Lightning Pitch: SignBox – Seal secure e-signatures onto PDFs


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Seal secure e-signatures onto PDFs with SignBox app and extension.


Securely and conveniently add your signature onto any PDF document that you receive from the convenience of your smart iOS device. Seal your signature onto any PDF, from anywhere, with SignBox extension. Use your TouchID to store, protect and retrieve your signature. No registration. No cloud signing. Totally within your device. No annual subscription. No monthly fees. Pay once—only $3.99.

Secure. Protected. Convenient—Your signature is only a touch away. Using your TouchID or passcode, seal your protected signature onto any PDF document:

– ONLY accessed by TouchID or passcode. Not stored on any cloud. Your signature remains in your device.

– Your signature will not be editable or copy-able by recipients.

– Add open passwords. Prevent editing, copying or printing after signing.

– Sign with SignBox Extension any PDF document from within any of your favorite apps. All conveniently within your device.

– Your signature will never look better. Smoothened and inked with vector strokes. Fine print on any scale.

– Conveniently add your initials, print your name, add date or even scribble your directives alongside your signature.

– You don’t need to setup an account. No registration. No cloud account. No subscription.


SignEasy, DocuSign, HelloSign, EchoSign to name a few, however they all require subscription and cloud access to seal the signature on the document; not to mention that the document is usually transferred to their cloud. Adding the stroke-based signature onto the PDF within the iPhone/iPad in such a secure and clear fashion IS NOT AVAILABLE. Other competitors offering PDF editing apps do compromise the signature—it being copy-able, removable, printable, editable.

Adding a secure signature on a PDF without the hassle of subscription or account registration is something that is scarce on the App Store. Add to that with SignBox, you only pay a one-time fee—no subscription, no registration, no cloud processing. The signing takes place within the security and convenience of your own device with the permission of your TouchID/passcode.

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The Founder: Sadek Shunnar

Co-Founders: Waleed Mashaqbeh and Khalid Jumaa

Background: 15 years in enterprise solutions—e-payment, archiving and document management, cheque processing, and enterprise portals.

 Signbox logo

HEADQUARTERS: Al Shaeb, Jordan



TWITTER: @Signboxapp



  • Heba Zaidan

    Signing documents has never been so easy, safe and secure.

    The best thing in this app that I do not have to setup an account.
    I can access my documents on iCloud and dropbox through the app.
    and I can use the extension to sign documents from other apps.

    It has very useful features :
    – Adding initials , dates, names and texts.
    – I can set password to protect my signed document.
    – I can prevent editing on my document.

    I highly recommend this application and its extension.

    Reply to Heba Zaidan

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