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Wafer (YC S25) — AI that makes AI fast

Wafer builds AI agents that work as autonomous performance engineers, optimizing GPU kernels for AI inference. Our product is serverless and dedicated inference for the world’s fastest open source LLMs, achieved by Wafer's autonomous performance engineers.

Wafer is a Y Combinator company in the Summer 2025 batch. Its directory entry describes it as: AI that makes AI fast. The founders listed are Emilio Andere (Founder/CEO), Steven Arellano (Cofounder) (Y Combinator directory entry, July 3, 2025).

6 more companies from YC Summer 2025 ↓

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Wafer

New accelerator entry · 2025-07-03 · the record

Summer 2025
batch
15
people
Growth
stage
United States of America
region
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What the record says

BatchSummer 2025
Announced2025-07-03
StageGrowth
StatusActive
Team size15
IndustryB2B
Sub-industryB2B -> Engineering, Product and Design
SectorsArtificial Intelligence
RegionsUnited States of America, America / Canada
BasedSan Francisco, CA, USA
HiringNo
Sitehttps://www.wafer.ai
Founded2025
YC group partnerJared Friedman
Launches posted on YC2
Previously known asHerdora, wafer

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Also in YC Summer 2025

Same batch, B2B first.

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In their words

Wafer builds AI agents that work as autonomous performance engineers, optimizing GPU kernels for AI inference. Our product is serverless and dedicated inference for the world’s fastest open source LLMs, achieved by Wafer's autonomous performance engineers.

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  5. The Money: Funding, Valuation, Runway

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Sourced from the company's Y Combinator directory entry, from the company's own site, read directly on 2026-09-27 (wafer.ai), and from the public GitHub account that record links to (wafer-ai).

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Wafer: Accepted into Y Combinator Summer 2025
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Permanent URL: https://mentionfox.com/funding/yc-wafer
Last updated 2026-10-20
Primary record: Y Combinator directory entry
Wafer (YC S25) — AI that makes AI fast. MentionFox, 2026-10-20. https://mentionfox.com/funding/yc-wafer