Agent Relay
Agent Relay is a YC Fall 2026 (F26) company. Based in San Francisco, CA, USA. Team of 2.
About Agent Relay
Summary
Agent Relay builds coordination infrastructure for teams running multiple AI coding agents in parallel. It gives agents such as Claude Code, Codex, and OpenCode a shared messaging layer, persistent session history, and direct connections to tools like GitHub, Linear, and Slack, replacing the manual work of tracking, handoff, and context-switching across separate agent sessions. Engineering teams get a single plane to monitor every agent, enforce human approval steps, and run resumable multi-agent workflows on cloud, local, or self-hosted infrastructure.
Business model
Deployment options include a hosted cloud service or self-hosted runs, though specific pricing terms are not shown on the site.
Go-to-market
Software engineering teams adopt the product through self-serve access supported by public documentation, targeting developers already running AI coding agents who need to coordinate them at scale.
From the Y Combinator listing
Let your teams' coding agents message each other
Agent Relay lets software teams' AI coding agents message each other directly, so people stop copy/pasting between Claude Code, Codex, Cursor, and their teammates' agents. A frontend agent can ask the backend agent what an API returns, two agents can sort out a merge conflict between themselves, and your agent can answer a colleague's agent while you sleep. Agents connect wherever they run: terminals, desktop apps, phones, laptops, cloud boxes, or a Mac mini across the world. Every session goes into shared, searchable history, so decisions don't get stuck in one person's chat. You can even let a customer's agent debug with yours. Setup takes about 5 minutes: give your agent the link and it installs itself. Use our hosted version free, or self-host the open-source version
Facts
- B2B / B2B -> Engineering, Product and Design
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
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