Website scanner, GitHub secret scanning, HIBP breach check, desktop scanner, and dashboard — all free. No credit card. Advanced features like Honeypot Defense, scheduled scans, and API access are coming soon.
These features are in active development. Join the waitlist for priority access and be the first to know when they launch.
Three layers of defense against spam, scams, and robocalls — all included free.
Requires iOS app — currently in development.
Verify before ring. Unknown callers hit an IVR challenge. Robocalls don't press keys, so they never get through. Kills ~95% of automated calls.
Requires Twilio integration — currently in development.
Nessus charges $4,790/yr for vulnerability scanning alone. Intruder starts at $149/mo. Crucible Security offers free website scanning today, with AI agents and deception tech coming soon. Here is how the numbers break down.
| Feature |
CRUCiBLE Security
100% Free
|
Nessus (Tenable)
$399+/mo
|
Sucuri
$9.99+/mo
|
Intruder
$149+/mo
|
|---|---|---|---|---|
| Free scan (no account) |
✓
unlimited, no signup
|
30-day trial
5 IPs only
|
✓
SiteCheck
|
✗
trial only
|
| Starting price |
$0
Everything free
|
$399/mo
$4,790/yr Professional
|
$9.99/mo
firewall only
|
$149/mo
Essential
|
| AI agents included scanning, deception, threat hunting |
✓
Free scanner + agents coming soon
|
✗ | ✗ | ✗ |
| Annual savings vs CRUCiBLE ($0/yr) |
$0
free
|
Save $4,790
$4,790 vs $0/yr
|
Save $200
$199.99 vs $0/yr
|
Save $1,788
$1,788 vs $0/yr
|
Pricing sourced from publicly available pages, May 2026. Nessus: tenable.com/products/nessus. Sucuri: sucuri.net/website-security. Intruder: intruder.io/pricing. Cloudflare: cloudflare.com/plans. All competitor prices shown at their listed rates. CRUCiBLE Security: 100% free.
Everything is free. Sign up for early access to new features and agents as they ship.