: the market does not pay for newer. It pays for current.
Two near-identical sisters from one yard, advertised 157% apart, and the divergence is not the steel. One card is live; the other has not changed since September 2019. Dispersion often measures whether anyone is tending the card, not what the yacht is worth. Distinguishing the two is precisely the job.
Of the verified corpus, 230+ vessels carry two or more live published charter figures at once. For those vessels the figures sit a median €49,343 apart, with 75% exceeding the €10,000 materiality line. The causes are structural: currency handling, stale trails left by repricing, seasonal cards republished as single numbers, and figures copied between platforms at different dates. Sale asking prices are excluded; the comparison is published charter from-rates only. This is the noise every negotiation happens inside, and the spread that verification resolves to one controlling figure per vessel.
Vessel-level intelligence shown only from published Public Editions. Attributed drivers are dated, observable coincidences: a mandate change, a yard period, a card structure. They are never claims about any party’s intent. Owner identities, SPV structures, and achieved prices are never published. Broker houses and platforms are anonymised in public renders.
Calibrated and back tested on the verified corpus. Four candidate pricing axes were tested on controlled comparisons and rejected before this model was fitted: length, volume, volume-per-guest, and yard-and-vintage. It prices what survives.
Indicative reference only. Not a quotation.
Full model access is a membership privilege.
Stonys is a private intelligence network. Members are boutique brokerages, yacht management companies, multi-vessel operators, and owner representatives who contribute to and draw from a shared, neutral market memory, under invitation-only access and strict confidentiality. Membership is limited by region and segment to preserve signal integrity: the value of a neutral reference depends on no single participant controlling it. Applications are reviewed personally. We decline applications that would compromise the neutrality of the network.
We are not a booking platform, a listing marketplace, or a fleet management tool. We are the neutral intelligence infrastructure layer the industry has always needed.
We measure the market, never the people.
In public, we aggregate and anonymise.
Every output makes a participant better at their job.