Zcash

Zcash was built on the original Bitcoin code base to provide a secure means of buying goods and services and exchanging currencies, including crypto and fiat.

Networks Mainnet, Testnet
Released 2016
Consensus Proof of Work (PoW)
Smart contracts No
Block time 75 seconds
Smart contract language(s) supported No
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Privacy-protecting digital currency

Zcash provides users with the strongest privacy available for any digital currency. It uses shielded transactions, ensuring transactions remain completely private and confidential while allowing people to transact efficiently and safely with low fees.