Google's Certificate Transparency alternatives
6 tools in the catalogue cover the same ground as Google's Certificate Transparency and can replace it depending on the need. Each one is reachable, re-checked daily, and listed with its pricing.
- certgraph (T)freeCLI tool that crawls SSL certificates via Certificate Transparency logs to create a directed graph of domain relationships. Supports multiple drivers including crt.sh, Censys, HTTPS, and SMTP.
- CertKit - Certificate Transparency Log SearchfreeFast Certificate Transparency log search tool using Clickhouse for sub-second queries. Discover all certificates issued to a domain, including Subject Alternative Names, to reveal hidden infrastructure.
- crt.sh - Certificate SearchfreeCT log viewer aggregating certificate data from multiple Certificate Transparency logs. Search for all certificates ever issued to a domain to discover subdomains and detect certificate misuse.
- CensysfreemiumInternet-wide scanner and search engine for hosts, certificates, and services.
- CertStreamfreeReal-time certificate transparency log monitoring. Stream newly issued SSL/TLS certificates to discover new domains, phishing sites and infrastructure as they are created.
- Qualys SSL LabsfreeDeep audit of a server's TLS configuration: certificate chain, supported protocols, known weaknesses. The certificate itself often reveals sibling domains.
Google's Certificate Transparency
Domain Name
Directory of all known Certificate Transparency logs monitored by Chrome and other browsers. Browse CT log records to discover issued certificates, identify unauthorized domain certificates, and monitor for certificate misuse.
RECOMMENDED USE
Certificate discovery, unauthorized cert detection, domain monitoring
Information
Video tutorials
Learn to use Google's Certificate Transparency
Suggested workflow
Chain these tools in order for a complete investigation
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CertStream
Domain NameReal-time certificate transparency log monitoring. Stream newly issued SSL/TLS certificates to discover new domains, phishing sites and infrastructure as they are created.
crt.sh - Certificate Search
Domain NameCT log viewer aggregating certificate data from multiple Certificate Transparency logs. Search for all certificates ever issued to a domain to discover subdomains and detect certificate misuse.
CertKit - Certificate Transparency Log Search
Domain NameFast Certificate Transparency log search tool using Clickhouse for sub-second queries. Discover all certificates issued to a domain, including Subject Alternative Names, to reveal hidden infrastructure.
certgraph (T)
Domain NameCLI tool that crawls SSL certificates via Certificate Transparency logs to create a directed graph of domain relationships. Supports multiple drivers including crt.sh, Censys, HTTPS, and SMTP.
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