Licence

$20, once, per site. This page is the customer-facing summary: what you get, what you do not, and exactly what the fingerprint in the model file is.

What you get

model-tr-<version>.bin — fingerprinted to you
The search engine (WebAssembly), the CLI and the JS client
Every update for 12 months from purchase
One production domain, plus staging and local development — perpetual

When the 12 months end, the version you have keeps working forever. If you want to keep receiving updates, renewal is $10/year; if you don't, nothing breaks — you simply stop downloading new releases.

What you do not get

Redistributing the model as a standalone artifact, or inside an SDK or product intended for others to embed
Training a competing model on its outputs
Multiple unrelated production domains under one licence

An agency shipping many client sites needs one licence per site, or an agency licence covering several — email us for that.

The fingerprint: what it is and what it is not

Every model file carries a customer-specific orthogonal rotation folded into its output projection. Because the rotation is orthogonal:

cos(Ra, Rb) = (Ra)ᵀ(Rb) = aᵀRᵀRb = aᵀb = cos(a, b)

Similarity is preserved exactly. Ranking, recall, and every metric you could measure are unchanged; only the raw coordinates differ. Query and corpus pass through the same model, so an index built with a fingerprinted copy is self-consistent. In other words, the fingerprint costs you nothing in quality.

What it is for: if a copy of your model turns up somewhere it should not be, we can tell which licence it came from.

There are no runtime checks. Nothing phones home, nothing is domain-locked, there is no telemetry and nothing expires. The fingerprint exists so a leaked copy can be attributed — not to restrict you. It runs forever on a machine with no internet connection.

Versioning

Model change	Your index
patch (1.2.0 → 1.2.1)	stays valid
minor (1.2.0 → 1.3.0)	stays valid
major (1.2.0 → 2.0.0)	must be rebuilt

A major version moves the embedding space; the client detects this and refuses to search, telling you to re-index, rather than quietly returning wrong results.

Training data

The model that is sold was trained only on sources with a declared, permissive licence: HPLT (CC0), Wikipedia (CC BY-SA) and FineWeb-2 (ODC-By). No model trained on a source with an undeclared licence is offered for sale — a rule that disqualified our own earlier model.

Refunds

14 days, no questions. Email [email protected]; we do not ask why. The demo on the site is the real product, so most people have already made up their mind before buying.