Three layers, each doing one job
Nothing is overwritten
Every value is collected and kept exactly as its source published it, tagged with where it came from. If a translation rule gets smarter later, it re-runs against this — nothing has to be re-collected.
One schema, applied deterministically
A reviewed mapping dictionary turns each source's own vocabulary into a shared set of keys — the same key, the same unit, regardless of which manufacturer it came from.
The same part, tied together
GTINs, ETIM/eClass codes, and distributor SKUs cross-reference so the same physical product collected from different places resolves to one record, not duplicates.
What each number on this site counts
Every figure is a live count from the database. Behind each headline is a precise definition — and a few parts that are smaller than the headline. All of it is listed here.
| Figure | What it counts | Behind the number |
|---|---|---|
| Products indexed | Every product record in the database, including discontinued parts. | 74% already carry normalized spec facts. The rest are indexed — identity, links, documents — with their specs still to be collected. |
| Verified spec facts | Every normalized spec fact: one value for one spec of one product, under stated conditions. | Each fact is labeled with a source type and a verification status (both lists below). 75% are verified; the rest are labeled unverified — not yet confirmed, not known to be wrong. |
| Documents archived | Datasheet, guide and image links indexed against products. | Links to the files themselves, mostly manufacturer-hosted; local copies are kept for a small subset. By type: operating guides 991K · installation guides 512K · datasheets 470K · design guides 354K · programming guides 245K · product images 526K · catalogs 419. |
| Core manufacturers | Manufacturers with at least 1,000 products in the database. | 216 manufacturer brands are tracked in all — each one is listed on Coverage. Depth is built brand by brand as it's needed. |
| Manufacturer-verified | Products whose data was collected from a manufacturer source: its own website, catalog or API. | About where the data came from — separate from the fact-level checks and from what a product's link opens (both below). The other 6% came through distributor catalogs and are labeled that way. |
| Product categories | Categories with at least one product assigned. | Coverage varies by category; newer ones are still filling in. |
Headline figures are measured from the live database and rounded down — “+” means at least. Shares are rounded to the nearest percent, so a list may not sum to exactly 100%.
What "manufacturer-verified" actually means
It describes where a product's data came from. A product counts as manufacturer-verified when its record was collected from a manufacturer source: the manufacturer's own website, catalog or API. A distributor catalog is a fine way to discover that a part exists — but a distributor listing never makes a product manufacturer-verified.
94% of the database meets that bar today. The other 6% were collected through distributor catalogs; they're shown, not hidden, and labeled as distributor-sourced until they're collected directly from the manufacturer.
That is a statement about data origin only. It does not say the link we show opens that exact part's page, and it does not say each fact has been checked — the lists below cover those.
source_key (the raw label)
provenance_tier (what kind of statement)
verification_status (checked or not, and how)
verified_against (the page, when confirmed)
confidence score
What a product's link points at
Each product carries a link back to the manufacturer, plus a label for what kind of page that link is. The label is declared per source and returned with the link.
| Link type | Products | Share | What it opens |
|---|---|---|---|
| Product page | 905K | 97% | The part's own page on the manufacturer's site. |
| Search link | 4K | 0.4% | The manufacturer site's search for this part number. |
| Family page | 17K | 2% | One page covering a whole product family or range. |
| Document, or not yet classified | 10K | 1% | A PDF, or a source whose link type hasn't been classified yet. |
A label says what kind of page a link is — not that someone has opened every one.
What "verified spec facts" actually means
Every fact carries two separate labels: what kind of statement it is, and whether it has been checked. They're kept apart on purpose — a distributor's statement can be verified, and a manufacturer's statement can still be unverified.
Where each fact comes from
| Source type | Facts | Share | What it means |
|---|---|---|---|
| Stated by the manufacturer | 5.59M | 74% | The value appears in the manufacturer's own site, catalog or API for that product. |
| Parsed from a manufacturer description | 49K | 1% | Extracted from the manufacturer's own free-text description by a reviewed rule. |
| Decoded from the model number | 454K | 6% | Derived from the manufacturer's type-code scheme; labeled as derived. |
| Copied from the product family | 727K | 10% | Carried over from a representative product of the same family; labeled as such. |
| Stated by a distributor | 434K | 6% | Taken from a distributor's listing; labeled as distributor-sourced. |
| Source not yet determined | 340K | 4% | Comes from a record that mixes manufacturer and distributor text, where we can't yet tell who said it. |
Whether it has been checked
| Status | Facts | Share | What it means |
|---|---|---|---|
| Confirmed against the manufacturer's page | 5.59M | 74% | The page we recorded states this value; its URL is kept with the fact. |
| Confirmed against a manufacturer document | 75K | 1% | A manufacturer's own catalog or datasheet states this value; its URL is kept with the fact. |
| Confirmed by a second source | 64K | 1% | An independent source gives the same value for the same spec under the same conditions. |
| Unverified | 1.87M | 25% | Collected and labeled, but not yet confirmed by either check. |
The 7.5M+ headline counts every normalized fact. 5.7M+ of them (75%) are verified, and each fact says which kind it is. A check can confirm a value but cannot prove one wrong, so “unverified” means not yet confirmed — not known to be wrong.
The LLM designs the rule once. It doesn't guess the answer each time.
The distinction matters more than it sounds like it should.
- What we don't do: ask a model to read a spec sheet and guess the current rating every time a product is imported. That's expensive, unreproducible, and a wrong answer is silent.
- What we do instead: for each new source, use LLM assistance once to draft a translation rule — "this label, in this source, means this canonical key, parsed this way." A person reviews that rule.
- Then it's deterministic: a plain parser applies the reviewed rule to every product from that source. Same input, same output, every time — and it's auditable, because the rule is a readable file, not a model's internal weights.
Change is a diff, not a surprise
Every import is versioned rather than overwritten in place. When a rating changes or a part is discontinued, it shows up as an old value, a new value, a manufacturer link, and two timestamps — a claim you can independently verify, not a notification you have to take on faith.
Ready to see it in action?
For developers, distributors, or manufacturers.