Axens is playing a leading role in the development of technologies for sustainable aviation fuel (SAF), which is considered a crucial alternative to fossil jet fuel for the aviation sector's decarbonization strategy. SAF can be derived from renewable or waste-based resources, with the help of low-carbon hydrogen produced using renewable or low-carbon electricity. SAF is a drop-in fuel that can seamlessly fit into existing aviation infrastructure, providing an immediate solution for reducing emissions without the need for major equipment or infrastructure changes. The production of SAF involves various pathways that are customized based on specific feedstocks, local conditions, and regulatory environments. Central to these production pathways is the use of low-carbon hydrogen, which not only facilitates essential chemical reactions but also contributes to cost reduction and carbon emission mitigation. The article discusses three key SAF production processes, highlighting the role of hydrogen in each, and examines how evolving regulations and cost dynamics influence their competitiveness. Overall, Axens' focus on sustainable aviation fuel technologies, leveraging low-carbon hydrogen, represents a positive step towards achieving a more environmentally friendly aviation industry.