Retym

Retym (pronounced "Re-Time") is a Cupertino, California semiconductor company developing programmable coherent digital signal processing (DSP) solutions for cloud and AI infrastructure. Its technology is intended to enable faster and more efficient optical transmission both within and between AI data centers, addressing bandwidth, latency, power and scalability constraints created by growing AI workloads. The company describes itself as a neutral DSP provider aiming to support an open coherent optics ecosystem, and states it holds multiple patents covering analog design, error correction and equalization algorithms, alongside ADC/DAC design work.

Retym emerged from stealth on March 31, 2025, announcing more than $180 million raised across multiple rounds, including a $75 million Series D led by Spark Capital. At that time the company said it was charting a multi-generation product roadmap and would use the proceeds to scale to production and continue product development. Management has stated an intent to work with customers and ecosystem partners to integrate its DSPs into high-speed transceiver designs, with product announcements described as forthcoming.

The company is headquartered in Silicon Valley (10080 N Wolfe Road, Cupertino, CA) with additional offices in Austin, Tel Aviv and Yerevan, and describes its team as rapidly growing and drawn from analog, DSP, VLSI and optical communications backgrounds. One third-party profile places headcount in the 51-200 range.

Founding story

Retym was co-founded by Sachin Gandhi, who serves as CEO, and Dr. Roni (Aharon) El-Bahar, who serves as CTO, both with backgrounds in semiconductor design and optical communications. A third-party profile states the founders identified a shift in optical technology toward higher power, cost and performance efficiency and invested early in mixed-signal analog capability, high-performance DACs/ADCs and DSP algorithms. Sources disagree on the founding year: one third-party profile lists 2020 in its quick facts and 2021 in its narrative section.

Business model

Retym is a fabless-style semiconductor supplier that develops coherent DSP silicon and related analog/mixed-signal IP (ADC/DAC) intended for integration into high-speed optical transceiver designs by customers and ecosystem partners. Sources do not describe pricing or contract structures.

Sources do not disclose revenue or a specific revenue model; the company stated in March 2025 that Series D proceeds would support scaling to production, implying products were not yet in volume commercial sale at that point.

Traction

Publicly disclosed traction is primarily financial and organizational: over $180 million raised across multiple rounds through March 2025, participation from Kleiner Perkins, Mayfield, Fidelity Investments and Spark Capital, a stated multi-generation product roadmap, and offices in Cupertino, Austin, Tel Aviv and Yerevan with active hiring. No customers, revenue, shipments or product names are disclosed in the sources.

Latest developments

The most recent disclosed development is the March 31, 2025 stealth exit and Series D announcement, accompanied by the addition of James Kuklinski to the board and statements that the funding would support scaling to production and continued product development, with product announcements described as upcoming.