Amazon joins as a strategic customer as Decart expands its real-time AI infrastructure and world-model platform.

Artificial intelligence company Decart has raised $300 million at an estimated valuation of $4 billion, adding some of the world’s largest technology companies as both customers and investors.

The funding round was led by Radical Ventures and included participation from chip giant NVIDIA. Additional investors included eBay Ventures, Adobe Ventures, Toyota Ventures, Atreides Management, and Valor Equity Partners, alongside existing investors Sequoia Capital, Zeev Ventures, and Benchmark.

Private investors in the round include Andrej Karpathy, co-founder of OpenAI, former CEO of Walt Disney Michael Eisner, members of the Nintendo founding family, and gaming investor Moritz Baier-Lentz.