TypeSafe AI, a startup developing AI models that help software make decisions, has reportedly raised about $870 million at a $7.5 billion valuation.
Andreessen Horowitz (a16z) led the round, with Sequoia Capital and several angel investors also participating, Bloomberg reported Friday. As part of the deal, a16z general partner Martin Casado will join TypeSafe's board.
The round comes only three weeks after TypeSafe emerged from stealth with $40 million in seed funding led by DCVC. The two rounds take its total funding to about $910 million.
Founded in 2024 by Diogo Almeida, Erik Gafni and Sasha Sheng, TypeSafe develops AI models designed to work directly inside software.
Jev, its first public model, launched last month. It looks at information and returns answers that software can directly use, such as yes or no, a score or a choice from a list.
"Jev is TypeSafe's flagship model and the first System One model. System One models are built to make fast, structured decisions that software can use directly," the startup says on its website. "Jev evaluates typed questions against a state and returns structured results directly. No text generation, no parsing."
TypeSafe said Jev also provides a confidence score with some answers, helping software decide whether to act on the result or send it for further review.
TypeSafe says Jev is faster, cheaper and more reliable than using a large language model for the same work. The model surpassed one million users within days of its launch and is now used by about a third of Fortune 500 companies, TypeSafe told Bloomberg. It did not identify any of those customers.
TypeSafe also said Jev processes trillions of tokens each day. The startup declined to disclose its revenue, though Almeida told Bloomberg that the model is profitable.
Almeida previously worked at OpenAI and Google Brain. TypeSafe's wider team includes former employees of OpenAI, Meta, Google, Stripe and other technology companies.
TypeSafe reportedly has just over 20 employees. It plans to use the fresh capital to hire more people, secure additional computing capacity and make Jev available to more customers.
A16z was also an early investor in AI coding startup Cursor. Elon Musk's SpaceX acquired Cursor in August in a deal with an implied equity value of $60 billion, according to a regulatory filing.
A16z's Casado compared TypeSafe with Cursor, telling Bloomberg that Cursor helped developers produce more software, while TypeSafe is trying to help them build better software at a lower cost.