Retym, a semiconductor company developing programmable coherent DSP (digital signal processing) solutions, has officially launched out of stealth, announcing over $180 million raised across multiple funding rounds. The latest, a $75 million Series D, was led by Spark Capital, with participation from Kleiner Perkins, Mayfield, and Fidelity Investments.
As part of the Series D, Spark Capital General Partner James Kuklinski joins Retym’s Board of Directors, signaling investor confidence in Retym’s strategic roadmap and technical vision.
The rise of AI workloads is placing massive demands on existing data center infrastructure—particularly in bandwidth and energy efficiency. Retym is stepping into this space with DSP technology designed to speed up and optimize data transmission within and between AI data centers.
"As AI workloads continue to scale exponentially, they're creating unprecedented demands on critical infrastructure,” said Spark Capital’s James Kuklinski. “Retym's exceptional team is uniquely positioned to address these challenges.”
According to the Dell’Oro Group, global annual spending on data center compute and networking could exceed $1 trillion within the next decade, highlighting the increasing importance of optical networking and DSP innovation.
The Series D capital will support Retym’s transition from development to full-scale production, enabling the company to meet growing market demand. Funds will also be used to advance the company’s multi-generation product roadmap, which aims to support future bandwidth and performance needs in AI ecosystems.
Co-founder and CEO Sachin Gandhi emphasized collaboration with ecosystem partners as a key part of Retym’s next phase: “We’re excited to collaborate with customers and ecosystem partners to integrate our DSPs into high-speed transceiver designs.”
Founded by a team of semiconductor veterans, Retym focuses on building programmable coherent DSPs for the next generation of data centers. These chips enable faster, more efficient communication between AI systems—solving bottlenecks that traditional infrastructure struggles with.
The company brings together top minds in analog, DSP, VLSI, and optical communications, aligning technical depth with strategic capital. Its name, pronounced “Re-Time,” reflects the company’s mission to reshape the timing and flow of data across complex infrastructure systems.
“As AI infrastructure demands intensify, Retym is well-positioned to lead in delivering cost-effective and power-efficient DSP innovation,” said Gandhi.
The Series D round was backed not only by Spark Capital, but also by long-time supporters Kleiner Perkins, Mayfield, and Fidelity—firms known for investing in transformative infrastructure companies.
“At Mayfield, we invest in exceptional innovators who create category-defining companies,” said Managing Partner Navin Chaddha. “We see tremendous opportunity in Retym's pioneering work on the next generation AI-driven interconnect technologies.”
Mamoon Hamid, Partner at Kleiner Perkins, added: “The quest for AI innovation is encountering constraints from current infrastructure technology... Retym’s visionary team is already tackling essential bottlenecks in AI infrastructure with a fresh approach.”
