---
name: "Lightsage"
type: Organization
description: "Lightsage is a San Francisco software company that helps developer tools and B2B software companies understand and improve how AI coding agents such as Claude Code, Codex and Cursor discover, use and pay for their products. Its Agent-Led Growth platform runs simulated agent tasks across APIs, SDKs, CLIs and MCP servers, pinpoints where agents fail, and tracks real agent traffic on a company's website and documentation. Founded by CEO Jun Liang Lee and CTO Sean Er, Lightsage raised a $4 million seed round led by Nexus Venture Partners in September 2026."
industry: "AI software"
founded: "2024-01-01T00:00:00.000Z"
url: https://lightsage.com
image: https://cdn.nanimediahouse.com/lightsage-logo.webp
canonical: https://www.sovereignmagazine.com/companies/lightsage
publication: Sovereign Magazine
---

# Lightsage

Lightsage is a San Francisco software company that helps developer tools and B2B software companies understand and improve how AI coding agents such as Claude Code, Codex and Cursor discover, use and pay for their products. Its Agent-Led Growth platform runs simulated agent tasks across APIs, SDKs, CLIs and MCP servers, pinpoints where agents fail, and tracks real agent traffic on a company's website and documentation. Founded by CEO Jun Liang Lee and CTO Sean Er, Lightsage raised a $4 million seed round led by Nexus Venture Partners in September 2026.

## People

- **Sean Er** - CTO and Co-Founder
- **Jun Liang Lee** - CEO and Co-Founder

## Coverage

- [undefined](/article/lightsage-4m-seed-agent-led-growth-nexus) - Artificial Intelligence, 2026-09-08