ESOP (Employee Stock Option Plan)

HI,

Does anyone know of any ESOP Dapps? ESOP are an employee equity incentive plan that grants options to purchase future shares of an organization at a guaranteed price per share.

Did anyone attempt building such a contract? They will usually have a nominal value per share, guaranteed PPS (price per share), vesting schedules, grant exercise options (such as cashless exercise), expiration date, and a bunch of other restrictions and clauses..

Apart from an ESOP specific dapp, does any DAO incorporate such a mechanism within it?

Thanks!