Bi-folding gates consist of two gate panels that are hinged together. When activated, these gate panels fold back onto themselves to allow access. Most commonly, bi-folding gates are used in pairs, with one pair being used on each side of the gate opening. Some models require a track along either the top or bottom of the gate.

Bi-folding gates require only a small footprint and are often a good choice when space is limited. Many bi-folding gates have relatively fast opening and closing speeds. Because of the many potential entrapment points possible with this type of gate, additional safety considerations are often required.