AI prototyping built for professional teams

Alloy is the world’s first tool for prototypes that look exactly like your product:

➤ Capture your product from the browser in one click
➤ Chat to build your feature ideas in minutes
➤ Share a link with teammates and customers
➤ 30+ integrations: Linear, Notion, Jira Product Discovery, and more

The story behind Alloy

Hey! I’m Simon Kubica, CEO of Alloy. I co-founded the company with Christian Iacullo after our time working at Canva and Atlassian. We founded the company with one mission: give product leaders new superpowers.

Initially, we focused on the workflow of planning and prioritization. But with AI, we started to notice PMs could finally do the work, rather than just plan it. We completely re-oriented the company to build a dedicated tool for this new PM workflow.

The problem is that even with new AI app builder tools, PMs are struggling with off-brand prototypes. Using chat to prototype is powerful, but the outputs didn’t look anything like their existing app.

We felt that your prototypes should look like your actual product.

So starting today, they actually can.

The fastest-growing AI prototyping tool of 2025

Product leaders at top companies have signed up shockingly fast:
➤ 42% of the Forbes Cloud 100
➤ 17% of the Fortune 500
➤ Growing usage at Harvey, Hubspot, Canva, SeatGeek, Linktree, and thousands more

Today we’re launching to bring the power of Alloy to the YC community.

Ready to try the future of prototyping?

Alloy takes 30 seconds to set up:

• Add the browser extension
• Capture your product from the browser
• Send a message with your idea or drop in your product requirements doc

We couldn’t be more excited to hear what you think!