Adastamp vs HelloSign Comparison Table

Compliant with legal regulations and be accepted by courts With QES device used Yes
Integration with smart contracts Yes No
Signature visible in a document Yes(M2) Yes
Storage of documents Yes Yes
“Decentralized storage” Yes No
Sharing of documents Yes No
Notifications Yes Yes
Signing workflow Yes Yes
Document templates Yes No
Filling forms Yes No
Open-source solution Yes No
Long-term signatures Yes No

It is the most advanced solution that includes integration with Dropbox (and thus allows to store signed documents), visible signatures, signing workflow and document templates. So this solution exceeds AdaStamp functionality. However, it is a proprietary solution of one commercial vendor, not yet integrated with any blockchain (the vendor performs some research in this direction, but it is not yet integrated within the product).