Equihash is a popular Proof-of-Work mining algorithm announced in 2016. The main goal of its developers was to get rid of ASICs in the network, as they threaten decentralization because of the high concentration of computing power. Together with Ethash algorithm Equihash was a driver of the GPU mining community. The most popular coins on this algorithm are Zcash, Horizen and Komodo. Moreover, Equihash has set the stage for new algorithms, like Equi 125_4, 144_5, 192_7, etc.
In 2018 a lot of companies have released ASIC miners for Equihash including Bitmain and Inosilicon. At the moment there are no graphics cards on Equihash as it is not profitable at all. We recommend using only ASIC devices for Equihash mining.