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The five free tools do not require an account.

Email security · Empire Security

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
Hosted email and inbox filtering	No

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

Hosted email and inbox filtering

Vendor / scope	Price	Source
Proton Business suite; dynamic selection	UNVERIFIED vendor page, 2026-11-05 UTC	UNVERIFIED

What this is not

The Door does not provide hosted email and inbox filtering.

Proton (Mail, VPN, Drive, Pass)

Gap: Hosted private email and VPN services

Why consider it: Consider Proton (Mail, VPN, Drive, Pass) when comparing hosted private email and vpn services. 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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