$ADA ADA currency is the native cryptocurrency of the Cardano blockchain, a project designed to provide a scalable and sustainable platform for smart contracts and decentralized applications (dApps). It was created by Charles Hoskinson, co-founder of Ethereum, and uses a consensus mechanism called Ouroboros, based on proof of stake (PoS), which makes it more energy efficient compared to Bitcoin or Ethereum (before its transition to Ethereum 2.0).