Bi-reforming of methane or biogas technology is comprehensively reviewed and compared with other conventional reforming processes, namely, partial oxidation and steam or dry reforming of methane in this chapter. Apart from studying thermodynamic aspects to determine reactant conversions, H2/CO molar ratio, and coke selectivity at various reaction temperatures and initial mixtures of reactants, the influence of process variables on catalytic performance are thoroughly examined. The recent advancement in catalyst design via implementation of support and promoter types for methane bi-reforming and kinetic modeling are also reviewed in detail.