The topic I stopped treating every DNS server the same after comparing these 4 popular options is currently the subject of lively discussion — readers and analysts are keeping a close eye on developments.
This is taking place in a dynamic environment: companies’ decisions and competitors’ reactions can quickly change the picture.
Most of the time, when I’ve seen people swap DNS servers, they are looking for a speed boost. I also wanted to go for speed. However, after benchmarking my options — Google Public DNS (8.8.8.8), Cloudflare (1.1.1.1), OpenDNS (208.67.222.222), and Quad9 (9.9.9.9) — speed became less significant and less interesting in my findings.
I was testing for performance, privacy, and security, and it became evident that, contrary to what I’ve always thought, these DNS server options aren’t interchangeable.
I ran my benchmark using DNS Benchmark, which measures cached lookups, uncached lookups, and dotcom lookups. These are speed tests that reveal efficiency, processing power, connectivity, and consistency. This was what the test revealed:
For speed, Cloudflare was the obvious winner, and a standard deviation of 0.002 proves that it seldom spikes. In cached lookups, Google lagged by about 10 times in cached response times. Google also shows noticeable unpredictability, with a standard deviation of 0.086. Even though OpenDNS and Quad9 were slower than Cloudflare, they showed very good consistency. None of the four options dropped queries, scoring perfectly for reliability.
The millisecond gaps may seem too insignificant to worry about. However, there is a broader context to consider: modern web pages aren’t just making a single DNS request. From ad networks and CDNs to fonts and analytics scripts, a single web page can contact between 30 and 80 separate domains, each triggering its own DNS lookups. So the roughly 100ms gap between Cloudflare and Quad9 can compound quickly and become visible at the page level on resource-heavy pages.
In daily use, I didn’t notice any significant change when switching between providers, as expected. A switch would only be obvious if the current DNS is really slow. However, consistency data is a significant element because unpredictable spikes cause slowdowns that are hard to pinpoint.
Your DNS resolver can see your browsing behavior, and this makes it critical to know who runs the resolver and how they use your data.
Retained while account is active; “as needed” per Cisco policy
It’s important to understand why the distinctions in the data above matter. Providers make promises in their privacy policies, and audits reveal how they uphold their pledges. However, real accountability is shown when an independent auditor verifies live system configurations. This means that of the four providers, three are hoping you take their word for it, and only one has opened itself up for third-party verification as proof.
Jurisdiction also plays a vital role. All providers headquartered in the US are subject to US legal processes. Sometimes, this may compel data disclosure without notifying the user. Quad9, based in Switzerland, is not in the EU and is not subject to U.S. jurisdiction. Switzerland has one of the strictest federal data protection laws globally, which means Quad9 can’t be compelled to retain or hand over query data.
But does any of this practically affect you? Normal browsing on a home network should not pose any major risk from any of the four providers. When you’re setting up DNS for a larger deployment — such as a whole household, a small office, or any network where multiple users’ browsing runs through the same resolver — it matters more who holds that data, especially the legal framework under which they operate.
DNS-level security can block a malicious domain during lookup — before the device connects, downloads anything, or loads the page. It’s better than browser extension security, which protects only what runs in the browser.
Neutral resolver (resolves all domains without intervention)
Separate IP addresses unlock progressively stricter filtering
80+ content categories; configurable per network via account dashboard
Requires free account to customise; FamilyShield (208.67.222.123) works without an account
Feeds from 20+ independent threat intelligence partners; unfiltered version at 9.9.9.10
The differences shown in the table reflect trade-offs you will experience in real-world use. More filtering can sound like a better option, but it can also exclude things that should pass, especially if the domain is newly registered. Google is neutral mainly because there is a cost to false positives. Quad9 reduces the risk of false positives by using multiple reputable scoring systems and blocking a domain only if it appears in several of these independent feeds.
However, security and content filtering create a more significant distinction. Security filtering actively blocks harmful domains, while content filtering blocks by category; only Cloudflare and OpenDNS offer both types, with OpenDNS allowing customizable rules and Cloudflare providing fixed presets. This makes OpenDNS a better option when you need to draw finer lines, and Cloudflare easier for times when the presets suffice.
Cloudflare (1.1.1.1) is my primary DNS. It’s fast but also has independently audited privacy practices. I also use Quad9 (9.9.9.9) as my secondary DNS provider if there is a problem with Cloudflare, mainly because it has built-in malware protection.
None of the options is the same, and I recommend choosing one based on what matters most to you. Here’s a guide to the best fit:
Of course, I have explored four of the most popular options here, but there are other alternatives like NextDNS, which I love because of the granular control.
GRC’s DNS Nameserver Performance Benchmark is a specialized utility that simultaneously analyzes the speed, reliability, and security of several DNS resolvers.