Rapid industry growth will drive global aviation CO<sub>2</sub> emissions up from 0.6 billion tons (GT) in 2015 to 2.1 GT in 2050. Yet the aviation industry is committed to a 50% reduction in CO<sub>2</sub> emissions in 2050 compared to 2005. The industry must turn to biojet fuel, which will play the largest role in achieving this ambitious goal. Currently, four different pathways are certified for commercial use – some promising, others less so. Four more pathways are under development and quickly emerging, though they also must overcome hurdles to reach commercial success. In this report, we examine 15 biojet fuel companies utilizing a wide range of feedstocks and conversion technologies and identify the near-, mid-, and long-term winners capable of delivering truly cost-competitive biojet fuel to a fuel-hungry industry.