Y Combinator companies

Enabling Model-Hardware Co-Design at Scale

AI that simulates physics 1000x faster

Floating nuclear powered data centers at sea.

AI chips for ultra-fast model training and inference

The easiest way to make private AI models.

Buy, sell, and redeem GPU hours for any week with instant liquidity

Least cost routing system to reduce 80%+ token spend

AI-controlled optical switching for AI clusters

A Quant Neolab building self-improving agents from quant trading

We make Silicon on the Moon.

Open source OpenRouter that turns your traffic into a better model

Building intellectually curious AI

Lightning fast chips with hardcoded AI models

Distributed, hardware-agnostic AI inference

Training human brain cells for AI compute

Earned intelligence for every company

Teaching AI to Design Chips

Market for future inference capacity

Combining open-source AI models for better answers at lower cost

Self-optimizing neocloud that cuts LLM bills by 80%

Unlock wasted GPU capacity.

AI model built for high accuracy deterministic tasks

Kugel is an on-prem Voice AI model supporting 30+ languages

Near-real-time video infrastructure for LLMs

Emotive foundation voice models

The AI-native observability platform for fast-moving engineering teams

Distributed runtime for AI workloads at scale

Foundation models for 24/7 Earth Observation

AI Cost Management: Track and attribute AI spend across every provider

Distilling Proprietary Intelligence

AI models that learn from experience

The Fastest Multimodal Inference OS

Building AGI that can innovate.

AI Infra for real-time vision applications

The Networking Layer of AI

Building secure polymorphic apps

Infrastructure for Autonomous Science

A faster, lower cost path to custom silicon

Scaling Generalist Speech models

Infrastructure for AI labs to focus on research.

The AI workforce for business operations.

Tiny Edge AI For Tiny Devices

Foundational models for risk and quality.

Building a GPS alternative 100x more powerful with no hardware needed.

We sell GPUs.

Making AI run fast on any hardware.

Analyze any footage, without training a model

Building tiny frontier AI models that run on edge devices

Foundational Voice Models for regional languages

AI that makes AI fast

Software to monitor, control, and optimize data centers.

Custom models trained on your data

Product Native Models

AI Physics Engine to replace simulations and prototypes

Open-source frontier models for knowledge work

Managed GPU-accelerated Spark + SQL at 2x speed and half the cost

Scaling engine for PostgreSQL

quantum-accelerated AI servers

Encrypted AI with verifiable privacy

Manufacturing the most powerful chips, 15x faster

Reinforcement Learning (RL) for AI Agents

A foundation model for physics.

The high-performance file system that connects AI to data

We're training the next generation of protein foundation models.

AI that operates quantum computers for scientific discovery

Look inside the model

An AI physics simulator for AI chip design

Ultra-low latency inference cloud for real-time workloads

Foundation models to simulate Earth, starting with weather.

Data centers in space

Foundation models for time series

VMware for GPUs

Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs.

Energy efficient chips for AI

Unlimited inference at $5 per stream

Make your LLMs 3x faster.

Frontier models and agents you can learn from, audit, and steer.

AI Inference Platform for Drug Discovery

Open source alternative to AWS

Foundation Model for Chemical Manufacturing

Infuse knowledge into language models with just 10 samples

Unify application data, vectors, and full-text search in one Postgres

The GPU Cloud Marketplace

Infrastructure for managing GPU clusters for training/serving.

Building infrastructure tools to help large companies customize their…

Real-time generative AI

We build tools to help humanity predict the future.

Train AI on distributed data

KV Cash, a blockchain where contracts can finally think

type text, dream video

AI-based full stack observability platform

Deploy Machine Learning Models with One Command

Run AI pipelines 10x faster

Accelerate verifiable computing

Serverless Infrastructure Platform for AI

Multicolor lasers for ultrafast data transmission

LLM for Legal in Brazil

Classify Anything

10x-1000x faster compute for Neural Network training

Nuclear-inspired cooling that turns wasted power into more AI compute