
Treehouse
edX
Codecademy
Docebo
Pluralsight
Coursera
Free Code Camp
There are tons of online programming courses and tutorials, but it's never easy to find the best one. Try Hackr.io to find the best online courses submitted & voted by the programming community.

NextDNS
1.1.1.1
OpenDNS
OpenNIC
AdGuard DNS
Cisco Umbrella
MullvadDNS
Quad9 is a free, recursive, anycast DNS platform that provides end users robust security protections, high-performance, and privacy.

Which is more popular?
Based on our record, Quad9 should be more popular than Hackr.io. It has been mentioned 49 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | hackr.io | quad9.net |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Hackr.io - Product Demo | Squareboat
More videos
Quad9 9.9.9.9 VS Google 8.8.8.8 Benchmark Testing & Keeping Your Computer safer with Quad9 DNS
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Hackr.io and Quad9. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of Hackr.io yet. Be the first one to post
The company sells itself on its ability to block malicious domains by collecting intelligence from 'a variety of public and private sources.' It's not clear what these sources are, but the website says Quad9 used 18+...
As the name Quad9 suggests, their primary DNS is 9.9.9.9. Quad9’s DNS is fairly easy to remember as the name indicates. Quad9 focuses on security, performance, privacy, and speed. Though it may not be the fastest DNS,...
Quad9 emphasizes security, privacy and performance — the company was founded on the goal to make the internet safer for everyone. It blocks malicious domains, phishing and malware while maintaining your anonymity....
Recommendations tracked on public social media and blogs since March 2021.


I am looking to work with 1 or 2 people on a https://hackr.io/ clone. Source: over 3 years ago
I know a better place, Https://hackr.io. Source: over 3 years ago
Https://hackr.io/ has countless resources. Source: over 4 years ago
So assuming the answer to a query of what something like dev.to is mainly starts at the locally designated DNS servers. This will most likely be your ISP but it's not uncommon to utilize public DNS servers such as Quad9, Google, and... - Source: dev.to / 5 months ago
Maybe consider using https://quad9.net for DNS? It's nice having archive.today work. Otherwise you can always copy/paste the link to TFA into https://archive.org. - Source: Hacker News / about 2 years ago
Automate everything. Use a password manager, enable automatic updates, use DNS malware filtering at router level (Free with https://quad9.net ). Source: almost 3 years ago
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OpenDNS provides faster and safer Internet access for your home or Business.
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