Certificate Transparency Logs Search
crt.sh (crtsh.net) earns a Brand Analyzer score of 48 out of 100, placing it in the Early Stage tier among Technology brands, SaaS brands. Among 9683 Technology brands analyzed, crt.sh ranks in the 3rd percentile (category average 69, leader 97). The score combines seven dimensions - name quality, digital presence, visual identity, messaging clarity, trust foundation, AI discoverability, and brand authority - into a single objective benchmark. Dimension scores: Name Quality 80/100, Digital Presence 68/100, Visual Identity 0/100, Messaging Clarity 100/100, Trust Foundation 32/100, AI Discoverability 18/100, Brand Authority 34/100.
crt.sh is a free public web interface for querying Certificate Transparency (CT) logs, enabling users to search and explore SSL/TLS certificates that have been publicly logged. It serves cybersecurity professionals, developers, IT security teams, and researchers who need real-time access to certificate data for security monitoring and PKI research. The tool is positioned as a leading free search resource for Certificate Transparency logs and is used widely across the security community.
| Brand Name | crt.sh |
|---|---|
| Domain | crtsh.net |
| Industry | Technology, SaaS |
| Main Competitors | Censys, Shodan, SecurityTrails, Google Certificate Transparency, Facebook Certificate Transparency Monitoring, SSLMate Cert Spotter |
Moz Domain Authority 6/100 vs category average 29 / leader 100 - limited third-party links, so AI systems rarely encounter mentions of the brand.
Ranked #72,075 on the Tranco list of most-visited sites - strong traffic reinforces the brand's prominence to AI models.
crt.sh has a dedicated Wikipedia entity - a top-weighted signal AI models rely on to identify and describe the brand.
The homepage meta description reads "crt.sh provides a free public search interface to query Certificate Transparency logs for SSL certificates." (No meta description) - this is the summary AI engines are most likely to quote.
Structured data on the homepage: No structured data or Open Graph tags detected. Adding Organization and FAQ schema would further help AI crawlers parse the brand's identity.
AI-crawler access: No robots.txt found (default: all bots allowed, but explicit file preferred) - robots.txt controls whether engines like GPTBot and ClaudeBot can read the site at all.
Social footprint: verified profiles on Instagram, YouTube, GitHub; no detected presence on X (Twitter), LinkedIn, Facebook - consistent profiles reinforce the brand's identity across the web.
0 Reddit mentions - community discussion signals real-world reputation to AI models.
crt.sh scores 31/100 for AI visibility - how well ChatGPT, Claude, Perplexity and Google AI Overviews can discover, identify and cite the brand.
crt.sh has a weak AI-visibility profile at 31/100 - a proxy for how readily ChatGPT, Perplexity and Google's AI Overviews can recognise and cite it. Its strongest area is visibility (50/100) and its weakest is trust (7/100). It benefits from a recognised Wikipedia company entity, a global traffic rank of #72,075 (Tranco) and open access for AI crawlers (GPTBot, ClaudeBot, etc.). The main gaps holding it back: no strong Wikidata entry, a low Moz Domain Authority of 6/100 and thin schema.org structured data.
Common questions people ask in Google, ChatGPT, Claude, Gemini, Perplexity, and other AI search engines.
crt.sh's main competitors include Censys, Shodan, SecurityTrails, Google Certificate Transparency, Facebook Certificate Transparency Monitoring. These companies compete in the Technology space for similar customers, offering comparable products or services.
Sources: crt.sh official site
crt.sh offers a single core service: a free public search interface for querying Certificate Transparency logs. Through this interface, users can search and explore SSL/TLS certificates that have been publicly logged across major transparency logs. The service provides real-time access to certificate data, supporting use cases such as security monitoring, domain certificate investigation, and PKI research. No additional paid products or tiered service offerings are described in the available information.
