# Halluminate

> Halluminate is a San Francisco startup (Y Combinator S25) building realistic, resettable sandboxes and high-quality datasets to train and evaluate computer- and browser-use AI agents. Its flagship project, Westworld, is a fully simulated internet of synthetic consumer and enterprise apps where agents practice economically valuable tasks - booking flights, financial modeling, reorganizing data - against programmatic verifiers that produce reinforcement-learning reward signals. Customers include foundation-model labs and browser-agent companies.

- **Founded:** 2024
- **Headquarters:** San Francisco, California, United States
- **Founders:** Jerry Wu (Co-Founder & CEO), Wyatt Marshall (Co-Founder & CTO)
- **Team size:** ~5-15
- **Products:** Westworld, Realistic Sandboxes, Datasets & Benchmarks, Evaluation & Error Analysis
- **Notable:** Selected for Y Combinator Summer 2025 batch, Built Westworld, a fully-simulated internet for training computer-use agents, Powered a partner agent (Yutori) to an 86.0% average across 100 Westworld tasks, including 100% on Megamart

## Products & services

- **Westworld** — A fully-simulated internet made of synthetic versions of common consumer and enterprise apps. Agents receive a task objective and a programmatic verifier, practice tasks like flight booking, financial modeling and data reorganization, and generate reinforcement-learning reward signals. Procedurally generated, deterministic, and runs offline with no internet dependencies.
- **Realistic Sandboxes** — Fully managed, parallelizable environments modeled after popular systems such as Salesforce, Slack, ticketing software and websites, resettable for reproducible training and evaluation at scale.
- **Datasets & Benchmarks** — High-quality, curated training datasets and evaluation benchmarks for computer- and browser-use agents.
- **Evaluation & Error Analysis** — Human-generated data services including agent evaluation and detailed error analysis to diagnose where agents fail.

## Achievements

- Selected for Y Combinator Summer 2025 batch
- Built Westworld, a fully-simulated internet for training computer-use agents
- Powered a partner agent (Yutori) to an 86.0% average across 100 Westworld tasks, including 100% on Megamart
- Helped a customer achieve ~20% improvement in date-picking performance via a flight-booking simulator
- Serving leading computer-use model labs and browser-agent companies
- Open-sourcing environments via the Halluminate/westworld GitHub repository

## Latest updates

- **2025-08** — Launched publicly via Launch HN and Y Combinator as part of the S25 batch: 'Simulating the internet to train computer use.'
- **2025-08** — Reported seed funding round.
- **2025-08** — Published Westworld v1 and a Yutori partnership benchmark showing 86.0% average agent performance across 100 tasks.

## Links

- Website: https://halluminate.ai
- LinkedIn: https://www.linkedin.com/company/halluminate
- GitHub: https://github.com/Halluminate

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Profile page: https://yespress.io/halluminate-yc-s25
Published by YesPress — https://yespress.io
Last updated: 2026-08-05