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Opsecart alternatives & similar sites

OpSec Art — 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 Information And Network Security →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
siem.at ↗	64 match 1 shared topics	XSEC - Start	Austria de	information-and-network-security	robotsllmsaihumans	emailphone	none
cyberdeutsch.news ↗	64 match 1 shared topics	CyberDeutsch Nachrichten — Aktuelle Cybersicherheit-Nachrichten auf Deutsch	de	information-and-network-security	robotsllmsaihumans	emailphone	none
nifis.de ↗	64 match 1 shared topics	News: NIFIS - Nationale Initiative für Informations- und Internet-Sicherheit	Germany de	information-and-network-security TYPO3	robotsllmsaihumans	emailphone	none
cybersicherheit.at ↗	64 match 1 shared topics	Schutz - Cybersicherheit \| Cybersecurity \| Firewall	Austria de	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
anomal.ch ↗	63 match 1 shared topics	Schweizer Cyber Security Experten: Schützen Sie Ihr Unternehmen \| ANOMAL	Switzerland de	information-and-network-security	robotsllmsaihumans	emailphone	none
cybernewshub.tech ↗	63 match 1 shared topics	CyberNewsHub - IT-Sicherheit, Linux und Technik	de	information-and-network-security WordPress WooCommerce	robots llmsaihumans	emailphone	none
u-s-p.com ↗	63 match 1 shared topics	Umfassender Schweizer Cyber Security Service	de	information-and-network-security WordPress	robots llmsaihumans	email phone	none
it-securitygroup.eu ↗	63 match 1 shared topics	IT-Security Group - Ihr kompetenter Partner für Datensicherheit und Serviceleistungen	European Union de	information-and-network-security	robotsllmsaihumans	emailphone	none
bitdefender.com ↗	63 match 1 shared topics	Bitdefender - Weltspitze in Cybersicherheit	de	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
cyber-security.versicherung ↗	63 match 1 shared topics	IT-Sicherheit - Mivisio - Cyber Security und Versicherungen	de	information-and-network-security WordPress	robotsllmsaihumans	email phone	none
nfosec.de ↗	63 match 1 shared topics	Start — nfosec GmbH	Germany de	information-and-network-security	robotsllmsaihumans	emailphone	none
cyberconference.schwarz ↗	63 match 1 shared topics	Startseite \| Cyber Security Conference 2026 by Schwarz Digits	de	information-and-network-security	robotsllmsaihumans	emailphone	none
nor-d.de ↗	63 match 1 shared topics	The official IPsec Howto for Linux	Germany de	information-and-network-security	robotsllmsaihumans	emailphone	none
syss.de ↗	63 match 1 shared topics	SySS – Ihre Experten für IT Sicherheit	Germany de	information-and-network-security TYPO3	robotsllmsaihumans	email phone	none
1ssa.org ↗	63 match 1 shared topics	1SSA, LLC - Ingenieur Büro Siepmann	de	information-and-network-security	robotsllmsaihumans	emailphone	none
thepentestexperts.at ↗	63 match 1 shared topics	SySS – Ihre Experten für IT Sicherheit	Austria de	information-and-network-security TYPO3	robotsllmsaihumans	email phone	none
cyfidelity.ai ↗	63 match 1 shared topics	Cyfidelity	de	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
nesec.de ↗	63 match 1 shared topics	NESEC ist Ihr Spezialist für Informationssicherheit - NESEC GmbH	Germany de	information-and-network-security TYPO3	robotsllmsaihumans	emailphone	full · 20

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.