---
title: "Companies and startups building the AI stack"
description: "Explore source-linked AI companies across evals, agents, infrastructure, hardware, robotics, scientific AI, and model systems."
canonical_url: "https://fanout.sh/companies"
md_url: "https://fanout.sh/companies.md"
last_updated: "2026-08-10"
access: "public"
---

# Companies and startups building the AI stack

Explore source-linked AI companies across evals, agents, infrastructure, hardware, robotics, scientific AI, and model systems.

## Public overview

Fanout tracks research companies and startups working across evaluations, agents, infrastructure, hardware, robotics, scientific AI, and model systems.

The public directory is a curated preview. Complete records and sourced public business contacts require Fanout Pro access.

## Public company preview

### [Mechanize](https://mechanize.work)

RL environment company focused on Code.

- Domains: RL environments, Code
- Founders and research leads: Tamay Besiroglu, Ege Erdil, Matthew Barnett

### [Datacurve](https://datacurve.ai)

RL environment company focused on Code.

- Domains: RL environments, Code
- Founders and research leads: Serena Ge, Charley Lee

### [Halluminate](https://halluminate.ai)

RL environment company focused on Finance and Enterprise.

- Domains: RL environments, Finance, Enterprise
- Founders and research leads: Jerry Wu, Wyatt Marshall

### [Pareto](https://pareto.ai)

RL environment company focused on Multi-Domain and Tool Use.

- Domains: RL environments, Multi-domain, Tool use
- Founders and research leads: Phoebe Yao, Mark Whiting, Youssef Elhady, Joe Crawley

### [Proximal](https://proximal.ai)

RL environment company focused on Code.

- Domains: RL environments, Code
- Founders and research leads: Justus Mattern, Navid Pour, Calvin Chen

### [Collinear](https://collinear.ai)

RL environment company focused on Enterprise and Long Horizon.

- Domains: RL environments, Enterprise, Long horizon
- Founders and research leads: Nazneen Rajani, Soumyadeep Bakshi

### [Latch](https://latch.bio)

RL environment company focused on Science.

- Domains: RL environments, Science
- Founders and research leads: Alfredo Andere, Kenny Workman, Kyle Giffin

### [Quesma](https://quesma.com)

RL environment company focused on Security.

- Domains: RL environments, Security
- Founders and research leads: Jacek Migdal

### [ReasonCore](https://reasoncore.ai/)

RL environment company focused on Science and Code.

- Domains: RL environments, Science, Code
- Founders and research leads: Geoff Wolfe, Anshuman Lall, Satish Vutukuru

### [BenchFlow](https://benchflow.ai)

RL environment company focused on Enterprise and Browser.

- Domains: RL environments, Enterprise, Browser
- Founders and research leads: Xiangyi Li

### [Cua](https://cua.ai)

RL environment company focused on Code and Computer Use.

- Domains: RL environments, Code, Computer use
- Founders and research leads: Francesco Bonacci, Dillon DuPont

### [EdotEnv](https://edotenv.com)

RL environment company focused on Long Horizon and ML.

- Domains: RL environments, Long horizon, ML
- Founders and research leads: Rui Wang, Michael Zhang

### [Emulated](https://emulated.so)

RL environment company focused on Code and ML.

- Domains: RL environments, Code, ML
- Founders and research leads: Joseph Wang, Sid Patllollu

### [General Reasoning](https://gr.inc)

RL environment company focused on Finance.

- Domains: RL environments, Finance
- Founders and research leads: Ross Taylor, Chengxi Taylor, Kip Parker, Thomas Grady

### [Tacit Labs](https://tacitlabs.co)

RL environment company focused on Science and Long Horizon.

- Domains: RL environments, Science, Long horizon
- Founders and research leads: Nicole Fitzgerald, Anne Marie Droste

### [Ulam](https://www.ulam.ai)

RL environment company focused on Math.

- Domains: RL environments, Math
- Founders and research leads: Przemek Chojecki

### [ARIMLABS](https://arimlabs.ai)

RL environment company focused on Security and Long Horizon.

- Domains: RL environments, Security, Long horizon
- Founders and research leads: Mykyta Mudryi, Markiian Chaklosh

### [Chakra Labs](https://www.chakra.dev/)

RL environment company focused on Computer Use and Tool Use.

- Domains: RL environments, Computer use, Tool use
- Founders and research leads: Nirmal Krishnan, Alex Fung

### [dmodel](https://dmodel.ai)

RL environment company focused on ML and Alignment.

- Domains: RL environments, ML, Alignment
- Founders and research leads: Anish Tondwalkar, Daniel Moon

### [Taste Labs](https://tastelabs.com)

RL environment company focused on Design.

- Domains: RL environments, Design
- Founders and research leads: Thais Castello Branco

### [Anthromind](https://anthromind.com)

RL environment company focused on Medical and Long Horizon.

- Domains: RL environments, Medical, Long horizon
- Founders and research leads: Pratik Karki, Mannat Sandhu

### [Good Start Labs](https://www.goodstartlabs.com)

RL environment company focused on Games and Long Horizon.

- Domains: RL environments, Games, Long horizon
- Founders and research leads: Alex Duffy, Tyler Marques

### [Normal](https://normal.ai)

RL environment company focused on Hardware Engineering.

- Domains: RL environments, Hardware
- Founders and research leads: Hudzah, Anson Yu

### [Phinity](https://phinity.ai)

RL environment company focused on Chip Design.

- Domains: RL environments, Chip design
- Founders and research leads: Sonya Jin, Aadi Nashikkar

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