ProofSign
ProofSign is an electronic-signature and document-verification platform for individuals, professionals, teams and organizations signing finished PDFs. Users upload documents, invite signers and approvers, and run single- or multi-party workflows. Participants verify email access with a one-time passcode. ProofSign records signing intent, participant actions and timestamps in an audit trail. Completed PDFs include a SHA-256 fingerprint and evidence recipients can check through a public verifier without an account. The service supports agreements and finalized documents that need an auditable signing record and a way to detect later file changes. Its free plan allows single-party signing and verification for up to 10 documents monthly under fair use. Users can earn credits through onboarding and signing milestones. The Pro plan includes a verification API.
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Majik Signature
Majik Signature is a hybrid post-quantum digital signing application that lets you sign virtually any file—PDFs, Office documents, images, audio, video, source code, archives, and more—to prove authenticity, integrity, and ownership.
Everything happens locally on your device. No accounts are required for offline signing and verification, and your files are never uploaded to our servers.
Every signature combines Ed25519 with ML-DSA-87 (Post-Quantum, NIST FIPS 204). Both algorithms must verify, protecting files against today's threats while preparing for the quantum era.
Signatures are embedded into supported file formats whenever possible while preserving compatibility. Features include batch processing, recursive ZIP signing, multi-signature workflows, optional Trusted Timestamps (TSA), and offline verification using only embedded public keys.
Built for creators, developers, businesses, and organizations that require verifiable digital trust.
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Sign.Plus
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Sign.Plus is a legally-binding electronic signature solution, designed to make workflows faster for businesses of all sizes, from large enterprises to SMEs and even individuals.
Sign.Plus Features:
• Fill, sign, and send PDF documents, contracts, leases, NDAs, agreements, and more.
• Extremely easy-to-use eSignature solution available on multiple platforms, including web, mobile, Google Workspace, and more.
• Monitor the progress of your signature requests in real-time.
• Reusable templates to send out frequent documents to different recipients.
• Certificate of completion that contains a tamper-proof audit report with details about the signers.
• Set up a team and add your employees to your team.
• Compliant with electronic signature regulations such as ESIGN, eIDAS, ZertES, and more.
• Compliant with the world’s strictest data regulations such as ISO 27001, SOC2 Type 2.
• Data encryption in transit and at rest.
• Data residency
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PQC Imza
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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