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OpenDNS: The Security Layer You Forgot Exists
How a 20-year-old DNS giant quietly protects 90M users and why Cisco bought it for $635M
Before your browser even loads a page, OpenDNS has already scanned the destination and decided if you're allowed to go there. This isn't antivirus software—it's the internet's invisible bouncer, and it's been stopping attacks since 2006.
"OpenDNS doesn't wait for malware to execute—it blocks the malicious domain before the connection even happens."
The Silent Majority of Traffic
With 69% direct traffic and only 23% organic search, OpenDNS doesn't need to shout. Users type 'opendns.com' directly because it's either pre-configured on their router or they've bookmarked it. This isn't a startup chasing SEO—it's infrastructure. The 4.2M monthly visits are mostly sysadmins, parents, and privacy-conscious users who've made OpenDNS their default resolver. The real number? Cisco claims 90M users globally, but the public site only shows a fraction of that activity.
The Cisco Acquisition Play
OpenDNS wasn't bought for its $30.7M revenue—it was acquired for its threat intelligence. Cisco dropped $635M in 2015 to own the DNS layer, folding it into their Umbrella platform. Today, OpenDNS operates as a gateway drug to Cisco's enterprise security stack. The $54M in funding was a sprint to scale before the big exit, and it worked. The company's 20-year run started with free DNS filtering and evolved into a cloud-delivered security platform that predicts attacks before they happen.
The tech stack tells the story: jQuery and Bootstrap (classic), Tailwind CSS (modern), plus LinkedIn, Twitter, and Microsoft tracking pixels. They're not hiding from analytics. OneTrust handles privacy compliance, while Sentry monitors errors. This is a mature product that moves deliberately—no flashy frameworks, just reliable infrastructure that needs to work 99.999% of the time.
- FamilyShield filters porn and malware with two DNS addresses—no account needed
- OpenDNS Updater is the most-named keyword after the brand itself (1,390 monthly searches)
- 3.1/5 Trustpilot rating from just 7 reviews suggests enterprise users don't bother with review sites
DNS is the new perimeter
OpenDNS proves that security doesn't need to be complex—sometimes the best defense is simply refusing to connect to the bad guys in the first place.
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Cloud Delivered Enterprise Security by OpenDNS
Predict and prevent attacks before they happen using our cloud-delivered enterprise security service. Protect any device, anywhere with OpenDNS.
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Reviews (6)
I use opendns currently
I use opendns on my Xbox one because I don’t want to use my isp’s dns server. It works real well for me. If you encounter an isp block just use opendns or if the block is super advanced use proton vpn.
No1 Choice for DNS!
No1 Choice for DNS! Absolute protection for your home or business network!!! Excellent Support!
100% recommended
100% recommended. For a house is a lot. Is effective and very simple to use.
Free and easy to set up
The setup of OpenDNS Parental Controls was a breeze, and I didn't have to download anything! Great phishing protection and adult site blocking.
Comprehensive Service
I would highly recommend OpenDNS to any one looking for a flexible and comprehensive DNS solution - either for home or business/enterprise use. OpenDNS offer an exceptional range of services, all based on what would appear to be a highly reliable global infrastructure. Having used OpenDNS for a number of years, I am yet to experience any problems or issues and would certainly recommend their services.
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About opendns.com
Predict and prevent attacks before they happen using our cloud-delivered enterprise security service. Protect any device, anywhere with OpenDNS.
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Technology Stack
opendns.com uses 13 technologies across their website including Font Awesome, HSTS, Sentry, and more.
Fonts
Font Awesome
Security
HSTS
Error Tracking
Sentry
Cloud & Hosting
AWS CloudFront
Privacy & Consent
OneTrust
Advertising
Microsoft Ads, Twitter Pixel, LinkedIn Insight Tag
Traffic & Audience
opendns.com receives approximately 4.2M monthly visitors and ranks #12,578 globally. The website has a bounce rate of 31% with visitors viewing an average of 3.8 pages per visit. Users spend an average of 1:54 on the site.
The majority of opendns.com's traffic comes from undefined, undefined, .
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This page provides publicly available information about opendns.com. Data is collected from various public sources and may not always be up to date. For the most accurate information, please visit opendns.com directly at https://opendns.com.