Grammarly
Writing assistant that checks grammar, spelling, punctuation and tone as you type, through browser extensions, desktop apps and a mobile keyboard.
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Security headers: A, 85 out of 100
Number 20 of 95 in the ranking. Missing 2 of the 9 headers we check.
Meets the B minimum (70/100) in our RFP clause.
Missing 2
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Permissions-Policy 0 of 10
Switches off browser features the product does not use, such as camera, microphone, location and payments, for the page and anything embedded in it.
Without it: Any script or iframe on the page, including third-party ads and chat widgets, can ask the user for camera, microphone or location access under the vendor's name.
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Cross-Origin-Resource-Policy 0 of 5
Tells browsers which sites may load this site's resources.
Without it: Other sites can pull the product's responses into their own pages, which makes side-channel leaks of what a signed-in user can see easier.
Sent 7
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Content-Security-Policy 25 of 25
frame-ancestors 'self' *.grammarly.com
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Strict-Transport-Security 20 of 20
max-age=31536000; includeSubDomains
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X-Content-Type-Options 10 of 10
nosniff
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Frame protection 10 of 10
CSP frame-ancestors
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Referrer-Policy 10 of 10
no-referrer-when-downgrade
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Cross-Origin-Opener-Policy 5 of 5
same-origin-allow-popups
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No version disclosure 5 of 5