Sentrytex vs SecurityTrails
Last updated: April 2026
TL;DR
SecurityTrails and Sentrytex monitor different layers of your security posture. SecurityTrails is a domain, DNS, and passive-DNS intelligence platform — it maps subdomains, historical DNS records, certificate transparency logs, and exposed infrastructure for attack-surface management. Sentrytex monitors the SaaS vendors in your stack for breaches and CVEs. SecurityTrails answers "what infrastructure of mine is reachable from the internet". Sentrytex answers "which of my vendors has just had a security incident". Larger security teams often run both.
Comparison at a glance
| Feature | Sentrytex | SecurityTrails |
|---|---|---|
| Primary use case | Vendor breach and CVE alerts for your SaaS stack | Domain, DNS, and passive-DNS intelligence; external attack-surface mapping |
| What it monitors | External SaaS vendors via CISA KEV, NVD, GHSA, and vendor disclosure feeds | DNS records, subdomains, certificate transparency, WHOIS, historical infrastructure data |
| Alert latency | Under 60 minutes from verified disclosure | Continuous data collection; alerting depends on plan |
| Pricing | Solo $9/mo, Team $29/mo. 7-day trial. | Free tier: 10,000 API credits/month. Paid pricing not publicly disclosed — contact sales. [verified May 2026] |
| Free tier | 7-day trial, then paid | Yes, limited query volume |
| Best for | Founders and small teams who depend on SaaS vendors and want breach alerts | Security teams doing attack-surface management, threat intel, or M&A diligence |
What each tool monitors
SecurityTrails is an intelligence platform. Its core product is a huge index of DNS and infrastructure data — current and historical — that you query via API or web UI to understand what infrastructure is associated with a domain, an IP, or an organisation. You'd use it to find forgotten subdomains, audit DNS changes, or fingerprint an attacker's infrastructure.
Sentrytex is an alerting service. It polls vendor security disclosures, CISA KEV, the NVD, and the GitHub Advisory Database every 30 minutes and notifies you when a tool in your registered stack is affected. You don't query Sentrytex; Sentrytex notifies you.
Different shapes of product, different signals.
Alert latency
SecurityTrails continuously collects DNS and infrastructure data. How quickly you see changes depends on which alerting features your plan includes — many use it more as an interactive intelligence tool than a real-time alerting system.
Sentrytex delivers verified alerts within 60 minutes of disclosure. The latency target is the product.
Pricing
Sentrytex is two plans: Solo at $9/month, Team at $29/month. Both include a 7-day free trial.
SecurityTrails offers a free tier of 10,000 API credits/month. Paid pricing is not publicly disclosed — you contact sales for a quote, and reported deals land in the multi-thousand-dollars-per-month range. [verified May 2026] It's priced as a professional intelligence tool, not a SaaS subscription for small teams.
When to pick SecurityTrails
Pick SecurityTrails if you need to map and monitor your external attack surface — subdomains you've forgotten, exposed services, historical DNS, certificate issuance patterns. It's also the right tool for threat-intel work, due-diligence research, and incident-response forensics. Sentrytex won't tell you that your dev subdomain is pointing at an abandoned S3 bucket.
When to pick Sentrytex
Pick Sentrytex if you depend on a handful of SaaS vendors and want to know the moment one of them has a security incident. You don't need a SOC. You don't want an intelligence platform you log into. You want a clean alert when Vercel has a breach, Stripe has a CVE, or GitHub gets supply-chain-compromised. SecurityTrails has no visibility into vendor-side events.
For a security team running an established programme, both tools serve different needs. For a small team or solo founder, Sentrytex covers the vendor-side question at a fraction of the price.
Get started
Sentrytex is $9/month for Solo, $29/month for Team, with a 7-day free trial on either. See pricing for the current breakdown, or join the waitlist if you're still scoping.
Reading other comparisons? See vs Sentry.io, vs Snyk, vs UpGuard.