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Defender99 alternatives & similar sites

DEFEND99 - Self Sanitizing Reusable Mask, Washable Face Mask for Virus Protection — 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

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
malwarebytes.com ↗	10 match shared topic	All-in-One Protection: Antivirus, VPN & Scam Guard \| Best Antivirus	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
surfshark.com ↗	10 match shared topic	Surfshark: identity & scam protection, antivirus, VPN	Netherlands~ en	information-and-network-security WordPress	robots llmsaihumans	emailphone	none
surfshark.net ↗	10 match shared topic	Surfshark: identity & scam protection, antivirus, VPN	Netherlands~ en	information-and-network-security WordPress	robots llmsaihumans	emailphone	none
safer-networking.org ↗	10 match shared topic	Home of Spybot, Your Digital Identity Protection - Spybot Anti-Malware and Antivirus : Spybot Anti-Malware and Antivirus	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
malwarebytes.org ↗	10 match shared topic	All-in-One Protection: Antivirus, VPN & Scam Guard \| Best Antivirus	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
kaspersky.ca ↗	10 match shared topic	Kaspersky Canada - Antivirus Protection for Home & SMB \| Kaspersky	Canada en	information-and-network-security	robotsllmsaihumans	emailphone	none
vicomsoft.com ↗	10 match shared topic	VICOMSOFT - Mac OS X & PC / Spam and Virus Protection / Web Filtering / Application Blocking	en	information-and-network-security	robotsllmsaihumans	emailphone	none
stopsign.com ↗	10 match shared topic	Anti-Virus Web Protection & Spyware Removal \| StopSign™ Internet Security	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
spybot.info ↗	10 match shared topic	Home of Spybot, Your Digital Identity Protection - Spybot Anti-Malware and Antivirus : Spybot Anti-Malware and Antivirus	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
intego.com ↗	10 match shared topic	Intego Mac Security \| Best Antivirus Software for Complete Protection	en	information-and-network-security	robotsllmsaihumans	emailphone	none
surfshark.club ↗	10 match shared topic	Surfshark: identity & scam protection, antivirus, VPN	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
airfloatsystems.com ↗	10 match shared topic	Airfloat Reusable Art Shipping Boxes - Unsurpassed Protection For Framed & Unframed Art	United States~ en	fine-art	robotsllmsaihumans	emailphone	none
dmca.com ↗	5 match shared topic	Content Protection and Takedown Company Since 2006 \| DMCA.com	en	information-and-network-security	robotsllmsaihumans	emailphone	none
epa.gov ↗	5 match shared topic	U.S. Environmental Protection Agency \| US EPA	en	environment Drupal	robotsllmsaihumans	emailphone	none
akismet.com ↗	5 match shared topic	Akismet – Spam Protection for Websites	en	artificial-intelligence WordPress	robotsllmsaihumans	emailphone	none
duckduckgo.com ↗	5 match shared topic	DuckDuckGo - Protection. Privacy. Peace of mind.	en	internet-safety	robotsllmsaihumans	emailphone	none
comodo.com ↗	5 match shared topic	Advanced Website Protection for Unmatched Cyber Defense	en	information-and-network-security WordPress WooCommerce	robotsllmsaihumans	email phone	none
sitelock.com ↗	5 match shared topic	Website Security Monitoring & Malware Protection \| SiteLock	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.