There are many different companies and organizations working to revolutionize the way we fly by developing alternatives that don’t rely upon fossil fuels. This page provides an overview of the most important projects currently underway and categorizes them in a few broad groups: medium to long range airliners, regional airliners, air taxis, general aviation and technology providers.

The focus is on aircraft that use little to no fossil fuel. Some aircraft listed here still use some amount of conventional or bio-fuel, but have managed to reduce it to a minimum which still makes them worth calling out. Further, some exceptions may be made for aircraft where fossil fuel use may be optional. Not every single company or project is included either. Many developments never make it beyond a concept on paper. To be included here, the company or project needs to show signs of having moved beyond that.