The D.1 was demonstrated in several countries. Yugoslavia purchased 79, Switzerland two, and Japan one. Italy purchased one, but then constructed 112 of their own version under the designation Ansaldo AC.2.
the first prototype with high set wing with no pylon or cabane struts;(one built).
Pre-series aircraft, some without pylon and some with pylon to D.1bis standard;(15 built).
Improved version with the wings raised 4.75 in (121 mm) on a short pylon: some pre-series and production aircraft were built to this standard, but most were built or modified to D.1ter standard.
The ultimate production standard D.1 with the wings supported on cabane struts in place of the pylon used on the D.1bis.
A high-altitude derivative of the D.1, fitted with an enlaged wing of wooden construction and a high compression Hispano-Suiza 8Fe engine. Submitted to the CEDANA (Commission dÉxamen des Appareils Nouveaux pour lÁeronautique) for the 1921 C1 fighter competition , the D.8 failed to attract an order due to the high altitude class specification being withdrawn. The sole D.8 went on to establish some closed circuit speed records in 1924;(one built).
The D.9 was derived from the D.1, for entry into the 1924 C1 fighter competition, by fitting a 313 kW (420 hp) Gnome-Rhône 9Ab (Jupiter IV) engine and later an enlarged wing. Unsuccessful in France, the D.9 had some export success with ten delivered to overseas customers and 150 built for the Swiss Fliegertruppe as the Ansaldo AC.3;(ten built).
The D.12 was developed in parallel to the D.9 for the 1923 C1 competition, powered by a 336 kW (450 hp) Lorraine-Dietrich 12E. Later fitted with a high compression engine the D.12 was unsuccessful in gaining a production contract;(two built).
The D.19 was another response to the 1923 C1 fighter competition, fitted with a 400 hp (298.3 kW) Hispano-Suiza 12Jb engine. Two prototypes took part in the competition and four more were delivered to Belgium and Switzerland;(six built).
In the latter half of 1925 the second prototype D.12 was re-engined with a 500 hp (372.8 kW) Hispano-Suiza 12Gb engine. Intended for export the D.21 garnered reasonable success acquiring orders for 34 plus licence manufacture of a further 64 in Czecho-Slovakia and Argentina;(100 built).
A single example of the D.1 assembled by Aeronautica Ansaldo SA prior to production of the modified AC.2 version;(1 built).