Research / Methods / Market data
The link market,
measured in the open.
The link market, measured and published in full. Every figure is computed from the live catalogue, carries the size of the sample behind it, and links to the method that produced it. No supplier and no domain is ever named.
methodology version 2026-09-05
Market report
What the whole catalogue costs: median price by subject and placement type, the spread between sellers of the same domain, and how much of that authority is fake.
Explore the market report ↗02 / the rulesMethodology
The five rules every published number follows and the versioned methods below that produced them. Each figure on the site links back to its method here.
Read the methodology ↗The research library
Follow the evidence.
One home for each method. No supplier or publisher identities are disclosed.
Data sources
Where every number comes from: the marketplaces, the backlink index, the web graph, our own orders.
Quality methodology
The five tests behind “suspect”, what they catch, what they miss, and the Placement Score built on them.
Pricing methodology
How prices are normalised, what “price gap” and “market reference” mean, and what they do not.
The web graph
The open web graph: saturation, leader links, probable buyers, and its limits.
Backlink Price Index
A monthly, immutable, fixed-basket index of what link placements cost, with CSV.
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