Well interventions represent one of the main operational expenditure (OPEX) in the O&G industry, especially in offshore fields. Historically, high cost of semi submersible rigs or drillships and long time to acomplish them have restricted the offshore well interventions. Based on this, the O&G industry has developed technologies in order to perform offshore well interventions in an economically viable way. Riserless well intervention (RLWI), intelligent completion (IC) and intervention robot (IR) are relatively new technologies and recently gained importance in the O&G industry. Therefore, this paper details the operations and values of IC, RLWI, and IR technologies. Moreover, we analyze and compare those technologies, confronting them against the known production loss problems that require well intervention. The objective is indicating which technologies are feasiable for the future well intervention on subsea wells.