Forbes January 21, 2026
The startup behind open source tool PyTorch Lightning has merged with compute provider Voltage Park to create a “full stack AI cloud” to serve corporates and startups like Cursor.
Lightning AI founder and CEO William Falcon began renting AI chips from data center provider Voltage Park last March to help his clients train and finetune AI models. Less than a year later, his Nvidia-backed startup is merging with the AI factory, which manages over 35,000 Nvidia GPUs.
Falcon said that the merged company, to be called Lightning AI, was valued at over $2.5 billion and that it had over $500 million of annual recurring revenue, which includes GPU rentals booked through Voltage Park.
Lightning had grown from building a popular...
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