The crystallization of InSe from bulk amorphous indium-selenium alloys was studied as a function of composition. The composition dependence of the nucleation energy of InSe from amorphous alloys was determined using a Kissinger analysis of differential scanning calorimetry data. A minimum in the nucleation energy was found for the one-to-one composition. This minimum reflects the maximum driving force per unit volume found for this composition as well as the lack of short-range composition fluctuations required to nucleate stoichiometric InSe from nonstoichiometric amorphous alloys.