VesselTwin keeps one private, searchable record for the boat you actually own: specs, documents, service, parts, photos, and the upgrades that make it yours.
Free for individual owners during early access · Upload your first manual in under a minute
The problem
Every repower, electronics refit, canvas swap, and plumbing fix takes your vessel a step further from the original datasheet. Five years in, the manual in the glove box barely describes the boat underneath you.
Most owners cope with binders, camera rolls, and half-remembered receipts. When you sell, survey, or break down far from home, that history either saves you — or it costs you.
What it does
Built for the parts of ownership no factory brochure covers — the rewiring, the replacements, the upgrades that make the boat yours.
Log every repower, rewire, refit, and replacement. Link parts, photos, costs, and the why — so future-you (or the next owner) isn’t guessing.
Take a photo, drop a measurement on the spot — thru-hull diameter, hatch opening, cushion cutout. The number lives on the image, not a crumpled receipt.
Manuals, surveys, invoices, warranty cards — all scanned, searchable, with AI pulling out dates, vendors, part numbers, and costs automatically.
Serial numbers, impeller sizes, belt specs, compatible alternatives. Next time something fails, you’re not squinting at a greasy label with a flashlight.
Canonical storage in metric, display in whatever you think in. Overwrite the factory number when you swap fuel tanks — the twin stays accurate.
Photos organized by where on the boat they are — engine room, lazarette, helm — not by upload date. Find the shot from three seasons ago.
Tech-forward setup
Upload the PDF that came with your boat — or a photo of the spec sheet on the engine cowling. Our AI will try to pull out make, model, engine, dimensions, capacities, electrical, and fuel — and pre-fill the form so you can review, fix anything off, and start logging the interesting parts: the things that have changed since.
The other half
Somewhere out there, another owner already solved the problem you’re about to Google at 10pm. VesselTwin is built so that knowledge travels with the hull, not the owner.
A growing catalog of makes, models, and variants contributed by owners. Search it when you add a boat — and help fill it in when yours isn’t there yet.
One page per make/model/year-range, with public specs, approved photos, community guides, known issues, service intervals, compatible parts, and vendor reviews.
Owner-authored walkthroughs with ordered steps, photos, videos, parts, tools, costs, difficulty, fitment notes, and lessons learned.
Auto-aggregated from maintenance entries: “8 of 24 owners of this model reported seacock leaks around year 5.” Catch problems before they catch you.
Routine service logs shared anonymously can roll up into model-level intervals, so owners see what similar boats actually do between services.
Which rigger do Tartan 34 owners actually use? Model-scoped shop and tech reviews — far more useful than a generic review site.
Every time someone logs a part with a serial, the graph grows: “this impeller fits 6 Yanmar models.” Find alternatives without guessing.
Follow a public model page and get in-app alerts when owners publish new guides or vendor reviews for that hull family.
Threaded replies on public guides let owners ask fitment questions, add clarifications, and share what they did differently.
Turn follows into periodic email or push recaps when owners share new guides, issues, tips, or trusted shops for your model.
See a modification stack you love on another hull? Copy it as a wishlist for yours — with the parts list, estimated cost, and difficulty already in place.
Opt-in, region-level map of vessels by model for meetups, second-opinions, or pre-purchase walkthroughs. Location is fuzzed — no doxxing your slip.
Aggregated: “electronics refit on 35–45 ft sailboats typically runs $8k–$14k.” Real owner-reported totals, not a shop’s wishful estimate.
The first structured community signals are live: model pages can show owner-shared guides, known issues, maintenance intervals, compatible parts, and vendor reviews. The roadmap now pushes those signals into richer trends, cost ranges, and project planning as more owner data lands.
Your boat is private by default. The Hull Identification Number (HIN), registration, and marina location are stripped from anything you share. Contribute anonymously to the model catalog, share service requests with a specific mechanic, or go fully public — all from the same record.
You’ve made the boat yours over years. VesselTwin remembers what you’ve forgotten.
Multiple hulls, multiple crews, one consistent record for each vessel and every hand-off.
Owners share the exact vessel record with you before you’re even at the dock. Less guesswork, fewer callbacks.
A full modification history at closing — more than a stack of receipts and a hopeful seller.
Free for individual owners. Add your first boat, upload a manual, and log what your hull has really become.
VesselTwin is in early access — features, availability, and pricing may change as we learn from early owners.