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Castellancyber alternatives & similar sites

Castellan Cyber | Build, Innovate, Secure — 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
hi-rex.io ↗	70 match 1 shared topics	REX Cyber Security	en	information-and-network-security	robotsllmsaihumans	emailphone	none
samuraisecurity.co.uk ↗	70 match 1 shared topics	Samurai Security: Enabling organisations to innovate, securely.	GB en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	emailphone	none
ozarkcyber.com ↗	70 match 1 shared topics	Ozark Cyber \| Security Done Right	en	information-and-network-security	robotsllmsaihumans	emailphone	none
l7cyber.com ↗	69 match 1 shared topics	Layer 7 Cyber \| Cyber Security	en	information-and-network-security HubSpot	robotsllmsaihumans	emailphone	none
l7bsecure.com ↗	69 match 1 shared topics	Layer 7 Cyber \| Cyber Security	en	information-and-network-security HubSpot	robotsllmsaihumans	emailphone	none
cyber-ia.co.uk ↗	69 match 1 shared topics	Home- Cyber Security	GB en	information-and-network-security	robotsllmsaihumans	emailphone	full · 18
cyberdd.co.uk ↗	69 match 1 shared topics	CyberDD \| Cyber Security	GB en	information-and-network-security Wix	robots llmsaihumans	emailphone	none
techm.co.uk ↗	68 match 1 shared topics	Techm Cyber Security	GB en	information-and-network-security	robotsllmsaihumans	emailphone	none
cyberox.co.uk ↗	68 match 1 shared topics	Cyberox - Innovation In Cyber Technology	GB en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	emailphone	none
2bware.com ↗	68 match 1 shared topics	2Bware Cybersecurity	en	information-and-network-security WordPress	robotsllmsaihumans	email phone	none
stratumsecurity.com ↗	68 match 1 shared topics	Cyber Advisors - Your Cyber Security Partner	en	information-and-network-security HubSpot	robotsllmsaihumans	emailphone	none
maritimecybersolutions.co.uk ↗	68 match 1 shared topics	Maritime Cyber Security	GB en	information-and-network-security	robotsllmsaihumans	emailphone	none
5qglobal.net ↗	68 match 1 shared topics	5Q \| CRE Technology and Cyber Security Experts	US~ en	information-and-network-security	robotsllmsaihumans	emailphone	none
nisystcybersecurity.co.uk ↗	68 match 1 shared topics	Home - Nisyst Cyber Security	GB en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
cyber-security.ie ↗	68 match 1 shared topics	Cyber Security	IE en	information-and-network-security	robotsllmsaihumans	emailphone	none
donotgethacked.com ↗	68 match 1 shared topics	Forus-P Cyber Security	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
stratos-cyber.com ↗	68 match 1 shared topics	Stratos Cyber \| AI-Powered Cybersecurity	en	information-and-network-security	robotsllmsaihumans	emailphone	none
cyber-security-services.co.uk ↗	68 match 1 shared topics	Cyber Security Services	GB 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.