Aptos is a layer 1 blockchain designed to host smart contracts and operates on a Proof of Stake (PoS) consensus mechanism. Developed by former engineers from Diem, Facebook's failed attempt in the cryptocurrency world, Aptos reuses some technological innovations; the Move programming language, an advanced consensus method (AptosBFT), as well as "Block-Software Transactional Memory" (Block-STM), a technology that brings modularity and parallelization in the verification and validation of transactions.