SF Tensor

SF Tensor

Hardware-agnostic AI and HPC software stack

Overview

SF Tensor builds an AI/HPC software and infrastructure stack to reduce the infrastructure burden for AI teams. It offers Emma Lang, a hardware-agnostic programming language that runs across GPUs and TPUs without rewriting code, and the SF Tensor Stack, including Kernel Optimizer and Elastic Cloud. The Kernel Optimizer turns models into efficient mathematical forms by simulating hardware topology, often outperforming hand-tuned code, while Elastic Cloud finds cost-effective hardware across clouds and coordinates large-scale training. The goal is to remove vendor lock-in, enable cross-cloud, hardware-agnostic compute, and cut compute costs so AI researchers can focus on innovation.

YC Company
Launched Recently

About SF Tensor

Simplify's Rating
Why SF Tensor is rated
C-
Rated C on Competitive Edge
Rated C on Growth Potential
Rated D+ on Differentiation

Industries

Data & Analytics

Hardware

Enterprise Software

AI & Machine Learning

Company Size

1-10

Company Stage

Seed

Total Funding

$130K

Headquarters

San Francisco, California

Founded

2025

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Simplify's Take

What believers are saying

  • SF Tensor launched Elastic Cloud beta on October 6, 2025.
  • Careers page lists four open engineering roles, including GPU compiler and kernel hires.
  • As of June 20, 2026, Y Combinator still lists SF Tensor active.

What critics are saying

  • NVIDIA CUDA dominates AI tooling, so Emma faces steep adoption friction through 2026.
  • A tiny 1-10 person team limits delivery against Anthropic, Databricks, and Anyscale.
  • No customer logos or revenue disclosures signal existential product-market-fit risk by 2026.

What makes SF Tensor unique

  • YC-backed since 2025, SF Tensor combines Emma, kernels, and cross-cloud orchestration.
  • Kernel Optimizer targets hardware topology and formally verifies kernels before production runs.
  • Elastic Cloud spans 1 to 10,000 GPUs, reducing vendor lock-in across providers.

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Funding

Total Funding

$130k

Below

Industry Average

Funded Over

1 Rounds

Notable Investors:
Seed funding is usually the first official round after pre-seed, when a startup has a prototype or concept. It’s typically used to develop the product, test the market, and start building the team. Investors here are often angel investors or early-stage venture capitalists.
Seed Funding Comparison
Below Average

Industry standards

$3.3M
$130k
SF Tensor
$1.5M
Slack
$2M
Netflix
$2.3M
Instacart
$3M
Robinhood

Benefits

Relocation Assistance

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