About Retym
Retym designs digital signal processors for coherent optics, the laser links that carry data between data centers. Its chips are programmable and aimed at cloud and AI infrastructure, and the company positions itself as a neutral supplier to an open coherent optics ecosystem. It emerged from stealth on 31 March 2025 and says it has raised over $180 million. Retym is headquartered in Cupertino, California, with offices in Austin, Tel Aviv and Yerevan.
Retym was founded in 2021 and is based in Cupertino, CA, United States. It is listed under DSPs, AI Accelerators, Interconnect & Networking. Reported funding is $75M Series D / $180M total (March 2025, Spark Capital-led).
Compute Technologies
- DSPs
- AI Accelerators
What Retym works on
DSPs
A DSP, or digital signal processor, is a processor built to handle streams of real-world data such as audio, radio signals and sensor readings. It takes samples from an analog-to-digital converter and filters, compresses or analyses them in real time.
AI Accelerators
An AI accelerator is a chip, or a part of a chip, designed to run machine learning faster or with less energy than a general-purpose processor. The category includes GPUs, TPUs, neural processing units (NPUs) and chips from many startups.
Interconnect & Networking
Interconnect is the set of links that move data between chips, between boards and between racks. It includes wires on a package, cables inside a server, and the network switches and optical fibre across a data center. A processor is only as useful as the speed at which it can get data in and out.
