Decred.

Decred combines Proof-of-Work and Proof-of-Stake consensus mechanisms into a hybrid system to ensure decentralized security. It leverages on-chain governance through Politeia, allowing stakeholders to vote on protocol upgrades and treasury spending.

The mature, battle-tested governance model provides a robust mechanism for long-term sustainability and protocol evolution.

The project has struggled to capture significant market share or retail attention compared to newer, faster blockchains.