Celero Communications, a start-up based in Irvine, California, raised $140 million to accelerate development of its coherent DSP platform for AI infrastructure, securing a $100 million Series B led by CapitalG and an additional $40 million across earlier rounds led by Sutter Hill Ventures. The company aims to scale optical interconnect performance as AI clusters grow from single-rack systems to multi–data-center architectures. Celero plans to use the new capital to expand silicon development and commercialization of its next-generation coherent engines across hyperscale and cloud customers.
The company’s founders—veterans of Marvell, Inphi, Broadcom, and ClariPhy—are targeting the bandwidth and energy bottlenecks in AI interconnects as accelerator counts rise into the millions. Celero’s DSP architecture enables high-bandwidth coherent optics with power and cost efficiencies suited for large-scale AI training fabrics and long-reach data center links. Investors highlighted the team’s track record in shipping multiple generations of coherent DSPs and silicon photonics-related networking ICs.
The funding arrives as hyperscalers push toward multi-rack and multi-cluster AI supercomputers where traditional electrical and short-reach optical links face scaling limits. Coherent optics is emerging as a key technology for connecting high-capacity AI fabrics across buildings and campuses. Celero aims to position its DSP platform at this inflection point.
• $140 million total funding, including a $100 million Series B led by CapitalG
• Earlier $40 million in seed and Series A rounds led by Sutter Hill Ventures, with Valor, Atreides, Maverick Silicon and others participating
• Coherent DSPs designed for long-reach, high-bandwidth AI cluster and data center connectivity
• Targeting scaling limits in bandwidth, power efficiency, and cost in next-generation AI fabrics
• Founders previously led coherent DSP programs at Marvell, Inphi, Broadcom, and ClariPhy
“This investment underscores the confidence investors have in Celero’s mission to redefine how AI infrastructure connects and scales,” said Nariman Yousefi, co-founder and CEO of Celero.
🌐 Analysis
Celero’s raise reflects surging demand for coherent optical solutions as hyperscalers re-architect AI networks with higher-capacity, longer-reach links between GPU clusters. The company enters a competitive field that includes Marvell, Coherent Corp., Nokia, and emerging silicon photonics vendors, but its leadership team brings deep expertise in multi-generation coherent DSPs. CapitalG’s participation underscores growing interest from cloud-aligned investors in next-gen optical interconnect silicon.
Celero Communications, founded in 2024 and headquartered in Irvine, California, develops high-performance coherent DSP technology designed to scale optical interconnects for AI accelerator clusters and cloud data centers. Led by co-founders Nariman Yousefi and Oscar Agazzi—veterans of Marvell, Broadcom and ClariPhy—the company focuses on advanced coherent-signal processing architectures that deliver high bandwidth, power efficiency and cost-effective links for next-generation AI infrastructure.
