# AttoTude

> AttoTude is a Menlo Park, California deep-tech startup building the world's first THz (terahertz) radio over wire - an interconnect platform that moves data between AI servers and GPUs at hundreds of gigabits per second over standard wire, without photonics or exotic packaging. Founded in 2024 by optical-networking veteran Dave Welch and RF/semiconductor pioneer Joy Laskar, the company adapts fiber-grade signaling to terahertz frequencies on low-cost ASICs to break the bandwidth, power, and reliability bottlenecks choking AI data centers. It came out of stealth at OFC 2025 and has raised roughly $91M total, including a $50M Series B led by Mayfield.

- **Founded:** 2024
- **Headquarters:** Menlo Park, California, United States
- **Founders:** Dave Welch (Co-Founder & CEO), Joy Laskar (Co-Founder & CTO)
- **Team size:** ~58 employees
- **Products:** AttoEngine, AttoWire, THz Radio Over Wire platform
- **Notable:** Emerged from stealth at OFC 2025 with the world's first THz radio over wire platform., Demonstrated 224 Gb/s transmission over four meters at 970 GHz, with projected viable reaches around 20-40 meters., Raised roughly $91M total, including a $50M Series B led by Mayfield in April 2025.

## Products & services

- **AttoEngine** — An ASIC engine adapted for terahertz frequencies, built on standard high-volume, low-cost ASIC manufacturing processes to generate and process THz signals.
- **AttoWire** — Wired THz interconnect that carries terahertz radio over a low-loss wire, enabling high-speed chip-to-chip and board-to-board links of up to roughly 40 meters without photonics or custom silicon packaging.
- **THz Radio Over Wire platform** — An end-to-end interconnect platform offering individual lane speeds from 112 Gb/s up to 448 Gb/s (448G PAM4) and beyond, operating at frequencies up to 1 THz for AI scale-up networking.

## Achievements

- Emerged from stealth at OFC 2025 with the world's first THz radio over wire platform.
- Demonstrated 224 Gb/s transmission over four meters at 970 GHz, with projected viable reaches around 20-40 meters.
- Raised roughly $91M total, including a $50M Series B led by Mayfield in April 2025.
- Achieves THz data rates without photonics or custom silicon packaging by using standard, high-volume ASIC manufacturing.
- Secured a development collaboration with Keysight Technologies (March 2026).

## Latest updates

- **2026-03** — Announced collaboration with Keysight Technologies on advanced signal analysis (UXR oscilloscope + 89600 VSA/FlexFrame) for THz interconnect development at up to 1 THz and 448G PAM4.
- **2025-04** — Closed $50M Series B led by Mayfield with The Westly Group and existing investors, bringing total funding to ~$91M.
- **2025-03** — Came out of stealth at OFC 2025, debuting THz radio over wire and demonstrating 224 Gb/s over four meters at 970 GHz.
- **2024-09** — Raised ~$29M Series A to revolutionize high-speed networking for AI and hyperscale data centers.

## Links

- Website: https://attotude.com
- LinkedIn: https://www.linkedin.com/company/attotude

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Profile page: https://yespress.io/attotude
Published by YesPress — https://yespress.io
Last updated: 2026-06-16