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Holland Shier Authentication | HSA – Authenticate Collectibles & Autographs — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Collecting →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
allianceauthentic.com ↗	68 match 1 shared topics	The Ultimate Collectible by Alliance Authentic	en	collecting	robotsllmsaihumans	emailphone	partial · 8
heritagecertified.com ↗	67 match 1 shared topics	Heritage Certified – Authentication Services	en	collecting WordPress WooCommerce	robots llmsaihumans	emailphone	none
noicollectiblesusa.com ↗	66 match 1 shared topics	NOI Collectibles USA – The Magic of PANINI in USA	en	collecting WordPress	robotsllmsaihumans	emailphone	none
247collectiblesllc.com ↗	66 match 1 shared topics	24-7 Collectibles LLC	en	collecting Shopify	robots llmsaihumans	emailphone	none
specfictionshop.com ↗	66 match 1 shared topics	Speculative Fiction Collectibles	en	collecting Shopify	robotsllmsaihumans	email phone	none
spectrum-collectibles.com ↗	66 match 1 shared topics	Spectrum Collectibles Ltd.	en	collecting Shopify	robots llmsaihumans	emailphone	none
autographmagazine.com ↗	66 match 1 shared topics	Autograph Live - Authenticity is Everything	en	collecting	robotsllmsaihumans	emailphone	none
4bdncollectables.com ↗	66 match 1 shared topics	4BDN Collectibles	en	collecting Shopify	robots llmsaihumans	emailphone	none
4bdncollectibles.com ↗	66 match 1 shared topics	4BDN Collectibles	en	collecting Shopify	robots llmsaihumans	emailphone	none
cnjcollectibles.com ↗	66 match 1 shared topics	CNJ Collectibles	en	collecting Shopify	robots llmsaihumans	emailphone	none
csgregistry.com ↗	66 match 1 shared topics	Certified Collectibles Group	en	collecting	robotsllmsaihumans	emailphone	none
megadawgcollectibles.com ↗	65 match 1 shared topics	MegaDawg Collectibles	en	collecting	robotsllmsaihumans	emailphone	none
megaripscollectibles.com ↗	65 match 1 shared topics	Mega Rips Collectibles	en	collecting Shopify	robots llmsaihumans	emailphone	none
spawnpointcollectibles.com ↗	65 match 1 shared topics	Spawn Point Collectibles	en	collecting Shopify X-Cart	robots llmsaihumans	email phone	none
spawnpointltd.com ↗	65 match 1 shared topics	Spawn Point Collectibles	en	collecting Shopify X-Cart	robots llmsaihumans	email phone	none
m2militarycollectibles.com ↗	65 match 1 shared topics	M2 Military Collectibles	en	collecting	robotsllmsaihumans	emailphone	none
mcgcollectibles.com ↗	65 match 1 shared topics	McGcollectibles	en	collecting Shopify	robotsllmsaihumans	emailphone	none
cliftonhallcards.com ↗	65 match 1 shared topics	Clifton Hall: Cards and Collectibles	en	collecting Shopify	robots llmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.