Cyberark [1] and delinea [2] are definitely leading enterprise solution right now. Okta too has an offering in this space but I haven't seen it used widely yet.
But there are quite some solutions in market at this point that are in growing trend. You would find teleport [3], strongdm [4] in high growth companies where as Adaptive.live [5], Idemium.io [6] and now hoop.dev in the early stage to series B.