Haven is developing a blockchain-based ecosystem of multiple decentralized coins. The Haven protocol places an emphasis on privacy and price-stability, and like Monero, is based on the CryptoNote protocol. Haven has a Proof-of-Work (PoW) consensus mechanism that is AISC-resistant, and has a dynamic block size. The platform is powered by the XHV coin.

Stealth is a cryptocurrency focused on privacy and and speed. The Stealth blockchain has a Quantum Proof-of-Stake (qPoS) consensus mechanism that is designed to enable almost instant transactions with improved privacy. Validators on the network are assigned a short quantum of time to validate transactions. The protocol combines two types of blockchain ledgers, for different types of transactions, to improve validation speeds on their platform. The network is powered by the XST coin.

PIVX is a cryptocurrency that is focused on privacy, speed, and low transaction fees. It was originally called Darknet and was forked from DASH. PIVX has a strong focus on community governance.
PIVX (Private Instant Verified Transaction) uses a privacy-centric Proof-of-Stake consensus protocol that allows anonymous staking.