British Gas and Scottish and Southern Energy have permanently ended the use of unsolicited doorstep sales of gas and electricity contracts.
They are the first of the major suppliers to stop the tactic entirely.
Pre-arranged appointments will replace unsolicited calls at the door.
A temporary halt to doorstep sales had been in place during staff consultations and remains for EDF Energy. Npower is reviewing its sales strategy.
"Since we announced a halt to unsolicited doorstep selling, feedback from our customers and staff has been very encouraging," said Ian Peters, energy managing director at British Gas.
"Many of our customers choose to do business over the telephone or online, but there is also still a very real demand for face-to-face energy advice among customers - as long as it is delivered at a time and place that is convenient for them."