SF Tensor
Infrastructure for AI labs to focus on research.
Y CombinatorFall 2025ActiveB2BInfrastructure
What they do
Problem
AI labs waste significant time and money configuring cloud GPU infrastructure, handling distributed training issues, and optimizing kernels instead of focusing on research.
Solution
A managed Elastic Cloud that sources the cheapest GPUs across providers and handles preemption plus automatic kernel optimization to speed up training workloads.
Who it's for
AI researchers and machine learning engineering teams at AI labs running large-scale model training.
Founders
Ben Koska
Founder
Optimizing GPU Kernels @ SF Tensor.
Luk Koska
Founder
Optimizing AI infrastructure @ SF Tensor (F25). Finished BSc in CS @ age 16
Tom Koska
Founder
Optimizing AI infrastructure @ SF Tensor (F25). Finished BSc in CS @ age 16
Open roles 4
Company timeline
- Founded2025
- YC batchFall 2025
- StatusActive
- Team size5 people
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