OpenProse — Startup Profile

An open-source operating system for reliable long-running agents

HQ: San Francisco, CA | Founded: 2026 | Employees: 3 | Stage: Seed | Website: https://prose.md

About

OpenProse is building open-source infrastructure for long-running AI work: a declarative language plus a reactive harness/runtime for reliable agent workflows. Write programs as Markdown files with service contracts, paired with a runtime to execute long-running agent tasks reliably.

The Take

OpenProse is a Y Combinator startup offering an innovative open-source operating system designed for reliable long-running agents.

Key Metrics

• STAGE: Seed
• EMPLOYEES: 3
• FOUNDED: 2026
• HQ: San Francisco, CA
• VALUATION: Undisclosed
• FUNDING (BACKERS): Y Combinator (S26)

Funding Rounds

• Round: Undisclosed (2026)

Key People

• Dan Barrett — Founder

Timeline Highlights

• 2023-10-01: Product Development Update
• 2023-09-15: Seed Funding Secured
• 2023-09-01: Company Launch

Recent News

• OpenProse Launches New Open-Source OS (2023-09-01)
• OpenProse Receives Seed Funding (2023-09-15)
• OpenProse Product Development Update (2023-10-01)

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