Systems and processes for producing syngas are provided. A first hydrocarbon can be partially oxidized in the presence of an oxidant and one or more first catalysts at conditions sufficient to partially combust a portion of the first hydrocarbon to provide carbon dioxide, non-combusted first hydrocarbon, and heat. At least a portion of the non-combusted first hydrocarbon can be reformed in the presence of at least a portion of the heat generated in the partial oxidation step and the one or more first catalysts to provide a first syngas. The first syngas can comprise hydrogen, carbon monoxide, and carbon dioxide. Heat can be indirectly exchanged from the first syngas to a second hydrocarbon to reform at least a portion of the second hydrocarbon in the presence of steam and one or more second catalysts to provide a second syngas. The second syngas can comprise hydrogen, carbon monoxide, and carbon dioxide.