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Untether AI was a Canadian technology company that developed microchips and compilers for neural net processing. The at-memory compute architecture.<ref>{{cite journalbook |last1=Beachler, Snelgrove |titlechapter=Untether AiAI : Boqueria |journaltitle=2022 IEEE Hot Chips 34 Symposium (HCS) |date=2022 |pages=1–19 |doi=10.1109/HCS55958.2022.9895618 |isbn=978-1-6654-6028-6 |chapter-url=https://ieeexplore.ieee.org/document/9895618}}</ref> was built largely on standard silicon processes with some customization done on memory cells and processing elements. The $125 million dollars raised in Series B funding in July 2021.<ref>{{cite web |title=Betakit Series B, July 2021 |date=20 July 2021 |url=https://betakit.com/intel-backed-untether-ai-raises-125-million-adds-cppib-tracker-capital-as-investors/ |access-date=11 June 2025}}</ref> led to a top MLPerf disclosure in August 2024 <ref>{{cite web |title=mlcommons inference results, Aug. 2024 |date=28 August 2024 |url=https://mlcommons.org/2024/08/mlperf-inference-v4-1-results/ |access-date=12 June 2025}}</ref><ref>{{cite news |last1=Ward-Foxton |first1=Sally |title=EETimes MLPerf |url=https://www.eetimes.com/amd-and-untether-take-on-nvidia-in-mlperf-benchmarks/ |access-date=12 June 2025}}</ref><ref>{{cite web |title=yahoo MLPerf, August 2024 |url=https://finance.yahoo.com/news/untether-ai-announces-speedai-accelerator-150000879.html |access-date=11 June 2025}}</ref> and a launch of its speedAI-240 product in October 2024 <ref>{{cite web |title=businesswire speedAI-240, October 2024|url=https://www.businesswire.com/news/home/20241028172679/en/Untether-AI-Ships-speedAI-240-Slim-Worlds-Fastest-Most-Energy-Efficient-AI-Inference-Accelerator-for-Cloud-to-Edge-Applications |access-date=11 June 2025}}</ref>. The MLPerf results indicated the at-memory architecture could achieve 3 to 6X the power efficiency of competing approaches. Despite the early success, Untether AI was shut down in June 2025 <ref>{{cite web |title=eetimes shut down, June 2025 |url=https://www.eetimes.com/untether-ai-shuts-down-engineering-team-joins-amd/ |access-date=11 June 2025}}</ref>
