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@@ -154,7 +154,8 @@ algorithms, knowledgebase and AI technology.
 * [Browserleaks](https://browserleaks.com/) - BrowserLeaks tests your browser for privacy and fingerprinting leaks
 * [Cisco Talos Intelligence](https://talosintelligence.com/reputation_center) - IP and Domain Reputation Center for real-time threat detection
 * [CiteSeerX](http://citeseer.ist.psu.edu)
-* [Criminal IP](https://www.criminalip.io/) - Cyber Threat Intelligence Search Engine and Attack Surface Management(ASM) platform 
+* [Criminal IP](https://www.criminalip.io/) - Cyber Threat Intelligence Search Engine and Attack Surface Management(ASM) platform
+* [CRT Certificate Search](https://crt.sh) - Allows you to search for public SSL/TLS certificates recorded in Certificate Transparency logs
 * [Google Custom Search](http://www.google.com/cse)
 * [GrayhatWarfare](https://grayhatwarfare.com/) - Searches and indexes open Amazon S3 buckets, allowing users to find and explore potentially exposed data.
 * [Harmari (Unified Listings Search)](https://www.harmari.com/search/unified)