"One problem that concerns many is the centralization of mining within the Bitcoin ecosystem. Fortunately, there are talented developers working to solve this problem and Matt Corallo, full-time Bitcoin developer at Chaincode Labs, is one of them. His BetterHash Mining Protocol is intended to significantly decrease the problems associated with mining pool centralization..."

https://bitcoinmagazine.com/articles/betterhash-protocol-lets-pool-miners-regain-control-over-their-hash-power/