
OriginStamp
ScoreDetect
Woleet
Stampery
Bitstamped
Certificado
Proof of existence
Timestamp any document on Ethereum and get a certificate anyone can verify. The file is hashed in your browser and never uploaded — only the SHA-256 hash is recorded. No subscription and no crypto wallet.

StackMail
A self-hosted, unified webmail client. Connect multiple IMAP/SMTP accounts and manage them all in one clean interface.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | blockchainsign.io | mailflow.sh |
| Pricing | ||
| Listed in |
In their own words, as submitted to SaaSHub.


BlockchainSign is a blockchain timestamping service for people holding documents they cannot hand over. Conventional options all require custody: a copyright office wants a deposit copy, a notary wants to see the paper, an e-signature platform wants the file on its servers. BlockchainSign never...
No description of Mailflow.sh yet.
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using BlockchainSign and Mailflow.sh. For example, how are they different and which one is better?
When comparing BlockchainSign and Mailflow.sh, you can also consider the following products.

Blockchain-based, tamper-proof timestamping. Data Integrity as a Service.
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Stackmail is a webmail service whereby you can log in to your emails from any browser at any time!
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ScoreDetect is an innovative platform that serves as a permanence layer for data provenance, enabling systems and authorities to independently verify data authenticity.
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Blockchain timestamping and certification Software as a Service , SaaS.
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Stampery generates legally binding proofs of existence, integrity and ownership.
Compare Stampery to BlockchainSign or Mailflow.sh: