Intelligence on every online business
ListSignal tracks 40M+ online businesses by monitoring the internet's infrastructure in real-time — not by scraping web pages or buying third-party lists. Our data comes directly from the protocols that power the internet itself.
How the data pipeline works
Most business intelligence platforms rely on periodic web scraping — visiting millions of websites and parsing their HTML. This approach is slow, expensive, and produces stale data. ListSignal takes a fundamentally different approach by monitoring internet infrastructure signals that change in real-time.
Certificate Transparency
Every SSL certificate issued globally is logged publicly. We monitor these logs in real-time to discover new domains within minutes of launch.
DNS Analysis
MX records reveal email providers, TXT records expose SaaS integrations (Stripe, Salesforce, HubSpot), and SPF records map the full email infrastructure.
BGP Routing
IP-to-ASN resolution identifies hosting providers, CDNs, and true geographic locations — data that HTTP headers alone cannot provide.
HTTP Intelligence
Lightweight HTTP requests detect technology stacks, marketing tools, JavaScript frameworks, and CMS platforms through response header and body analysis.
Why data freshness matters
Industry data shows that B2B contact records decay at 30% annually. Technology stacks change even faster — a store installing Klaviyo today is a hot lead for a marketing agency this week, not three months from now when a traditional database would detect the change.
ListSignal's continuous monitoring pipeline detects infrastructure changes within days. When a Shopify store adds a new app, upgrades to Shopify Plus, switches CDN providers, or sets up new email authentication — ListSignal captures it on the next scan cycle, typically within 7 days.
Built for agencies, SaaS teams & investors
Agencies use ListSignal to find new clients by technology gaps — Shopify stores without proper analytics, ecommerce brands missing email authentication, growing businesses on inadequate hosting.
SaaS sales teams use ListSignal to identify companies using competitor products, find stores that match their ideal customer profile, and prioritize outreach by business size and technology sophistication.
Investors use ListSignal to track ecommerce market trends, identify fast-growing stores by infrastructure complexity growth, and benchmark portfolio companies against industry peers.
App developers use ListSignal to find installation targets — stores that would benefit from their Shopify app based on current technology stack and missing capabilities.
What makes ListSignal different
Infrastructure-first data collection — we don't scrape storefronts. We monitor the protocols that power the internet: SSL certificates, DNS, BGP, and HTTP. This produces more accurate, more comprehensive, and fresher data than traditional web crawling.
Real-time freshness — Certificate Transparency logs are monitored continuously. DNS and HTTP enrichment runs weekly. Most platforms update monthly or quarterly.
Email deliverability signals — beyond detecting whether a store has email, we analyze MX records, SPF authentication, and DMARC policies to assess email infrastructure health. This is uniquely valuable for cold outreach professionals.
Transparent pricing — no hidden fees, no annual lock-in, no credit systems. Simple monthly plans starting at $49/month for full access.