Rainbrand
<!-- hacklab:yc-profile -- YC company profile The brand layer for agents. Rainbrand is the brand layer for agents. It turns a brand’s identity, guidance, and assets into shared…
About Rainbrand
YC company profile
The brand layer for agents.
Rainbrand is the brand layer for agents. It turns a brand’s identity, guidance, and assets into shared context that agents and products can use. That context evolves with the brand, alongside the tools where it is created and managed.
Starting with websites, social media, and files, Rainbrand develops and maintains versioned brand context. Through MCP or the API, connected agents and products can retrieve and update that context, then apply it to images, websites, slides, video, copy, and other brand work.
We’re an ai infra company making brand as operable as software.
- YC batch: Spring 2026
- Founded: 2025
- Team size: 3
- Location: San Francisco
- Country: US
- Status: Active
- Industry: B2B
- Stage: Early
- YC partner: Pete Koomen
Founders
Ray Fitzgerald — Founder/CEO
Founder of Rainbrand - the brand layer for agents.
Rainbrand turns brand into infrastructure that any agent, app, or platform can call.
Before Rainbrand, I founded Lucid - an AI-native word processor.
Before that I worked at Inscribe (S18), where I built agents to prevent financial fraud.
Obsessed with product and organic growth.
Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.