ContractStampExciton Research, LLC
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PQC ImzaZincirX
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Related Products
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ContractStamp:
About
ContractStamp is a fast, secure, and intuitive electronic signature platform designed to eliminate the friction of traditional document signing. Built to streamline workflows for teams and individuals alike, it allows users to upload PDFs, place signature fields, and collect legally binding signatures in minutes—entirely from the browser with no app downloads or credit cards required.
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PQC Imza:
About
PQC Imza is a web-based electronic-signature service that applies ML-DSA-44 (NIST FIPS 204) post-quantum signatures to documents. Senders upload PDFs or prepare documents using templates and an AI-assisted builder, then invite signers and decide which completed signatures to accept. Signers use the PQC Wallet mobile app to verify identity with the NFC chip in an ID card or passport and sign on their phones. The resulting PDF lists signers on each page and includes a QR code for later verification; the document fingerprint and signature records are anchored on SciChain. Customers can buy per-document credits, non-expiring credit packs, or monthly and annual plans; invited signers sign at no charge. The service is designed for individuals and organizations collecting electronic signatures. In Türkiye, these signatures are not qualified secure electronic signatures under Law No. 5070.
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ContractStamp:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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PQC Imza:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Not Supported
Android
Supported
Chromebook
Not Supported
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ContractStamp:
Audience
Companies that need a digital signature platform
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PQC Imza:
Audience
Businesses and individuals who send documents for signature
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ContractStamp:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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PQC Imza:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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ContractStamp:
API
Offers API
Not Supported
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PQC Imza:
API
Offers API
Not Supported
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ContractStamp:
Screenshots and VideosNo images available
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PQC Imza:
Screenshots and VideosNo images available
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ContractStamp:
Pricing
No information available.
Free Version
Supported
Free Trial
Not Supported
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PQC Imza:
Pricing
$9/month
Pay as you go: $2.50 per document. Monthly plans start at $9/month for 10 documents; Pro is $29/month for 40 documents and up to 5 people; Business is $99/month for 200 documents and up to 20 people. One-time credit packs cost $12 for 10, $26 for 25, or $45 for 50 credits; credits do not expire. Invited signers sign free.
Free Version
Not Supported
Free Trial
Not Supported
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ContractStamp:
Reviews/
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PQC Imza:
Reviews/
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ContractStamp:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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PQC Imza:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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ContractStamp:
Company InformationExciton Research, LLC
Founded: 2026
United States
contractstamp.com
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PQC Imza:
Company InformationZincirX
Founded: 2024
United States
pqc-imza.com/en
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ContractStamp:
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PQC Imza:
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ContractStamp:
Categories |
PQC Imza:
Categories |
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ContractStamp:
Integrations
Stripe
Not Supported
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ContractStamp:
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PQC Imza:
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