Decart raised $300 million in a new funding round.
The investment increases the software startup's valuation to nearly $4 billion.
The company was previously valued at $3.1 billion.
This follows a $153 million fundraising round in August 2025.
Radical Ventures led the new round.
Chipmaker Nvidia participated as a new strategic investor.
Decart’s technology allows AI developers to switch between processors from Nvidia, Google, and Amazon.
The software helps companies avoid being locked into a single hardware provider.
The investment underscores demand for foundational tools that make AI development cost-effective.