San Francisco – October 28, 2026 -- Plato, a startup that builds simulated workplaces for training AI models, raised a $16 million Series A round led by Nava Ventures, lifting its total funding to $19 million.

Gradient Ventures, Transpose Platform and Microsoft AI CEO Mustafa Suleyman also participated. Gradient Ventures had led the company's earlier seed round. Nava Ventures founder Freddie Martignetti joins Plato's board.