Corrosion of metals in acidic environments poses a significant threat to industrial operations, particularly in the petroleum, chemical, and metallurgical sectors. In recent years, plant-based corrosion inhibitors have attracted increasing interest due to their eco-friendly, biodegradable, and cost-effective nature. This study presents a comparative analysis of the corrosion inhibition efficiency of leaf extracts from Ficus benghalensis, Trigonella foenum-graecum, and Psidium guajava on mild steel in 1 M hydrochloric acid (HCl) solution. The extracts were prepared using aqueous and alcoholic solvents, and their inhibitory actions were evaluated through weight loss measurements, electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy), and surface morphological studies using scanning electron microscopy (SEM). The results indicate that all three extracts exhibit promising inhibitory properties, with Ficus benghalensis showing the highest inhibition efficiency, followed by Psidium guajava and Trigonella foenum-graecum. The adsorption of phytochemicals onto the metal surface followed the Langmuir adsorption isotherm, suggesting a strong interaction between plant constituents and the metal surface. This study confirms the potential of these plant extracts as green corrosion inhibitors in acidic environments.