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BackBox.org – A Free Open Source Community Project — 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
bitdefender.com ↗	124 match 24 shared linkers · same topic	Bitdefender - Weltspitze in Cybersicherheit	de	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
avast.com ↗	120 match 24 shared linkers · same topic	Avast \| Free Antivirus & VPN herunterladen \| gratis + einfach	de	information-and-network-security Adobe Experience Manager	robotsllmsaihumans	emailphone	none
blackarch.org ↗	87 match 13 shared linkers · same topic	BlackArch Linux - Penetration Testing Distribution	en	information-and-network-security	robotsllmsaihumans	emailphone	none
archlinux.org ↗	72 match 25 shared linkers · same topic	Arch Linux	en	operating-systems	robotsllmsaihumans	emailphone	none
fedoraproject.org ↗	62 match 25 shared linkers · same topic	Fedora Linux \| The Fedora Project		operating-systems	robotsllmsaihumans	emailphone	none
proton.me ↗	60 match 12 shared linkers · same topic	Proton: Privacy by default	en	information-and-network-security	robotsllmsaihumans	emailphone	none
ubuntu.com ↗	54 match 24 shared linkers · same topic	Enterprise Open Source and Linux \| Ubuntu	en	operating-systems	robotsllmsaihumans	emailphone	none
debian.org ↗	38 match 25 shared linkers · same topic	Debian -- The Universal Operating System	en	operating-systems	robotsllmsaihumans	emailphone	none
sourceforge.net ↗	37 match 26 shared linkers · same topic	Compare B2B Software, Download, & Develop Open Source & Business Software - SourceForge	United States~ en	software-and-applications	robots llmsaihumans	emailphone	none
openssf.org ↗	73 match shared topic	Open Source Security Foundation – Linux Foundation Projects	en	information-and-network-security WordPress	robots llmsaihumans	emailphone	none
ostif.org ↗	73 match shared topic	OSTIF.org – Securing Open Source for the World	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	emailphone	none
coreinfrastructure.org ↗	73 match shared topic	Open Source Security Foundation – Linux Foundation Projects	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
owasp.org ↗	67 match shared topic	OWASP Foundation, the Open Source Foundation for Application Security \| OWASP Foundation	en	information-and-network-security	robotsllmsaihumans	emailphone	none
bunkerweb.io ↗	67 match shared topic	BunkerWeb - The open-source Web Application Firewall (WAF)	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
pfsense.org ↗	67 match shared topic	pfSense® - World's Most Trusted Open Source Firewall	en	information-and-network-security	robotsllmsaihumans	emailphone	none
insecure.org ↗	67 match shared topic	Insecure.Org - Nmap Free Security Scanner, Tools & Hacking resources	en	information-and-network-security	robotsllmsaihumans	emailphone	none
opnsense.org ↗	67 match shared topic	OPNsense® is an open source, feature rich firewall and routing platform, offering cutting-edge network protection. - OPNsense	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
chainguard.dev ↗	67 match shared topic	The trusted source for open source \| Chainguard	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.