Alternatives

Products that do what Majik Signature does

Sign any file with post-quantum digital signatures

1. 1
   FIPSign▲1

   Post-quantum signing API · ML-DSA-65 (NIST FIPS 204)

   May 2026 · fipsign.dev

2. 2FI
   filippo.io/mlkem768 – Post-Quantum Cryptography for the Go Ecosystem▲315

   2024 · words.filippo.io

3. 3
   Qpher▲4

   Post-quantum encryption & signing — drop-in REST APIs

   Jun 2026 · qpher.ai

4. 4
   open-pdf-sign▲105

   Open-source tool for digitally signing PDFs

   2022

5. 5TP
   TutaCrypt, post-quantum encryption protocols for securing emails [pdf]▲15

   Hi HN, we are the developers from Tuta (formerly Tutanota), the German end-to-end encrypted email provider, and we recently released the world's first post-quantum encryption for email. We have included a full technical write-up of the cryptography involved in these changes and we have released it for open public review. This document specifies TutaCrypt, a protocol designed for hybrid email encryption in Tuta Mail. The protocol combines a classical Elliptic-Curve-Diffie-Hellman key exchange with a post-quantum KEM. The goal is to replace the usage of RSA in Tuta Mail. In the remainder of…

   2024 · tuta.com

6. 6
   QU3▲133

   Quantum-safe MCP servers for private, verifiable inference

   2025

7. 7FQ
   Free Quantum-Resistant Timestamping API (Dual-Signature and Bitcoin)▲5

   SasaSavic.ca recently launched a public cryptographic timestamping service designed to remain verifiable even in a post-quantum world. The platform uses SasaSavic Quantum Shield™, a dual-signature protocol combining classical and post-quantum security. Each submitted SHA-256 hash is: • Dual-signed with ECDSA P-256 and ML-DSA-65 (per NIST FIPS 204) • Anchored to the Bitcoin blockchain via OpenTimestamps • Recorded in a public, verifiable daily ledger API (beta, no auth required): https://sasasavic.ca/beta-api/ Example curl request: curl -X POST…

   Nov 2025

8. 8
   YubiKey 5Ci▲129

   Security key with dual support for USB-C and Lightning

   2019

9. 9
   Etch E-Sign Free▲90

   Simple, intuitive and binding e-signatures, absolutely free

   2021

10. 10
    WaveSign▲2

    Tamper-evident file authentication for images and PDFs

    Mar 2026

11. 11
    kysigned▲13

    E-sign documents by forwarding an email. $0.25.

    Jul 2026 · kysigned.com

12. 12
    Blocknify▲71

    Sign sensitive documents without sacrificing your privacy.

    2018

13. 13
    miPDFsign Cloud▲2

    The European, GDPR-first alternative to DocuSign

    Jul 2026 · cloud-signing.com

14. 14
    Qwiksi a CLI tool for adding your signature to a PDFs▲10

    A CLI tool for stamping a signature image onto a PDF - krisraven/qwiksi

    8d ago · github.com

15. 15
    H33.ai▲1

    H33-Post-Quantum FHE, ZKP & Biometric Auth API

    Mar 2026

16. 16
    Quantum-Lattice▲3

    Post - Quantum Blockchain (ML-DSA-65)

    Jul 2026 · quantum-lattice.futuristicai.co.za

17. 17
    PDFSign▲1

    Sign any PDF in 60 seconds. Offline. No Java. No plugins.

    May 2026 · pdfsign.in

18. 18
    Formaloo Sign - eSignature forms & docs▲26

    Customize free contract templates with secure eSignatures

    2024

19. 19
    PDF Verified▲3

    secure signature and stamp platform

    Jul 2026 · pdfverified.com

20. 20
    Sign PDF - Digital signature▲6

    Sign PDF documents with realistic hand-drawn signatures

    Mar 2026

21. 21FE
    Forward Email – Open-Source Quantum Safe Encrypted Email Service▲35

    2023 · forwardemail.net

22. 22
    ShieldFive▲4

    Zero-knowledge cloud storage, post-quantum by default

    Jun 2026 · shieldfive.com

23. 23
    AdmitiQ - signed, expiring tokens▲4

    Signed expiring QR tickets that can’t be forged

    Jul 2026 · admitiq.logiclitz.org

24. 24
    Contractso ▲17

    The Modern Standard for E-Signatures.

    Jan 2026

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