HomeSolutionsCertificate Transparency
Subdomain & Infrastructure Intelligence

Detect new competitor subdomains before launch day.

Every new subdomain needs an SSL certificate, and every certificate is logged publicly the moment it's issued - before the site goes live. IntelCue watches Certificate Transparency feeds in real time, so a competitor's new subdomains reach you as early signals of what they are about to launch.

Get Access

Only $8.99/month

Cancel anytime, no lock-in

or
MCP-nativeYour live intelligence, available right inside your AI - no extra integrations to build.
Claude
ChatGPT

The earliest signal in competitive intelligence

Every HTTPS website requires an SSL certificate. Every certificate is recorded in public Certificate Transparency logs the moment it's issued - often days or weeks before the site goes live publicly. This makes CT logs the earliest available source of intelligence about competitor infrastructure changes.

When a competitor registers checkout.competitor.com, that subdomain appears in CT logs before a single user visits it. When they stand up enterprise.competitor.com, you see it in CT feeds before the product is announced. IntelCue watches CT logs continuously and surfaces these signals the moment they appear.

This isn't theoretical. Competitive teams who monitor CT logs routinely discover competitor product launches, new market entries, white-label partner programs, and new geographic expansions - all before press releases are issued or marketing campaigns go live.

IntelCue - CT Log Monitor
NEW
checkout.competitor.com
Let’s Encrypt · 14 min ago
Signal: New e-commerce surface
NEW
api.competitor.com
DigiCert · 2 hours ago
Signal: Developer product expansion
enterprise.competitor.com
Let’s Encrypt · 3 days ago
Signal: Enterprise tier launch
How It Works

How it works

01

Add competitor domains to track

Enter the root domains of the competitors you want to monitor. IntelCue immediately begins watching CT log feeds for every certificate issued under those roots.

acme.com
rival-corp.io
competitor.ai
02

CT feeds are monitored in real time

IntelCue continuously ingests Certificate Transparency feeds from major certificate authorities. New certificates typically appear in your feed within minutes of issuance.

Scanning CT logs
03

Get alerted on new subdomains

Each new certificate triggers an alert in your intelligence feed, showing the full subdomain, issuing CA, and timestamp. IntelCue's AI adds context - flagging patterns that suggest product launches, new markets, or brand protection issues.

New certificate issued for beta.rival-corp.io - looks like a staging environment for an upcoming launch.

What you get

Real-Time CT Log Monitoring
IntelCue watches Certificate Transparency feeds continuously. The moment a new SSL certificate is issued under a root domain you track, it appears in your intelligence feed.
Subdomain Discovery
New subdomains often signal upcoming product launches, new market entries, or staging environments going live. IntelCue surfaces these automatically for every domain you track.
Early Launch Detection
SSL certificates are issued before a site goes live. CT monitoring gives you a lead time advantage - sometimes days or weeks before a competitor publicly announces anything.
Watch Your Own Footprint
Track your own root domain and see every certificate issued under it - unauthorised issuance, forgotten staging hosts left publicly resolvable, and subdomains a team spun up without telling anyone.
competitor.com - Subdomains Discovered
app.competitor.com
3 months ago
www.competitor.com
1 year ago
blog.competitor.com
8 months ago
enterprise.competitor.com
3 days ago
checkout.competitor.com
14 min ago
api.competitor.com
2 hours ago
3 new subdomains discovered in the last 7 days
Try it free: Subdomain Finder
See any domain's subdomains from Certificate Transparency logs right now, no signup.
Open Subdomain Finder

Who uses CT monitoring?

  • Competitive intelligence teams who want the earliest possible signal of competitor product launches, market expansions, and infrastructure changes.
  • Security teams watching their own root domain for certificates they did not authorise, and for staging or internal hosts that became publicly resolvable.
  • Product and strategy teams tracking when competitors spin up new capabilities - enterprise tiers, developer products, partner portals - based on subdomain patterns.

Frequently asked questions

What are Certificate Transparency logs?
Certificate Transparency (CT) logs are public, append-only records of every SSL/TLS certificate issued by trusted certificate authorities. They were created by Google to improve security and make certificate issuance auditable. Because every HTTPS website needs an SSL certificate, CT logs effectively capture a real-time record of new sites and subdomains going online.
Why monitor Certificate Transparency logs for competitive intelligence?
CT logs are the earliest available signal of competitor infrastructure changes. When a competitor stands up a new subdomain - a product site, a docs portal, a pricing page, a staging environment - it needs an SSL certificate before it can serve traffic. That certificate appears in CT logs, sometimes days or weeks before the launch is public. Monitoring CT logs gives you lead time that no other source can match.
What can CT logs reveal about competitors?
Certificate Transparency logs reveal new subdomain creation (e.g., product.competitor.com, api.competitor.com, app.competitor.com), wildcard certificate issuance (suggesting major infrastructure buildouts), and certificate renewals for existing properties. Subdomains in particular are rich signals: checkout.competitor.com might indicate e-commerce, docs.competitor.com suggests a developer product, and careers.competitor.com signals active hiring.
How quickly do new certificates appear in CT logs?
Most certificate authorities submit certificates to CT logs within seconds to minutes of issuance. IntelCue checks CT feeds continuously and typically surfaces new certificates within minutes of them appearing. This is significantly faster than waiting for web crawlers to discover a new site or for a competitor to announce publicly.
Can I monitor any domain, not just direct competitors?
Yes - any company whose root domain you can name: a partner, an acquirer, an adjacent player, or your own. You add the root domain and IntelCue watches CT logs for every certificate issued under it, surfacing each new subdomain as it appears. What it does not do is scan the entire certificate stream for a brand keyword, so it will not discover a company's brand-new domain registrations under a name you have not given it. Monitoring is keyed to the roots you name.

Explore more IntelCue solutions

New to the topic? Browse the competitive intelligence glossary.

Related reading

Stop finding out about launches after the fact

CT monitoring is the one signal that gives you a head start.

Only $8.99/month·Cancel anytime, no lock-in