Gimlet Labs on Friday announced a $300 million Series B led by Andreessen Horowitz, taking the San Francisco company's valuation to $3 billion.
Chief executive Zain Asgar said in a post on X that Sapphire Ventures joined as a major investor. A company blog post the same day listed other participants including Menlo Ventures, Arm, M12, Samsung Ventures and Tiger Global Management. A Gimlet release distributed through GlobeNewswire put total capital raised at $392 million.
The Series B follows an $80 million Series A that Gimlet announced on March 23, 2026, led by Menlo Ventures. Asgar said the company was started on the conviction that inference would become the dominant AI workload and that serving it would require infrastructure rebuilt from the ground up.
Gimlet describes itself as building a multi-silicon inference cloud. Asgar said the company combines GPUs, CPUs and purpose-built accelerators, then uses software to split AI workloads so each phase runs on the silicon best suited to it. The company said running a model across several kinds of accelerators can make it five to 10 times faster at the same power draw, or lift throughput by a similar amount without adding latency.
Asgar said Gimlet has signed billions of dollars in contracted revenue since March and is building toward hundreds of megawatts of capacity under management. The blog also cited gigawatts of datacenter pipeline. A March 2026 company statement, restated in Friday's release, said Gimlet had tripled its customer base and added one of the top three frontier labs and one of the top three hyperscalers.
Gimlet said it emerged from stealth in October 2025 and offers the software through its own managed cloud or as a managed service in customer environments. It said it is working with frontier labs and other large-scale inference users and is adding capacity for a broader audience. Asgar said the new funding will help the company build faster and serve more customers. The release said the capital will go toward expanding the multi-silicon cloud and the team.
Bloomberg, citing an interview with Asgar, reported that new investors include Arm Holdings and M12, Microsoft's venture fund, and that Gimlet is working with Arm to make its software compatible with Arm chip technology. The company, which is based in San Francisco and said it is primarily in-office, posted that it is hiring.
