Celero raises $275M at $3B for the networking silicon inside AI clusters

The round closed September 8 and lifts total funding to $415M. Sutter Hill Ventures and Maverick Silicon, both existing backers, also took part. Atreides managing partner Gavin Baker joins the board. Celero is based in Irvine, California, and was founded in 2024. It started with an $8M seed round that April. The new money goes toward the product roadmap, R&D and production readiness. The raise follows internal validation of what Celero calls the first coherent DSP built on a 2nm process. The chip is designed to support optical links from 1.6T up to 3.2T. Independent benchmarks have not been published. Celero has also not started production or named customers. CapitalG's role is notable because Alphabet's Google is a major customer of Marvell, one of the incumbents in this segment. For AI builders, the bottleneck is moving from compute to the links between chips, racks and buildings. A $3B valuation with no shipping product shows investors are pricing in a supply response to that constraint. The practical effect would come only if Celero reaches production and wins hyperscaler design slots. Until then, teams planning capacity should treat it as a future option, not a supply source.