HillStar

YC company profile

Agents to help utilities make better buying decisions.

• YC batch: Fall 2026
• Founded: 2026
• Team size: 2
• Location: San Francisco
• Country: US
• Status: Active
• Industry: B2B
• Stage: Early
• Tags: GovTech, Big Data, AI
• YC partner: Garry Tan

Founders

Nooshin Behroyan — Founder/CEO

Founder at HillStar. Previously founded and scaled Paxon Energy from zero to a nationally recognized energy-infrastructure services company serving major U.S. utilities across methane recapture, wildfire mitigation, and oil & gas pipeline integrity management solutions—successfully exited in 2025.

LinkedIn

Kenny Stone — Founder/CTO

Cofounder, CTO at HillStar. Previously, I cofounded PlanGrid (YC W12 – acquired by Autodesk), where we introduced mobile technology and machine learning to the construction industry. Computer Engineering from Purdue.

LinkedIn

Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.