Dero is developing a Proof-of-Work (PoW) blockchain with a DAG block structure. Their goal is to enable anonymous and fast transactions, with a high degree of encryption. The platform will also have smart contract functionalities.

Horizen, formerly called ZenCash, is a cryptocurrency focused on privacy. Horizen has an end-to-end-encryption system with zero-knowledge technology, that allows for anonymous transactions and messaging.
The company suffered a 51% attack in June, 2018 and has since re-branded as Horizen. Horizen hopes to combine anonymous transactions and messaging with an emphasis on community governance.

Spectrecoin is a privacy-focused cryptocurrency with a Proof-of-Stake (PoS) consensus mechanism. Spectrecoin uses ring signatures, stealth addresses, and Tor to provide privacy and anonymity.