<p>Demand for sustainable energy systems has resulted in building interest for converting agricultural residues such as coffee husk and sugarcane bagasse into usable syngas through the biomass gasification. This is done by burning the biomass in limited air or other gas supply and converting it into a mixture of carbon monoxide, hydrogen, and methane. Hence, in this paper, performance of a throated updraft gasifier is analyzed by utilizing coffee husk and bagasse biomass feedstocks. As such, a detailed study on the thermodynamic equilibrium model and experimental analysis is performed. Syngas composition, lower heating value (LHV), gas yield, and cold gas efficiency (CGE), were predicted using a stoichiometric equilibrium model. Moreover, experimental analysis is performed for the analysis of syngas composition. Thus, for both feedstocks when equivalence ratio (ER) is increased the value of CO₂, N₂, and gas yield increases. Nevertheless, the value of CH₄, CO, H₂, and LHV, and CGE has decreases. Similarly, with increased moisture content (MC), the value of CO, N₂, CH₄, LHV, and CGE have fallen, however, the value of CO₂, H₂, and gas yield have increased. At optimum operating conditions corresponding to an ER of 0.30 and a MC of 12%, the syngas generated with coffee husk has a composition of 24.5% H₂, 26.0% CO, 8.75% CO₂, and 0.22% CH₄ in a wet basis, and LHV is determined to be 6.018&#xa0;MJ/Nm³. Whereas, bagasse has a composition of 23.5% H₂, 26.1% CO, 10.2% CO₂, and 0.15% CH₄ in a wet basis, and LHV is determined to be 5.923&#xa0;MJ/Nm³. Moreover, it has been shown that incorporating throat can reduce tar or char formation which in turn increases CO compositions in the producer gas.</p>