A Future Equity Agreement (SAFE) gives you the right to future shares in the company. If you invest, you're betting the company will be worth more than $20M eventually.
Airthium's technology is few weeks away from a critical prototype milestone. A successful development of their engine will lead to a massive decarbonization of industrial processes, thanks to what can be considered an innovative High Temperature Heat Pump. Further grid-scale storage applications can be foreseen when converting green ammonia back into power, when reverse operating the engine. One innovation for 2 markets, each with a huge potential to enable the energy transition.