The Marketplace Decision Is Really a Catalog Decision

Every distributor board deck on marketplaces eventually lands on the same three boxes: build one, join one, or sit this out. That framing is a distraction. The real question underneath all three options is whether your catalog can produce a complete, machine-readable product record — because whoever can, wins the customer relationship regardless of which box gets checked, and our own measurement of the industry says most distributors currently can't.

The costume

Marketplace strategy gets discussed like a business-model choice: take rate versus owned margin, platform risk versus platform reach, build cost versus time-to-market. Those are real tradeoffs. But underneath every one sits a data question asked far less often: can this company produce, for every SKU it wants to sell, a record complete enough that a matching engine — or an AI shopping agent, increasingly doing the same job — can find it, understand it, and trust it's the same part a rival is also listing?

That capability doesn't change based on whether the marketplace is yours or someone else's. A distributor that can't produce clean identifiers and attributes on its own product pages won't magically produce them in a third-party feed. The catalog is the constraint; the marketplace is just where it becomes visible to a buyer with other options.

Distribution Strategy Group has argued that a marketplace business case should weigh commission economics, incremental volume, and channel conflict against the cost of the platform build. All fair inputs. None of them asks the prior question: does the catalog behind the business case actually exist yet in a form a marketplace can ingest.

What our own numbers say

We didn't have to speculate about this. Anglera runs the Digital Readiness Index, a measured scorecard across four pillars — product data depth, buyer answerability, commerce transparency, and machine and agent readiness — sampled from live product pages at more than 30 of the largest North American distributors as part of the Top Distributors 2026 index.

The catalog pillar is where the industry is weakest, and the gap isn't subtle. Only 13 of 32 fully-measured distributors attach a GTIN or comparable identifier to any product in their sample. The median product page carries 11 structured attributes — a figure that hides an enormous range, from Grainger and Watsco posting medians near 47 down to Ferguson, whose five sampled pages returned a median of zero despite Ferguson scoring near the top of the group on buyer answerability. Those pages read well to a person: photos, specs, reviews. They return almost nothing a filter, a marketplace ingestion job, or an AI agent can parse as structured data.

That's the tell. A syndication-grade record isn't "a page that looks good." It's a page a machine can consume without a human translating it first. Most of the distributors we measured — including some of the largest, best-capitalized ones in the country — don't clear that bar on their own primary channel. Joining a marketplace doesn't fix that gap; it just moves the gap somewhere a competitor's clean record can outrank you for the exact same part.

Third-party onboarding is a data-ops problem wearing a platform-feature costume

The build-your-own-marketplace case has the identical problem, just relocated to onboarding. Distribution Strategy Group's "3 Rules" piece lists catalog and content governance as one of three success factors, alongside curation and merchant experience. We'd put it more bluntly: it isn't one of three co-equal factors, it's the gate the other two sit behind. A marketplace with poor merchant experience but a clean, governed catalog is annoying to sell on. A marketplace with a slick merchant experience and no catalog governance is unusable — buyers can't compare, can't filter, can't trust that two listings are the same part.

Mirakl, which runs syndication infrastructure for a large share of the B2B and B2C marketplace market, put a number on this in its 2026 seller report: sellers using its AI-assisted catalog transformation tool generate 88% more GMV than sellers who don't, and even inside that mature, purpose-built ecosystem, median onboarding still takes 28 days — the fastest sellers clear it in under two weeks, which means most don't. Distributors standing up an owned marketplace and asking third-party sellers to self-serve a catalog upload without comparable infrastructure should expect onboarding measured in months, not weeks, and a long tail who never finish. The stall point in nearly every owned-marketplace build we've seen described isn't the storefront, the checkout, or the seller agreements. It's the queue of incomplete product records nobody has staffed to fix.

That's not a platform gap you close by buying better marketplace software. It's a data-operations capability: someone has to own getting supplier and seller data into a consistent, machine-readable state, continuously, as the catalog grows. Most distributors have never built that muscle because a rep-driven sales model tolerates a messy catalog in a way a self-service marketplace cannot.

Listing on someone else's marketplace doesn't skip the requirement

The "just list on Amazon Business or a vertical marketplace" option looks like it avoids the catalog problem, since someone else owns the platform. It doesn't. Amazon Business alone now runs more than $35 billion in annualized GMV across 8 million business customers — real volume, but volume a matching engine allocates to whichever listing has the cleaner record for that part number. Bad product data isn't cosmetic on a shared marketplace; research cited by Inriver found 66% of shoppers have abandoned a purchase over missing or inaccurate product information, and 40% have returned a product because the data was wrong. A distributor that lists a part with a thin record isn't neutral there — it's donating that sale to whichever seller, private-label or competitor, filled the record out properly.

Distribution Strategy Group's most recent piece on marketplaces frames the format as still under-built relative to its ultimate size, with specialized vertical platforms as the likely winners over horizontal ones. We don't disagree with the trajectory. But "under-built" cuts both ways — it also means the catalog advantage available to whoever shows up with a complete record right now is larger than it will be once the format matures and every seller has caught up.

The move that actually matters

None of this argues for or against building, joining, or abstaining — that's a genuine business-model call, and reasonable operators will land differently on it. What it argues against is treating the catalog as a downstream detail of whichever choice gets made. Fix the catalog first, and all three paths get cheaper: an owned marketplace onboards sellers faster, a listing on someone else's platform actually wins the buy box, and staying out becomes a deliberate choice instead of a default born of not being ready anywhere.

This is squarely Anglera's lane. Your PIM stores the record; Anglera does the work of getting every SKU to a syndication-grade state — identifiers attached, attributes complete, consistent across the whole catalog rather than just the featured items — usually inside 30 days from a flat file, no rip-and-replace required. The marketplace decision can wait a quarter. The catalog gap can't, because every quarter it stays open is share someone with a cleaner record is already taking.