Vaire Computing built a resonator that recovers more energy than it costs to run.

MIT Tech Review profiles Vaire, cofounded by CTO Hannah Earley with Rodolfo Rosini and reversible-computing pioneer Michael Frank as senior scientist. Their chip's resonator recovered more energy than it lost even accounting for the power to drive it. The approach is reversible computing: keep information from intermediate steps instead of erasing it, so energy normally dumped as heat gets recycled. Over $12M raised, proof-of-concept stage, now working on folding the design into existing manufacturing flows. Outside experts say it needs a series of increasingly realistic demos before industry commits, and I'd hold that caveat firmly.