Diigo.com (Domain) Investigation Report
Generated on Mar 7, 2026
Why we think so?
Diigo.com is a research tool and knowledge-sharing community known for its web annotation and bookmarking features. It attracts about 816,000 monthly visits, mainly from India and the US. The site uses reliable server technologies like AWS and Google Analytics. Its SSL certificate is valid and issued by E7. Diigo holds a live trademark registered in the US since 2013. Reviews praise its core web tools but note an outdated interface and poor mobile app performance. There are no scam or phishing blacklists issues or legal disputes found. Overall, Diigo appears legitimate and safe with good functionality but could improve its mobile experience and user interface.
Risk Insights
Legitimate Web Service with Solid Usage
- About 816,000 monthly visits with diverse global audience
- Uses secure HTTPS with a valid SSL certificate
- Holds an active US trademark since 2013
User Experience Concerns
- Mobile app suffers from slowness and crashes
- Interface looks outdated and confusing to some users
- Limited mobile PDF and offline support
No Scam or Blacklist Flags
- Clear of phishing and malware blacklists
- No detected scam reports or fraudulent billing issues
- Positive overall user feedback on core functionalities
Category Scores
Red Flags & Warnings
- Mobile app has frequent complaints about slowness, crashes, and poor user experience.
- User interface is considered outdated and confusing by some users, impacting usability.
Detailed Checks & Insights
0-100 Scale
Domain traffic and reputation
Score: 90
Domain traffic and reputation
"With nearly 1 million monthly visits and a strong presence in multiple countries, Diigo shows stable traffic."
Reason: Traffic volume and geographic diversity indicate legitimate and active usage.
Technical infrastructure and security
Score: 90
Technical infrastructure and security
"SSL runs on latest standards; uses AWS and Google tools for hosting and analytics."
Reason: Site uses HTTPS and reliable hosting with valid SSL certificate and recognized technologies.
Blacklist and phishing status
Score: 95
Blacklist and phishing status
"Free from malware and phishing flags, reducing risk for users."
Reason: No listings found in crypto scam blacklists or Google Safe Browsing database.
User feedback and product reputation
Score: 75
User feedback and product reputation
"Positive core features but mobile experience needs improvement per user reviews."
Reason: Users praise web annotation tools; mobile app and UI design are common complaints.
Legal and trademark status
Score: 85
Legal and trademark status
"No notable legal disputes or regulatory actions found."
Reason: Active US trademark and terms specify California jurisdiction with arbitration clauses.
Contact and social presence
Score: 85
Contact and social presence
"Includes service, info, webmaster, and care emails plus multiple social profiles."
Reason: Multiple valid contact emails and active social media accounts verified.
Your Next Steps
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1
Use strong, unique passwords with Diigo accounts and enable security features if available.
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2
Be cautious when using the mobile app, as users report slowness and crashes.
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3
Review the privacy policy carefully to understand data usage and retention.
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4
Monitor for updates on the mobile app and UI improvements.
Key Evidence & Citations
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SimilarTech profile for diigo.com
⤷ Technical stack and traffic overview showing stable site technology use and visits.
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SimilarWeb analytics for diigo.com
⤷ Traffic source, user engagement, and geographic distribution data.
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Diigo trademark registration on USPTO
⤷ Shows valid trademark with registration since 2013.
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Google Safe Browsing Report for diigo.com
⤷ No detected malware or phishing threats found.
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User reviews and complaints on Diigo
⤷ Reviews highlight strengths in web annotation and weaknesses in mobile app and UI.
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