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Proto9 alternatives & similar sites

Proto9 — 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 Chemistry →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
protegerdaily.com ↗	63 match 1 shared topics	Protéger — BRB	en	chemistry	robotsllmsaihumans	emailphone	none
protoxrd.com ↗	62 match 1 shared topics	Proto X-ray Diffraction Systems and Services	en	chemistry	robotsllmsaihumans	emailphone	none
skincaredeveloper.com ↗	62 match 1 shared topics	Duckworth – Prototyping & Product Development	en	chemistry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
protochemix.com ↗	62 match 1 shared topics	ProtoChemix \| Advanced Chemical Testing Laboratory	en	chemistry	robotsllmsaihumans	emailphone	none
protekthai.com ↗	62 match 1 shared topics	Protek Chemicals & Engineering	en	chemistry	robotsllmsaihumans	emailphone	none
protectotherm.com ↗	61 match 1 shared topics	Protectotherm \| Advanced Fire Retardant Paint Additive	United States~ en	chemistry	robots llmsaihumans	emailphone	none
protexcolorchem.com ↗	61 match 1 shared topics	PROTEX COLOR-CHEM – Dyes and Chemicals Marketing Company	en	chemistry WordPress	robotsllmsaihumans	emailphone	none
agma.co.uk ↗	61 match 1 shared topics	Bespoke Chemical Solutions \| AGMA \| Clean. Sanitise. Protect.	United Kingdom en	chemistry WordPress	robotsllmsaihumans	email phone	none
protexsourcingsg.com ↗	61 match 1 shared topics	PROTEX SOURCHINGSG-CHEM – Dyes and Chemicals Marketing Company	en	chemistry WordPress	robotsllmsaihumans	emailphone	none
cationic-surfactant.com ↗	61 match 1 shared topics	Cationic Surfactant Raw Material factory - Protein Surfactant manufacturer from China	en	chemistry	robotsllmsaihumans	emailphone	none
908devices.com ↗	60 match 1 shared topics	Chemical Analysis Devices \| 908 Devices	en	chemistry WordPress	robotsllmsaihumans	emailphone	none
acsmaterial.com ↗	60 match 1 shared topics	ACS Material - Advanced Chemicals Supplier	United States~ en	chemistry Magento	robots llmsaihumans	email phone	none
advansix.com ↗	60 match 1 shared topics	AdvanSix \| Good Chemistry.	en	chemistry WordPress	robotsllmsaihumans	emailphone	none
afirm-group.com ↗	60 match 1 shared topics	AFIRM Group	en	chemistry WordPress WooCommerce	robotsllmsaihumans	emailphone	none
ameteksi.com ↗	60 match 1 shared topics	AMETEK SI \| Electrochemistry \| Potentiostat \| Battery Analyser \| FRA	en	chemistry	robotsllmsaihumans	emailphone	none
atfinet.com ↗	60 match 1 shared topics	ATFI	en	chemistry Joomla	robotsllmsaihumans	emailphone	none
basechem.org ↗	60 match 1 shared topics	物竞化学品数据库-专业、全面的化学品基础数据库	en	chemistry	robotsllmsaihumans	emailphone	none
beautifulchemistry.net ↗	60 match 1 shared topics	Beautiful Chemistry	en	chemistry Squarespace Reaction Commerce	robotsllmsaihumans	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.