# Ylem Labs

> Ylem Labs, Inc. is an AI company with R&D hubs in San Francisco and Astana. It researches JEPA-style world models and ships one stack for autonomous agents: Harness, Gateway, Box, Guard, and World.

Ylem (pronounced "eye-lem") is the primordial matter from which all elements formed, in the sense used by Gamow and Alpher in 1948. The company site is https://ylemlabs.ai. A longer citation text is at https://ylemlabs.ai/llms-full.txt.

Agents are built in Box, run in Harness, reach models through Gateway, and pass Guard on every call. The interfaces are open, so a team can swap a layer for its own.

## Products

- [Harness](https://ylemlabs.ai/#architecture): Agent runtime and the R&D core. Plan/act/verify loops, typed tools, memory, skills, MCP, sandboxes, and background jobs on a Pydantic-typed core. Status: R&D preview, v0.4.
- [Gateway](https://ylemlabs.ai/#ecosystem): One OpenAI-compatible API to 300+ models from 40+ providers, with live routing, fallback under 300 ms, semantic cache, batch, and per-team budgets. Status: live, v1.2.
- [Box](https://ylemlabs.ai/#ecosystem): Agent builder. Compose agents from prompts, tools, knowledge, and MCP servers, then deploy them in your cloud. Status: beta, v0.6.
- [Guard](https://ylemlabs.ai/#ecosystem): AI firewall. Policy-as-code checks on every model call for PII, secrets, document leakage, and prompt injection, with an in-house guard model. Status: pilots, v0.8. Path: monitor, then calibrate, then enforce.
- [World](https://ylemlabs.ai/#research): JEPA-style world models that predict in latent space so agents can plan over consequences. Status: research, in training.

## Research

Titles listed on the research section:

- [Latent planning for tool-using agents](https://ylemlabs.ai/#research) (October 2026)
- [Harness > Model: how much of agent quality comes from scaffolding](https://ylemlabs.ai/#research) (September 2026)
- [Tunneling Fallback: latency-bounded routing across providers](https://ylemlabs.ai/#research) (August 2026)
- [Cascaded guard models at the gateway](https://ylemlabs.ai/#research) (July 2026)

## Company

- [Home](https://ylemlabs.ai/): The full stack for autonomous AI
- [Privacy](https://ylemlabs.ai/privacy): What the site and the products collect, and the rule that World models are not trained on customer content
- [Terms](https://ylemlabs.ai/terms): Rules for the site and for Gateway, Box, Guard, and Harness
- [Security](https://ylemlabs.ai/security): Where a call is inspected, where data sits, and how to report a vulnerability

## 中文

- [中文页面](https://ylemlabs.ai/zh): 给中文搜索引擎和中文模型的公司简介
- [中文引用文本](https://ylemlabs.ai/llms-zh.txt)

## Contact

- Sales: sales@ylemlabs.ai
- Privacy: privacy@ylemlabs.com
- Legal: legal@ylemlabs.com
- Security: security@ylemlabs.com
- Places: San Francisco and Astana
- Hiring: researchers and engineers in both hubs