Comparison
Free vs paid website vulnerability scanners: what you actually need
"Just use a free scanner" is common advice, and often good advice — up to a point. Here's an honest look at what free tools give you, where they stop, and when paying once is the smarter move.
Free scanners are great for a first look and for learning. They start to hurt when they rate-limit your scans, skip the deeper active tests, or hide the fix details behind a paywall. A one-time paid desktop tool like Web Iron Shield ($49.99, no subscription) removes those limits without a recurring bill.
What free scanners do well
- A fast first look. Point, click, and get a sense of your obvious problems.
- The basics. Missing security headers, obvious misconfigurations, an exposed file or two.
- Learning. Nothing teaches web security faster than watching a scan light up your own site.
Where free scanners stop
- Rate limits. Many cap you at a few scans a day or a few pages per scan — painful when you deploy often.
- Shallow tests. Passive checks are free; the active tests that actually confirm SQL injection, XSS, SSRF, XXE, IDOR and friends are where free tiers thin out.
- Fixes behind a paywall. Plenty of tools tell you "you have 12 issues" and then charge to show you what and how to fix them.
- Your data leaves. Online scanners send your site — and its findings — to a third-party server.
The one-time-payment middle ground
Enterprise scanners solve all of this — for hundreds or thousands of dollars a year. That's overkill for a single site owner, freelancer, or small agency. The middle ground is a one-time desktop purchase: pay once, own it, no subscription.
How Web Iron Shield fits
| Free tier | Pro — $49.99 once | |
|---|---|---|
| Full vulnerability scan | ✓ | ✓ |
| OWASP Top 10 & core checks | ✓ | ✓ |
| Number of scans | Limited | Unlimited |
| 12 active attack tests | — | ✓ |
| AI-assisted analysis | — | ✓ |
| Report export (HTML/JSON/CSV) | — | ✓ |
| Runs locally (data stays on your PC) | ✓ | ✓ |
| Recurring cost | $0 | $0 — one-time |
So which should you pick?
Start free — genuinely. Run the free tier, fix the obvious problems, and learn what your site looks like to an attacker. If you deploy regularly, want the deeper active tests, need exportable reports for a client, or just don't want your site's data leaving your machine, the one-time upgrade pays for itself the first time it catches something a passive scan missed.
"Free" scanners that require you to enter a credit card, or that email you a redacted report and charge to unlock it. A true free tier lets you actually see and fix your findings.
The bottom line
The best website vulnerability scanner is the one you'll actually run — regularly, on your own site, and act on. Free is the right place to start. When free starts limiting you, a one-time $49.99 tool beats both a recurring subscription and doing nothing.
Try it
Start free — upgrade only if you need to
Download Web Iron Shield, run the free tier, and decide for yourself.