Gimlet Labs Raises $300M Series B at $3B Valuation

Gimlet Labs raised $300 million in a Series B round led by Andreessen Horowitz, the company said in a blog post on Sept. 4, 2026, valuing the five-year-old infrastructure startup at $3 billion. Arm and M12, Microsoft's venture arm, joined as new investors alongside returning backers Menlo Ventures, Eclipse and Factory.

The figure is the company's own, written plainly into the announcement rather than surfacing through a leak or a filing. It brings Gimlet's total funding to $392 million in five years, and the round is the largest single check the company has taken.

How the $300 million breaks down

Gimlet was founded in 2021 by Zain Asgar, Michelle Nguyen, Omid Azizi, Natalie Serrino and James Bartlett, who had previously built Pixie, an open-source Kubernetes observability tool that New Relic acquired in 2020. The seed round raised $12 million from Factory and a group of angel investors that included Intel Chief Executive Lip-Bu Tan, Figma Chief Executive Dylan Field and Andreessen Horowitz general partner Raghu Raghuram, according to TechFundingNews, which reviewed the company's funding history.

Round	Amount raised	Lead investor	Running total
Seed	$12 million	Factory	$12 million
Series A	$80 million	Menlo Ventures	$92 million
Series B	$300 million	Andreessen Horowitz	$392 million

The Series A closed at $80 million, meaning the Series B alone is more than three and a half times everything Gimlet had raised before it. That is a steep step up even by the standards of the AI infrastructure rounds closed in 2026, on the order of the jump Temporal made in its own Series E.

What the multisilicon cloud actually does

Gimlet's product, Gimlet Cloud, splits an AI inference request into stages and routes each one to whichever chip handles it best, spanning processors from Nvidia, AMD, Intel, Arm, Cerebras and d-Matrix rather than committing a customer's workload to a single vendor's hardware. The company says this disaggregation delivers three-to-ten-times inference speed improvements for the same cost and power envelope compared with a single-chip setup, a comparison it has published but that no outside party has verified.

Gimlet said it has added billions of dollars in contracted revenue since March 2026 and is scaling toward hundreds of megawatts of managed capacity on top of what it called gigawatts of data-center pipeline. The announcement does not give a dollar figure for that revenue. It is precise about the $300 million it took in and vague about the money it says is coming in, which is the one number in the post that Gimlet chose not to sharpen.

Where $3 billion sits next to Groq and Cerebras

Gimlet's $3 billion valuation sits below Groq, the chip maker last valued near $3.5 billion, and far below Cerebras, which is now a public company after a Nasdaq debut that pushed its market value past $56 billion, according to TechFundingNews. Cerebras took the IPO route in 2026 rather than the private-round path EigenQ chose on its way to a SPAC merger, and Gimlet has given no indication it plans to follow either.

Gimlet's pitch is that it does not need to pick a side in the chip war those two companies are fighting from opposite ends, since its software runs on top of all of them. Whether that neutrality holds up once one chip vendor starts steering more of Gimlet's own funding is the open question the announcement does not address. The next test is whether the company discloses an actual revenue number, rather than a unit of currency, when it raises again.