Sources: crt.sh official site
crt.sh is a free public search interface designed to query Certificate Transparency (CT) logs for SSL/TLS certificates. It allows users to search and explore all publicly logged certificates across major transparency logs. The service is accessible without cost and is widely used by security professionals and researchers as a tool for monitoring and investigating SSL/TLS certificate issuance within the public key infrastructure (PKI) ecosystem.
Sources: crt.sh official site
crt.sh provides a search interface that enables users to query Certificate Transparency logs in real time. Users can look up SSL/TLS certificates associated with specific domains or organizations, reviewing certificate details as they are logged publicly. This functionality supports security research, domain monitoring, and the detection of unauthorized or fraudulent certificate issuance. The service operates without any cost to the user, offering broad access to certificate transparency data.
Sources: crt.sh official site
Popular alternatives to crt.sh include Censys, Shodan, SecurityTrails, Google Certificate Transparency, Facebook Certificate Transparency Monitoring. Each is an established option in the Technology space; the best fit depends on your specific needs, budget, and required features.
Sources: crt.sh official site
crt.sh has limited AI-search visibility, scoring 31/100 on Brand Analyzer's AI visibility composite (visibility 50, trust 7, recommendation 27). This estimates how likely AI engines like ChatGPT, Claude, Gemini and Perplexity are to know, trust, and recommend the brand.
Sources: crt.sh official site
crt.sh and Censys are competitors in Technology. They target overlapping audiences; the right choice depends on your specific needs and priorities.
Sources: crt.sh official site
crt.sh is used by cybersecurity professionals, developers, IT security teams, and researchers. These users typically rely on the platform for monitoring SSL/TLS certificates associated with their domains or organizations, conducting security research, investigating potentially unauthorized certificate issuance, and working within the broader public key infrastructure (PKI) space. The tool is positioned for a technically oriented audience engaged in certificate transparency, internet security, and related disciplines.
Sources: crt.sh official site
crt.sh is known for being the leading free search tool for Certificate Transparency logs. It is trusted by security professionals worldwide for its ability to provide real-time, open access to publicly logged SSL/TLS certificate data. The platform is particularly recognized in the cybersecurity community as a go-to resource for certificate monitoring, PKI research, and identifying potentially malicious or unauthorized certificates tied to specific domains.
Sources: crt.sh official site
Based on the known facts, crt.sh is described as a tool trusted by security professionals worldwide and positioned as the leading free search interface for Certificate Transparency logs. Its data is sourced directly from public Certificate Transparency logs, which are maintained by recognized entities in the internet security ecosystem. This grounding in publicly verifiable, standardized log data underpins its reputation for reliability among cybersecurity professionals, developers, and IT security teams.
Sources: crt.sh official site
crt.sh is popular primarily because it offers free, real-time access to Certificate Transparency log data without requiring registration or payment. It serves a broad audience of cybersecurity professionals, developers, IT security teams, and researchers who need to monitor SSL/TLS certificates for security purposes. Its ease of use and comprehensive search capabilities across major transparency logs make it a widely adopted tool within the security community for PKI monitoring and research.
Sources: crt.sh official site
crt.sh scores 27/100 on Brand Analyzer's AI recommendation signal, indicating it is less likely to be surfaced when AI assistants like ChatGPT suggest Technology options. Recommendation depends on crawlability, structured data, and category authority; a Wikipedia presence helps.
Sources: crt.sh official site
crt.sh can improve AI discoverability by strengthening structured data (Organization and FAQ schema), maintaining an accurate Wikipedia/Wikidata entity, earning authoritative citations, and keeping content crawlable for AI bots. Brand Analyzer measures these as visibility, trust, and recommendation signals.
Sources: crt.sh official site
Ranked closest to crt.sh: Costello (48/100), Coovee (48/100), Zapya (48/100), Didi Static (48/100).
A step up - brands to learn from: Zindo (56/100), Zentis Intel (56/100).
Category leader: Accenture (97/100).