
The CANT 25 was an Italian shipboard single-seat biplane flying boat fighter that entered service with the Regia Aeronautica in 1931.

The Caproni Ca.70 was a two-seat night fighter and ground attack biplane produced in Italy in 1925. It was the only Italian aircraft designed from the outset as a night fighter.

The Caproni Ca.71, originally Ca.70L, was a two-seat biplane night fighter produced in Italy in 1927. It was derived from the Caproni Ca.70 of 1925.

The Fiat CR.1 was an Italian biplane fighter aircraft of the 1920s. Of wood-and-fabric construction, it was designed by Celestino Rosatelli, from whom it gained the 'CR' designation. Its most distinctive feature was that the lower wings were longer than the upper ones.

The Fiat CR.20 was an Italian biplane fighter used during the 1920s and 1930s. Designed by Celestino Rosatelli, it represented an intermediate step from the early biplane CR.1 and the later, successful series CR.30, CR.32 and CR.42.

The Gabardini G.9 was an Italian single-seat biplane fighter prototype produced by Gabardini in 1923.

The Macchi M.26 was an Italian flying boat fighter prototype of 1924 designed and manufactured by Macchi.

The Macchi M.41 was an Italian flying boat fighter prototype of 1927 designed and manufactured by Macchi. Its production model, the M.41bis, first flown in 1929, was in front line service from 1930 to 1938.

The Piaggio P.2 was an Italian fighter prototype of advanced design built by Piaggio in 1923.

The SIAI S.52 was an Italian fighter prototype of 1924.

The SIAI S.58 or Savoia-Marchetti S.M.58 was an Italian flying boat fighter prototype of the 1920s designed and manufactured by SIAI.