GRAPH EXPLORER

Unlock the full attack surface

Continuously scanning the S&P 500's public attack surface

241,652 subdomains mapped across all 520 constituents · last full index scan July 29, 2026

The free report is a one-time snapshot of a single domain. The Graph Explorer maps every subdomain, technology, and CVE across the whole corporate ecosystem into one interactive, continuously-monitored graph. Try it free for 14 days.

 Free reportGraph Explorer
ScopeOne domain, one-timeWhole ecosystem, continuous
Subdomains & live hosts✓✓
Tech & version detection✓✓
Version-matched CVEsTop 5Every CVE
Open ports & services—✓
Interactive graph—✓
Continuous monitoring & alerts—✓
Subsidiary & brand discovery—✓
Monthly
$49/month
Billed monthly. Cancel anytime.
Start free trial
2 months free · Most popular
Annual
$490/year
Just $41/mo — pay for 10 months, get 12.
Start free trial →

Enterprise ASM platforms start at $2,500/month. NullBlocks is $49/month — less than one hour of consulting time.

14-day free trial  ·  Cancel anytime  ·  Secured by Stripe

30-day money-back guarantee. If NullBlocks isn't useful to you in the first 30 days, we'll refund every cent — no questions asked.

No account needed to view pricing — you'll sign in at checkout. Already a member? Sign in

How does the free trial work? You get full Explorer access for 14 days. We collect a card at signup but don't charge until the trial ends — cancel any time before then and you pay nothing.
Can I cancel anytime? Yes — one click from your account. You keep access through the period you've already paid for.
What do I get beyond the free report? The report is a snapshot of one domain. The Explorer is the full picture — every subdomain, technology, CVE, and open port across the corporate ecosystem, mapped and monitored continuously.
Is checkout secure? Payments are handled entirely by Stripe; we never see or store your card details.