AdGuard

VS

Quad9

Cybersecurity Comparison

AdGuard vs Quad9: Side-by-Side Comparison

AdGuard
Quad9
Rating
★★★★★★★★★★
4.7/5
★★★★★★★★★★
4.5/5
Free Tier
Yes
Yes
Trial Days
14-day trial
None
Pricing
Free extension; App from $29.99/year
Free (non-profit)
Company
AdGuard Software Ltd.
Quad9 Foundation
Founded
2009
2016
Best For
Power users wanting complete ad-free experience across desktop and mobile apps
Privacy-first users wanting malware-blocking DNS without any data collection

Pros & Cons

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AdGuard

System-wide ad blocking works across all apps not just browsers
DNS filtering blocks ads at network level without browser extensions needed
Parental control content filtering protects children across all browsers
Stealth Mode aggressively strips all tracking parameters from URLs
No subscription needed for desktop apps; one-time purchase available
Mobile version requires manual VPN profile configuration on some devices
Does not replace full antivirus protection against malware and ransomware

Quad9

Malicious domain blocking using 25 plus threat intelligence providers simultaneously
Strict no-logging policy with no personally identifiable data retained
Non-profit organization with no commercial data monetization incentive
DNSSEC validation ensures responses have not been tampered with in transit
Free with no account registration or configuration beyond changing DNS IP
No content filtering options for parental controls or category blocking
Slightly higher latency than Cloudflare 1.1.1.1 in some geographic regions

Use Case Analysis

Which is better for Privacy?

Both AdGuard and Quad9 support Privacy workflows. AdGuard has a slight edge with a 4.7 rating and System-level ad blocking across all apps with no per-browser extension required. If Privacy is your primary use case, AdGuard is the safer pick.

Which is better for Antivirus?

Both AdGuard and Quad9 support Antivirus workflows. AdGuard has a slight edge with a 4.7 rating and System-level ad blocking across all apps with no per-browser extension required. If Antivirus is your primary use case, AdGuard is the safer pick.

Which is better for Encryption?

Both AdGuard and Quad9 support Encryption workflows. AdGuard has a slight edge with a 4.7 rating and System-level ad blocking across all apps with no per-browser extension required. If Encryption is your primary use case, AdGuard is the safer pick.

Which is better for Endpoint Security?

Both AdGuard and Quad9 support Endpoint Security workflows. AdGuard has a slight edge with a 4.7 rating and System-level ad blocking across all apps with no per-browser extension required. If Endpoint Security is your primary use case, AdGuard is the safer pick.

Which is better for Two Factor Authentication?

Both AdGuard and Quad9 support Two Factor Authentication workflows. AdGuard has a slight edge with a 4.7 rating and System-level ad blocking across all apps with no per-browser extension required. If Two Factor Authentication is your primary use case, AdGuard is the safer pick.

Verdict

AdGuard edges out Quad9 with a 4.7 vs 4.5 rating. AdGuard's main advantage: System-level ad blocking across all apps with no per-browser extension required. That said, Quad9 may still be the better choice if Privacy-first users wanting malware-blocking DNS without any data collection.

Try Them Yourself

The best way to choose is to trial both. See full details on each:

Get AdGuard Free Visit Quad9

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