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Open V3 alternatives & similar sites

Big Data for Cyber Defense | ONYPHE — 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
blackshieldcyber.org ↗	71 match 1 shared topics	BlackShield Cyber Defense	en	information-and-network-security	robotsllmsaihumans	emailphone	none
onfirewall.com ↗	71 match 1 shared topics	OneFirewall Alliance \| Cyber Defense \| CTI to Stop Attacks	United Kingdom~ en	information-and-network-security	robots llmsaihumans	emailphone	none
360cyberdefence.com ↗	70 match 1 shared topics	360 Cyber Defence	en	information-and-network-security	robotsllmsaihumans	emailphone	none
360def.com ↗	70 match 1 shared topics	Cyber Defense Consultancy - 360 Def	en	information-and-network-security	robotsllmsaihumans	emailphone	none
cybergatedefense.eu ↗	69 match 1 shared topics	Home » CyberGate Defense	European Union en	information-and-network-security WordPress	robotsllmsaihumans	email phone	none
blackfortress.tech ↗	69 match 1 shared topics	Black Fortress — Autonomous Cyber Defense Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
2ncyberdefense.com ↗	69 match 1 shared topics	2N Cyber Defense – Security services	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
blackmail.ai ↗	68 match 1 shared topics	blackmail.ai: AI Cyber Extortion Defense \| Blackmail.ai	en	information-and-network-security	robotsllmsaihumans	emailphone	none
focalpoint-sprl.be ↗	68 match 1 shared topics	Focal Point – Cyber Defence	Belgium en	information-and-network-security WordPress	robotsllmsaihumans	email phone	none
luyetcompanies.com ↗	68 match 1 shared topics	LuyetCompanies \| Mission-Ready Managed IT & Cyber Defense	United States~ en	information-and-network-security	robotsllmsaihumans	email phone	none
blackdice.ai ↗	68 match 1 shared topics	BlackDice \| AI-Powered Cyber Defence	en	information-and-network-security	robotsllmsaihumans	emailphone	none
360defense.io ↗	67 match 1 shared topics	360 Defense \| Comprehensive Cybersecurity Platform	en	information-and-network-security	robotsllmsaihumans	emailphone	none
appdefensealliance.dev ↗	67 match 1 shared topics	App Defense Alliance	en	information-and-network-security	robotsllmsaihumans	emailphone	none
mechatronx.net ↗	67 match 1 shared topics	Active Detection & Response - Xband Enterprises, Inc. \| Active Cyber Defense	en	information-and-network-security	robotsllmsaihumans	emailphone	none
1st-trust.org ↗	67 match 1 shared topics	Active Detection & Response - Xband Enterprises, Inc. \| Active Cyber Defense	en	information-and-network-security	robotsllmsaihumans	emailphone	none
1defender.com ↗	67 match 1 shared topics	1Defender - Unified cybersecurity for total defense	en	information-and-network-security	robotsllmsaihumans	emailphone	none
coredefenses.com ↗	66 match 1 shared topics	Core Defenses LLC	en	information-and-network-security	robotsllmsaihumans	emailphone	none
abhinavverma.codes ↗	66 match 1 shared topics	Abhinav Verma - Cybersecurity Engineer & Digital Defense Specialist	en	information-and-network-security	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.