The integration of chiral molecules into hybrid organic-inorganic metal halides (HOIMHs) has opened new frontiers in many application contexts such as optoelectronics, photovoltaics, and nonlinear optics. Intriguing chiroptical and spin phenomena including circular dichroism (CD), circularly polarized luminescence (CPL), second-harmonic generation (SHG), and chirality-induced spin selectivity (CISS) have been extensively studied in the last few years, together with investigations on their piezoelectric properties and dielectric characteristics. Moreover, the intrinsic noncentrosymmetry has demonstrated to be beneficial for the generation and transport of the photogenerated carriers, allowing for improvements in photovoltaic and photocatalysis. One of the key challenges in this research field is the urgent need to replace toxic lead with more environmentally friendly metals, sparking a rapid and continuous emergence of promising alternatives. This chapter explores recent advancements in chiral lead-free hybrid metal halides, with a particular emphasis on the applications promising in optimizing solar energy harnessing and sustainable energy conversion.