Wafer, a San Francisco startup from Y Combinator's Summer 2025 batch, builds AI agents that act as autonomous performance engineers to optimize GPU kernels for AI inference workloads. Founded by Emilio Andere and Steven Arellano, its product profiles production LLM serving stacks and rewrites kernels, batching, scheduling, and memory layout to cut cost per token, delivering serverless and dedicated inference for popular open-source models. The team is backed by Y Combinator and Fifty Years, with support from AI infrastructure veterans including former OpenAI co-founder Wojciech Zaremba.
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Sep 1, 2026
Latest raise
Funding activity · 1 round
Sep 1, 2026
$40M
Series A
Led by Marathon Management Partners
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