Vertcoin is an open-source payment protocol similar to Bitcoin that optimizes for GPU miners.
Vertcoin was created in 2014 as an alternative Proof-of-Work (PoW) blockchain that optimized for allowing and protecting GPU mining. The Vertcoin team build and deployed the protocol in response to seemingly increasing mining centralization in lager PoW like Bitcoin. "ASIC resistance" is the main feature, value, and goal of Vertcoin developers.