Sayyiduna Hudhaifah (may Allah be pleased with him) says that hypocrisy existed until the time of the Noble Prophet (peace and blessings of Allah be upon him) (because Allah would inform him that such and such a person is a hypocrite), but in this era, a person is either a believer or a disbeliever (because the state of the heart is known to Allah; now matters are based on what is apparent).