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Protplex alternatives & similar sites

Protplex — Search the PDB by Biological Intent — 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 Artificial Intelligence →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
123labs.io ↗	67 match 1 shared topics	123 Labs — Research Terminal	en	artificial-intelligence	robotsllmsaihumans	emailphone	partial · 8
assetlens.dev ↗	67 match 1 shared topics	AssetLens — Search every asset you own	en	artificial-intelligence	robotsllmsaihumans	emailphone	partial · 8
human-perception-thesis.com ↗	67 match 1 shared topics	Can you tell real from AI? — Research Thesis	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
astar.dev ↗	66 match 1 shared topics	astar.dev — AI for the physical world	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
internationaldataflows.com ↗	66 match 1 shared topics	Cortex — Governed AI Operational Infrastructure	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
newsdesk.dev ↗	66 match 1 shared topics	Ergen — Research infrastructure for analysts	en	artificial-intelligence	robots llmsaihumans	emailphone	none
hostingspot.org ↗	66 match 1 shared topics	AIMEM — AI Research Intelligence	en	artificial-intelligence	robotsllmsaihumans	emailphone	partial · 8
nchant.ai ↗	66 match 1 shared topics	nCHANT — Biosignal Intelligence	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
noetherresearch.org ↗	66 match 1 shared topics	Noether Research	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
nodusio.org ↗	66 match 1 shared topics	NodusIO — The Physical Interface Standard for AI Agents	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
conductor.com ↗	66 match 1 shared topics	Conductor — Win in AI Search	United States~ en	artificial-intelligence Sanity	robots llmsaihumans	emailphone	none
huntprotocol.org ↗	66 match 1 shared topics	HuntProtocol — Open Talent Search	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
iotea.ai ↗	65 match 1 shared topics	42hz.ai — The AI O&M Platform for Critical Infrastructure	en	artificial-intelligence	robots llmsaihumans	emailphone	none
proustme.com ↗	65 match 1 shared topics	ProustMe — The Internet of Us	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
nofreelabor.com ↗	65 match 1 shared topics	No Free Labor — Research Before You Build	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
humanintelligencemodels.com ↗	65 match 1 shared topics	Human Intelligence Models — The Original Intelligence	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
intentgine.dev ↗	65 match 1 shared topics	Intentgine — Cached Intent-as-a-Service	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
humanovo.net ↗	65 match 1 shared topics	humanovo — research intelligence for scientists	en	artificial-intelligence	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.