aeternity

TON is a fully decentralized layer-1 blockchain designed by Telegram to onboard billions of users. It boasts ultra-fast transactions, tiny fees, easy-to-use apps, and is environmentally friendly. TON is scalable and shareable. Its flexible architecture lets it grow and grow, with no loss of performance. It's used for transaction fees, securing the blockchain through staking, deciding how the network develops, and settling payments. TON has plenty of unique features that differentiate it from other layer-1 blockchains. The actor model is a mathematical model of concurrent computation and is at the heart of TON smart contracts. In it, each smart contract can receive one message, change its own state or send one or several messages per unit time. As a result, the entire blockchain, as well as a given contract, can scale up to host an unlimited amount of users and transactions. The TON Virtual Machine (TVM) is a deterministic, fully-featured stack-based virtual machine.

Qtum is an open-sourced public blockchain platform, leveraging the security of UTXO while enabling multiple virtual machines including EVM. Qtum is PoS based and boasts a Decentralized Governance Protocol (DGP) allowing specific blockchain settings to be modified by making use of smart contracts. For instance, the block size of Qtum can be increased without the need for a hard fork. Qtum provides a standardized, stable, and safe development environment for smart contracts, enabling business-friendly smart contract coding, deploying, and executing. Qtum is also a decentralized application platform, compatible with existing blockchain infrastructure, and is modularized so new technology can always be added. There is a full spectrum of crypto wallets supporting Qtum, that meet the needs of different users. Qtum also provides mature development resources for blockchain and app development.