hud

Platform for building RL environments and evals

hud.so

HQ: San Francisco, CA, USA

1-10

B2B

Company research

Public company, workplace, funding, and market signals

Updated Jul 29, 2026

Overview

HUD (Human Union Data, Inc.) is a Y Combinator W25-backed platform for building, training, and evaluating RL environments and agent evals, with a vendor marketplace for post-training data and tooling for computer-use/browser-use agents.

Primary product

Platform for building RL environments, evaluations, and post-training data workflows for AI agents

Founded

2025

Headquarters

San Francisco, California, United States

Team size

1-10

Work style

Flexible

Industry

Technology, Information and Internet

Sub-industry

AI agent evaluation and RL training environment platform

Offices

San Francisco Bay Area, United States

Singapore

Remote (some roles)

Business model

B2B SaaS

Usage-based cloud platform

Marketplace for post-training data

Enterprise software

Funding

Stage

Series A

Total raised

$16M

Latest round

Series A · Jun 2026

Latest amount

$16M

Series A

Jun 2026 · Standard Capital

$16M

Pre-Seed

Mar 2025 · Y Combinator

$500K

Non Equity Assistance

Jan 2025

People & investors

Leadership

Jay Ram

CEO, Co-founder

Lorenss Martinsons

Founder, Co-CEO

Parth A. Patel

Co-Founder, CTO

Investors

Work & culture

Frontier-AI-oriented, high-velocity, and research-heavy; the team emphasizes shipping in the open, publishing research, and using AI tools deeply in day-to-day engineering. Official materials describe a mostly in-person Bay Area team with some remote flexibility and a team that includes Olympiad medalists and researchers.

Work style

Flexible

Visa sponsorship

Yes

Compensation

YC job postings list Research Engineer and Full-Stack Engineer compensation at roughly $140K-$250K, with additional role ranges shown around $70K-$170K for other positions. The company also signals high-caliber hiring, visa/relocation support, and strong benefits.

Benefits

100% covered medical, dental, and vision insurance (Blue Shield of CA)

Lunch and dinner when in office

Company-wide holiday break from Christmas Eve to New Year’s Day

Additional PTO and paid holidays

Equinox membership

401k

Commuter benefits

Unlimited access to ChatGPT, Claude Code, Cursor, and similar AI tools

Product & market

Pricing

Freemium + usage-based cloud pricing + custom enterprise pricing

Differentiators

—Environment SDK for defining evals, environments, and verifiers
—Vendor platform for connecting post-training suppliers with AI labs
—Automated QA for agent tasks, including grader-mistake and reward-hacking detection
—Failure analysis with code-level root cause diagnosis
—Prompt-grader alignment verification
—False negative/false positive detectors
—Claims of 1.3M+ task runs, 2,500+ environments, and 15M+ inference calls

Technology

Python

TypeScript

React

Docker

Kubernetes

PostgreSQL

Redis

AWS Lambda

Linux

OpenAI-compatible APIs

MCP

GitHub Actions

Customers

DoorDash

Sharpe

UiPath

Monday.com

Axonius

Guardz

ZoomInfo

Cyera

Scale & contact

Estimated revenue

About $1.1M ARR (estimated)

Estimated monthly visits

1.1K

Traffic estimate as of Mar 2026

team@hud.so

Latest news

Announcing HUD's $16M Series A

HUD AI · Jun 2026

HUD announced a $16M Series A led by Standard Capital and framed the company as software for turning data into better AI via RL environments.

Frontier RL Environments Hackathon at Y Combinator

LinkedIn · Jun 2026

HUD hosted a hackathon at YC with 200+ builders and promoted RL environments for autonomous farming, gene editing, city planning, world simulations, and games.

HUD Series A led by Standard Capital

Standard Capital Changelog · Jun 2026

Standard Capital said it led HUD's Series A and described vendors already selling millions of dollars a month of data to labs through HUD.

Hud natively supports GitHub Agentic Workflows

HUD AI blog · Jun 2026

HUD announced native support for GitHub Agentic Workflows, positioning its product as production context for agentic coding inside GitHub workflows.

Building an RL Environment to Train Agents for Production Debugging

HUD AI case studies · Jan 2026

HUD highlighted production-debugging RL environments across Sentry, Supabase, Railway, and Kubernetes, describing 24 real production tasks.

Jobs and careers at hud

17 jobs at hud

Research Engineer, Privacy and Anonymization

On-site

Research

San Francisco; San Francisco, California, United States

3d ago

On-site

Full-time