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Head-to-head · Anti-Phishing Software

Netcraft Browser Extension vs Avast Online Security & Privacy

Updated Oct 2026
Both researched from official sources
5 checks side by side

Higher score Netcraft Browser Extension #5 in Anti-Phishing Software 8.9/10 Free plan Free plan✓ 4 of 6 features Visit Netcraft

Avast Online Security & Privacy #8 in Anti-Phishing Software 8.5/10 Free plan Free plan✓ 3 of 6 features Visit Avast

Netcraft Browser Extension leads on 0 checks, Avast Online Security & Privacy on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

Highest scoreNetcraft Browser Extension · 8.9/10
Free planboth
Most featuresNetcraft Browser Extension · 4 of 6

Netcraft Browser Extension scores higher on our rubric for anti-phishing software: 8.9 against 8.5 out of 10; our editors rank them #5 and #8.

Netcraft Browser Extension is the better fit for free Chrome protection with credential-leak detection. Avast Online Security & Privacy is the better fit for free Chrome phishing warnings and privacy controls.

Netcraft Browser Extension fits best
Free Chrome protection with credential-leak detection
Avast Online Security & Privacy fits best
Free Chrome phishing warnings and privacy controls

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Show only differences

Feature	Netcraft Browser Extension 8.9/10 Visit ↗	Avast Online Security & Privacy 8.5/10 Visit ↗
At a glance
Editor score	8.9	8.5
Ranking	#5 in Anti-Phishing Software	#8 in Anti-Phishing Software
Best for	Free Chrome protection with credential-leak detection	Free Chrome phishing warnings and privacy controls
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Browser extension	Browser extension
Platforms	Chrome extension	Chrome extension
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business
Features Netcraft Browser Extension 4/6 · Avast Online Security & Privacy 3/6
Phishing URL blocking	✓	✓
Email phishing detection	Not checked yet	Not checked yet
Browser protection	✓	✓
Credential protection	✓ (best)	Not checked yet
Real-time scanning	✓	✓
Threat detection dashboard	Not checked yet	Not checked yet
Our review
Pros	Blocks or warns about known malicious websites, phishing sites, and fake shops Detects credential leaks sent to a different domain Lets users configure protection by attack type	Scans visited URLs and can warn about or block dangerous sites Adds safety indicators to search results to help spot phishing sites Includes anti-tracking, advertiser opt-outs, and cookie controls
Cons	Coverage is limited to a Chrome extension Protection relies in part on Netcraft’s malicious-site data The risk rating for new sites is not a definitive classification	Protection is delivered through a browser extension, not a standalone app Some privacy features require an Avast One or Avast Premium Security subscription Support channels are limited to documentation
Our verdict	Netcraft Browser Extension is a free anti-phishing add-on for Chrome, intended for people who want browser-level warnings about malicious websites without a paid plan. It checks sites against Netcraft’s malicious-site data and can block or… Read the review →	Avast Online Security & Privacy is a free browser extension for people who want warnings about dangerous websites and basic privacy controls while browsing. It checks visited URLs, can block access to dangerous sites including phishing… Read the review →

N Netcraft Browser ExtensionAnti-Phishing Software 8.9Free plan
A Avast Online Security & PrivacyAnti-Phishing Software 8.5Free plan

Compare the top tools in

Strengths and trade-offs

Netcraft Browser Extension — where it wins
- Blocks or warns about known malicious websites, phishing sites, and fake shops
- Detects credential leaks sent to a different domain
- Lets users configure protection by attack type
Where it doesn't
- Coverage is limited to a Chrome extension
- Protection relies in part on Netcraft’s malicious-site data
- The risk rating for new sites is not a definitive classification
Avast Online Security & Privacy — where it wins
- Scans visited URLs and can warn about or block dangerous sites
- Adds safety indicators to search results to help spot phishing sites
- Includes anti-tracking, advertiser opt-outs, and cookie controls
Where it doesn't
- Protection is delivered through a browser extension, not a standalone app
- Some privacy features require an Avast One or Avast Premium Security subscription
- Support channels are limited to documentation

Netcraft Browser Extension8.9/10 · Free plan
Free Chrome protection combines malicious-site warnings with credential-leak detection.
Visit Netcraft Full verdict →
Avast Online Security & Privacy8.5/10 · Free plan
A free browser extension pairing phishing warnings with practical privacy controls.
Visit Avast Full verdict →

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated 21 Oct 2026 · How we research and update