Untether AI's energy-efficient chip bet: AMD acquihire, then 2025 bankruptcy

Untether AI designed AI inference accelerators using an in-memory compute architecture that promised much lower power and higher speed than Nvidia GPUs, selling chips such as the speedAI240 for edge and data-center workloads.

That 'energy-centric' in-memory AI inference chips — faster and cooler than Nvidia GPUs — would win a market from edge to data center without Nvidia-scale investment.

$152M USD (~$208M CAD) raised over its lifetime, including a $125M round led by Intel Capital in July 2021

Founded in Toronto in 2018 by Martin Snelgrove, Darrick Wiebe and Raymond Chik, Untether AI built AI inference chips around an in-memory computing architecture that combined memory and compute in one package to cut power and latency. The pitch won big backers early: a $125M USD round led by Intel Capital in July 2021, with Radical Ventures, CPP Investments and General Motors Ventures among the investors.

After the 2021 round the company never closed another major financing, and as Nvidia's dominance of AI hardware grew, fundraising attempts collapsed — worsened by US tariff uncertainty in 2025, per The Globe and Mail. Untether kept shipping products, launching the speedAI240 Slim inference accelerator in October 2024 with a claimed 3x energy-efficiency gain, but it ran out of runway. In early 2024 it hired Intel veteran Chris Walker as CEO to lead the fundraising push; he left a month before the AMD deal.

In June 2025 Untether entered an acquihire with AMD, which took the engineering team without buying the company's assets or IP; Untether VP Bob Beachler said the deal 'marks the end of Untether AI's journey' and that speedAI and imAIgine would no longer be sold or supported. On October 14, 2025 the remaining company filed for bankruptcy with about $25M in assets against $128M in liabilities, appointing PricewaterhouseCoopers as trustee.

The core bet on beating Nvidia with a more efficient chip needed years of sustained capital, but after the 2021 round no major investor came in.

Inference demand consolidated on Nvidia's ecosystem, so even a technically admired architecture struggled to convert into revenue.

Macro headwinds — US tariff uncertainty and AI-chip market concentration — cratered fundraising just as the runway was running out.

The company kept building products (speedAI240) while the sales and funding engine stalled, so engineering outran commercial traction.

An acquihire was the only exit: AMD took the team for its AI compiler and chip-design work, leaving the company to liquidate with a $103.6M deficiency.

A clever chip architecture is not a moat against Nvidia: Untether's in-memory chips impressed analysts, but with no funding after 2021 and demand consolidating on GPUs, the runway ran out.

As of October 2025 Untether AI was in bankruptcy with PricewaterhouseCoopers as trustee, roughly $25M in cash assets against $128M of liabilities, and its investors — Middlefield Ventures, Radical Ventures, GM Ventures, CPP Investments and others — listed among the largest unsecured creditors. The speedAI products and imAIgine SDK were discontinued after the June AMD acquihire, and founders Martin Snelgrove and Raymond Chik launched a new Toronto venture, Hepzibah AI, to continue energy-efficient compute work.