Cerebras Systems

Modal Labs, founded in 2021 in New York, provides cloud-based infrastructure for developers and data teams building generative AI applications.

D-Matrix, founded in 2019 in Santa Clara, California, USA, develops AI inference chips and systems for data centers.

Etched develops AI inference ASICs optimized for Transformer models (codenamed Sohu), positioning as an alternative to Nvidia GPUs.

Founded in 2020 in Seongnam, South Korea, Rebellions designs energy-efficient AI inference chips.

Wafer (formerly Herdora) is a San Francisco-based AI infrastructure optimization company founded in 2025 by Emilio Andere and Steven Arellano, a Y Combinator S25 graduate. It builds autonomous performance-engineering AI agents that continuously profile real production inference traffic and optimize the full serving stack — model selection, inference engine, GPU kernels, batching/scheduling, and hardware — with a focus on squeezing more AI inference performance and cost-efficiency out of non-Nvidia chips such as AMD GPUs, offering serverless and dedicated inference services. Customers include DigitalOcean, Vercel, AWS, Neon Health, and Vapi.

DensityAI, founded by former leaders of Tesla's Dojo supercomputer program and based in Mountain View, CA, builds full-stack AI compute infrastructure — custom chips using 3D DRAM stacking and near-memory compute, plus hardware and software — for high-density AI data centers, now positioned as a fast inference solution for frontier models. It reportedly has a conditional chip-procurement agreement with AWS contingent on performance benchmarks.