Alternatives

Products that do what SBIX Certify does

✨ Instant legal proof-of-existence for any document.

1. 1
   TimeProof▲5

   Prove it existed. Permanently.

   Jan 2026

2. 2
   Akashi Notari▲3

   Prove any file existed. On-chain timestamp. In 60 seconds.

   Nov 2025

3. 3
   DocProof▲2

   Cryptographic timestamps for documents — no file storage

   Jul 2026 · docproof.app

4. 4
   Proof.ink▲100

   Proven immutable data stored on the Steem blockchain

   2019

5. 5BT
   btproof - trusted timestamping on the Bitcoin blockchain▲75

   2013 · btproof.com

6. 6
   Bitproof▲113

   True certification in the bitcoin blockchain

   2015

7. 7
   TimeSeal▲116

   Restoring digital trust, one blockchain timestamp at a time

   2023

8. 8
   Claimby▲107

   Free legally-valid timestamps for your files, ideas & art.

   2018

9. 9SV
   Seal – Verifiable timestamp for your private ideas▲113

   2022 · docs.planet.ink

10. 10
    Zombie Delete▲89

    Docusign for provable deletion - anywhere, everywhere.

    Apr 2026 · zombiedelete.com

11. 11
    yousaidthat.org▲63

    Prove that you said things before anyone else

    Jun 2026 · yousaidthat.org

12. 12
    Blocknify▲71

    Sign sensitive documents without sacrificing your privacy.

    2018

13. 13
    0xcert▲123

    Your ID, degree or house. 0xcert-ified on the blockchain

    2018

14. 14
    Woleet▲73

    Bitcoin-anchored proof that documents are authentic

    May 2026 · woleet.io

15. 15
    Let's Seal – Let's Encrypt for document signing, free and self-hosted▲94

    TLDR, Let's Seal gives the finger to Adobe and every doc signing tool (docusign, google, etc) who pay to play with the Adobe Approved Trust List and then charge you for something that should be free. Currently even the person checking if a document/contract is sealed or code is authentic has to also be inside the same Adobe walled garden too. Verification, the part that should be free is the part everyone charges for. Thats the shape Let's Encrypt fixed for TLS, and I wanted the same thing for documents and files. The core idea therefore needed to go a bit beyond e signatures and i…

    Jul 2026 · github.com

16. 16
    Blockusign▲93

    Secure Document Signing & Verification Powered by Blockchain

    2018

17. 17CP
    CryptoProof – post proofs to the Ethereum blockchain for free▲55

    2018 · cryptoproof.org

18. 18
    TimeBinder

    Prove your files existed before AI could rewrite them

    Mar 2026 · timebinder.io

19. 19BC
    Bitcoinproof - Create a forgery-proof timestamp for your data▲8

    2013 · vog.github.io

20. 20
    TransactProof▲3

    From tx-hash to PDF proof — instantly.

    Nov 2025 · app.transactproof.com

21. 21BA
    Blocksign, a Bitcoin service for legally signing any document▲17

    2014 · blocksignit.com

22. 22
    CBX▲2

    The Future of Digital Evidence

    Feb 2026 · cbx.app

23. 23
    Notarize Anchor Doc Services Testatur▲1

    Verifiable proof of document existence on blockchain.

    Mar 2026 · notarize.anchordocservices.com

24. 24SW
    Signed Work – NFTs, without a blockchain▲33

    2021 · signed.work

Ranked by how close each launch is in meaning, then by votes. Refine with a description →