Retym has raised $75.0M in total across 1 funding round.
Retym's investors include Adverb Ventures, AirAngels, AngelCube, ATX Venture Partners, Canaan Partners, Celesta, CP Ventures, Forerunner Ventures, Foundation Capital, Greylock, Inspired Capital, Kleiner Perkins.
Retym is a semiconductor company specializing in programmable coherent digital signal processing (DSP) solutions for AI infrastructure and cloud connectivity.[1][2][4] Founded in 2021 and headquartered in Cupertino, California, with offices in Austin, Tel Aviv, and Yerevan, Retym develops low-power, interoperable, and compact optical networking technologies that integrate DSP, analog design (including DAC/ADC), deep learning, and AI to optimize performance in data centers and telecommunications.[1][2][3] The company emerged from stealth in 2025 after raising over $180 million, including a $75 million Series D led by Spark Capital, targeting efficient transmission within and between AI data centers.[1] Retym serves cloud providers and AI operators by solving bandwidth bottlenecks, reducing latency, and enabling scalable optics through an open, neutral DSP ecosystem.[2][3]
Retym was founded in 2021 by Dr. Roni (Aharon) El-Bahar (CTO) and Sachin, two experts in optical communications driven by a vision to innovate in coherent DSP amid evolving data demands.[3] Recognizing a pivotal shift in optical tech—pressures for higher efficiency in power, cost, and performance—they invested early in mixed-signal analog capabilities, high-performance DACs/ADCs, and advanced DSP algorithms.[1][3] From humble beginnings, the duo built a rapidly growing team of top talent in analog, DSP, VLSI, and optical comms, fostering a collaborative culture.[2][3] Pivotal traction came with strategic partnerships and over $180 million in funding, culminating in their 2025 stealth exit amid the AI boom they anticipated.[1][3]
Retym rides the explosive AI infrastructure wave, where surging data demands for training massive models strain traditional networking, necessitating efficient optical transmission between data centers.[1][3] Timing is ideal post-2021 founding, aligning with AI boom acceleration and hyperscaler needs for 1.6T+ coherent optics.[3] Market forces like power constraints, bandwidth explosion, and open ecosystems favor Retym's neutral, programmable DSP over proprietary incumbents, enabling cloud giants to scale AI without vendor lock-in.[2][4] By partnering with leaders and standardizing tech, Retym influences the ecosystem toward collaborative, efficient photonics, competing with firms like Lightmatter in silicon photonics while advancing DSP as foundational AI plumbing.[1]
Retym's momentum—fresh funding, stealth exit, and patented tech—positions it to capture share in the $10B+ coherent DSP market as AI clusters demand 800G/1.6T interconnects.[1] Next steps likely include product launches, deeper hyperscaler integrations, and global expansion via its multi-office footprint.[2][3] Trends like edge AI, 6G telecom, and energy-efficient computing will propel growth, with Retym's open model amplifying influence amid ecosystem shifts. As AI infrastructure scales, Retym could redefine optical networking, empowering the connectivity backbone that founded visionaries like its co-founders first foresaw.[3]
Retym has raised $75.0M across 1 funding round. Most recently, it raised $75.0M Series D in March 2025.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Mar 1, 2025 | $75.0M Series D | Adverb Ventures, AirAngels, AngelCube, ATX Venture Partners, Canaan Partners, Celesta, CP Ventures, Forerunner Ventures, Foundation Capital, Greylock, Inspired Capital, Kleiner Perkins, Klossy, Mayfield, NewView Capital, Offline Ventures, Otherwise Fund, Pantera Capital, Pioneer Fund, RevTech Ventures, Snowflake Ventures, Sound Ventures, Spark Capital, Stage 2 Capital, Torch Capital, Upfront Ventures, Walden International, Evan Williams, Jared Sleeper, Jeffrey Wilke, Jonathan Widawski, Marissa Mayer, Mathilde Collin |
