Rainbrand
The brand layer for agents.
About Rainbrand
Rainbrand (rainbrand.com, formerly Bloom / trybloom.ai, YC) is the brand layer for agents — an MCP-first product that turns a company's brand into infrastructure. Rainbrand turns a brand's identity, guidance and assets into shared context that agents and products can use, callable from anywhere in the stack — frontend, product design, branding, ads — via MCP and API (CLI coming), so any agent, app, or person produces on-brand output: images, copy, landing pages, campaigns. Originally launched Dec 2025 as Bloom, an on-brand AI image generator (viral launch, 1.4M views, 14K users first week), it pivoted in 2026 to an agent-first "brand-as-infrastructure" model, relaunched on YC in June 2026, and rebranded from Bloom to Rainbrand in Oct 2026. 500K+ assets generated with Rainbrand. Pre-seed ($1M, investors incl. Guillermo Rauch, Nebular VC, YC), founder-led, SF-based, 3-person team.
Open positions (1)
Company details
Funding
Total raised
$1M
Last stage
Pre-seed
Investors
Founders
Ray Fitzgerald
A 26-year-old software engineer from Cork, Ireland, now based in San Francisco. Serial builder who previously went viral with Lucid (an AI writing tool, 400K+ views on launch, 3K+ sign-ups), which attracted a $500K pre-seed led by Nebular VC. Before founding Bloom, he was a Senior Software Engineer at Inscribe AI (YC S18), specializing in AI agent systems and fraud detection. Left Inscribe in February 2025 to pursue Lucid and subsequently pivoted/launched Bloom in May 2025. Has 5,875 followers on X as of April 2026.
LinkedInWhat happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.