crt.sh — August 2026 traffic, keywords & AI visibility

crt.sh draws an estimated 3,814 visits a month from search engines. Effectively all of it is organic — about 3,814 visits from unpaid results. Spread across 215 ranking keywords, that averages roughly 18 organic visits per keyword.

On our AI visibility scale crt.sh earns 84 of 100 points, a grade A. It takes full marks for LLMS.txt and Structured data. The biggest gap is SEO health, at 12 of 20 points (58/100), worth 8 points if closed. It also loses points on Crawlability (5/10) and Company profile (22/25).

The llms.txt on crt.sh runs to 145 lines (6,996 characters) across 12 sections, last generated in March 2026. It introduces the site as "crt.sh". It tells AI engines the business works in Cybersecurity, Information Technology, Web Services and SaaS. It describes 4 products, with prices such as Certificate Transparency Log Search at Free, SSL/TLS Certificate Monitoring at Free and Certificate History Search at Free. Services it lists include Certificate Analysis and Custom Search Queries. The audience it names is Security professionals, web developers, IT administrators, businesses, aged 25-54 (Global). Technologies it mentions include JavaScript, HTML5, CSS, jQuery and PostgreSQL. The keywords it claims start with "certificate search", "CT log", "certificate transparency" and "SSL certificate search".

# crt.sh

## About
crt.sh is a leading online platform that provides a free Certificate Transparency log search tool, enabling users to search for SSL/TLS certificates issued by various Certificate Authorities. The service is particularly beneficial for security professionals, web developers, and businesses looking to enhance their cybersecurity posture by monitoring certificate issuance. By leveraging advanced search capabilities, crt.sh helps users identify potential misconfigurations and fraudulent certificates. This ensures a safer online environment through comprehensive visibility into certificate data across multiple CAs.

**Areas of Work:** Cybersecurity, Information Technology, Web Services, SaaS

## Things to Remember
- **Website:** https://crt.sh
- **Address:** Not Available
- **Contact:** Not Available
- **Phone:** Not Available
- **Hours:** 24/7
- **Timezone:** UTC
- **Currency:** USD
- **Company Type:** Private
- **Employees:** 10
- **Revenue:** Not Disclosed
- **Hiring Status:** Not currently hiring

## Products
- **Certificate Transparency Log Search** (Free): Free web-based tool that allows searching Certificate Transparency logs for SSL/TLS certificates using domain names, serial numbers, issuers, and other parameters.
- **SSL/TLS Certificate Monitoring** (Free): Real-time monitoring and lookup of SSL/TLS certificates issued to specific domains or organization

Google lists crt.sh for about 215 keywords, which together bring an estimated 3,814 organic visits a month.

The latest technical audit of crt.sh scored 76 out of 100 overall. Accessibility is its weakest area at 53, while performance scores highest at 99. The audit makes 14 recommendations in all, and 3 of the 4 listed first are rated high priority or critical.

crt's company profile names certspotter.com and transparencyreport.google.com as competitors. Its own llms.txt adds certificate-transparency.org, ssllabs.com and certificatecheck.com. Outside its market, the domains ranked closest to it in our worldwide ranking are similarsites.com, able2know.org, benetton.com and reanime.to.

certspotter.com

transparencyreport.google.com

certificate-transparency.org

ssllabs.com

certificatecheck.com