Monero (XMR)

Monero enables untraceable and unlinkable transactions. It uses Ring signatures to protect sender identity, stealth address to protect recipient identity and Ring CT (Ring confidential transaction) to protect transaction amount. This is vastly different from Bitcoin where all transactions are visible to everyone and a sophisticated blockchain analysis can potentially reveal a user's identity. In April 2018, Monero made an effort (successful so far) to become ASIC resistance, in order to prevent mining centralization. Monero's privacy feature makes a true fungible coin. It also supports the concept of 'view key'. Using a 'view key' a user can share transaction details with a third party or an auditor. No one can spend coins using 'view key'.