Alternatives

Products that do what Akashi Notari does

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

1. 1
   SBIX Certify▲13

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

   Dec 2025 · certify.sbix.io

2. 2
   Claimby▲107

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

   2018

3. 3
   TimeSeal▲116

   Restoring digital trust, one blockchain timestamp at a time

   2023

4. 4BT
   btproof - trusted timestamping on the Bitcoin blockchain▲75

   2013 · btproof.com

5. 5
   yousaidthat.org▲63

   Prove that you said things before anyone else

   Jun 2026 · yousaidthat.org

6. 6
   TransferChain Send▲591

   Blockchain-based secure & private file sharing for everyone

   2023

7. 7
   TimeProof▲5

   Prove it existed. Permanently.

   Jan 2026

8. 8
   Proof.ink▲100

   Proven immutable data stored on the Steem blockchain

   2019

9. 9
   TimeBinder

   Prove your files existed before AI could rewrite them

   Mar 2026 · timebinder.io

10. 10
    Notarize Anchor Doc Services Testatur▲1

    Verifiable proof of document existence on blockchain.

    Mar 2026 · notarize.anchordocservices.com

11. 11SV
    Seal – Verifiable timestamp for your private ideas▲113

    2022 · docs.planet.ink

12. 12
    TxHash Blockchain as a Service▲120

    Cryptocurrency and smart contract event notifications

    2018

13. 13
    DocProof▲2

    Cryptographic timestamps for documents — no file storage

    Jul 2026 · docproof.app

14. 14
    Create My Token▲98

    Make ERC/BEP-20 Token, in 5 minutes with No-Code, no login

    2021

15. 15
    Remote Online Notarization▲118

    Notarize documents securely online in 10 minutes

    2024

16. 16
    Proof Of Time Travel▲87

    Using blockchain to prove time travel

    2018

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

    2018 · cryptoproof.org

18. 18
    Aluchin▲2

    Tamper-proof document verification on the blockchain

    Feb 2026 · aluchin.com

19. 19DN
    DocStamp – Notarize documents on the Ethereum blockchain▲8

    2017 · docstamp.io

20. 20
    BlockFact▲5

    Tamper-proof photos in 5 seconds—from capture to blockchain

    May 2026 · blockfact.io

21. 21IM
    I made a new kind of Trusted Timestamp based on plaintext encoding▲5

    I've just launched a new site that creates Trusted Timestamps. Anyone can use it to make any data immutable going forward in time. By "verifying" a Trusted Timestamp against a file, you certify that file has not been altered since the time the Trusted Timestamp was created at. Trusted Timestamps are not a new idea, there is a standard defined in RFC3161 and some other prior work as well. My design though is different as it is based on plain-text, human readable files. I believe this makes this form of Trusted Timestamp more accessible for a wider set of applications. I found the RFC3161…

    2024 · timestampit.com

22. 22BC
    Bitcoinproof - Create a forgery-proof timestamp for your data▲8

    2013 · vog.github.io

23. 23
    Proxae▲2

    Timestamp a text, idea, or file in the blockchain

    May 2026 · proxae.com

24. 24
    docuProof — Blockchain-Anchored Proof

    Your file's alibi. Timestamped proof of any file, forever.

    Mar 2026 · docuproof.io

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