Can I start without an account?

The five free tools do not require an account.

External scanning

Intruder offers recurring asset discovery and deeper checks.

Compare the actual work

Capability	Door
Header presence check	Yes — try it
Published DMARC and SPF records	Yes — try it
PDF text under black drawings and invisible text	Yes — try it
Local search-readiness checklist	Yes — try it
Continuous external attack-surface scanning	No

Vendor / scope	Price	Source
Intruder Asset-dependent configuration	UNVERIFIED vendor page, 2026-11-05 UTC	UNVERIFIED

What this is not

The Door does not provide continuous external attack-surface scanning.

Intruder

Gap: Specialist vulnerability assessment

Why consider it: Consider Intruder when comparing specialist vulnerability assessment. Check the scope and terms directly before choosing.

Prices read from the vendor's page on 2026-11-05. Confirm the current price with the vendor.

Some links on this page are partner links. If you buy through one, a commission may be paid at no extra cost to you. Recommendations are chosen on fit, not commission; prices were read from the vendor's page on the date shown.

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