Simon Kubica

Founder & CEO

Simon Kubica is an Australian entrepreneur and the co-founder and CEO of Alloy (formerly Index), one of the only Australian companies ever accepted to Y Combinator. He has featured in Forbes and Business Insider, and was previously a product leader at Atlassian, working on Jira, Forge, and new products and platforms.

simonkubica.com

Libraries and components
Prototype with your real design system.
Prototypes land better when they are built from the components your product actually ships. Libraries give the Alloy agent your design system to build with, so...

Alloy at ProductCon London 2026
In this hands-on demo, Simon Kubica demonstrates how non-technical leaders can move beyond static PRDs to vibe their ideas into existence.

MCP connectors
Bring the tools your team already uses into Alloy agent sessions.
Product work spans research, analytics, support, planning, and billing tools. MCP connectors give the Alloy agent secure access to...

Y Combinator Features Alloy
Alloy is the tool for prototypes that look exactly like your product. PMs and designers have struggled with off-brand prototypes built with "app builder" tools that look nothing like their existing apps...

Model selection
Switch between models that are faster, cheaper, or more intelligent during your session.
Different prompts call for different tradeoffs. A quick copy change might favor speed and cost, while a complete...

SaaStr AI App of the Week: Alloy
The Bottom Line: Alloy is vibing for product development. You can prototype new features for existing products in plain English in a prompt or two. It's the first AI prototyping tool that captures...

File attachments
Bring the files behind your idea into the session.
Product context rarely lives in screenshots alone. It might be a PDF brief, a spreadsheet of customer data, a video walkthrough, or source code...

From Customer Feedback to Instant AI Prototypes
Dovetail has partnered with Alloy to revolutionize product development by transforming customer feedback directly into AI prototypes. The collaboration enables teams to quickly generate interactive...

Skills
Create reusable skills for your Alloy agent.
Some guidance belongs in every session. Other instructions only matter for a specific workflow, question, or handoff. Skills let you keep those reusable...

Simon Kubica on the Future of Mac Productivity
Alloy co-founder Simon Kubica shares his experience building with Raycast, calling it "by far the best thing to happen to the Mac in years" and discusses creating modern product management tools.

Alloy MCP
Bring Alloy context into your AI assistant.
Alloy sessions hold the design, chat, and code context behind your prototyping work. With Alloy MCP, assistants like...

Investment Notes - Alloy
Blackbird has led a A$3.5M seed round into Alloy, a startup founded by Christian Iacullo and Simon Kubica from Canva and Atlassian, aiming to revolutionize project planning and management for...

Slack integration
Start the Alloy agent from any Slack thread.
A lot of the best product ideas show up in Slack first — a customer request in a Connect channel, a teammate's "what if we just..."

Alloy Brings Product Planning into the AI Age
Alloy is a new product planning tool that helps AI-native product teams unify customer feedback, engineering execution, and design mocks, enabling faster and more efficient product development.

Hide header in previews
Send a preview link that's just your UI, nothing else.
When you share an Alloy session, viewers normally see a small header above it with the session name and controls. That's useful for collaboration...

Alloy Secures Funding from Bain Capital Ventures for Product Management Tools
Alloy has raised funding from Bain Capital Ventures to build next-generation product management and planning tools for modern teams.

Codebase sessions
Start sessions from your codebase.
Until now, every Alloy session began with a page capture. That's a great way to prototype on top of what your product already looks like, but it stops short of the...

Alloy Lands $3.5M Seed Round from Blackbird and Bain
Alloy, the AI-powered product planning platform, has secured $3.5 million in seed funding led by Blackbird Ventures and Bain Capital Ventures.

Folders
Organize your prototypes into folders.
As your team builds more prototypes, a flat list stops working. Folders let you group related prototypes together — by project, team, feature, or however makes sense for your team.

Comments
Leave feedback directly on prototypes.
Prototypes are built to be shared, discussed, and refined. From today, you can comment directly on any prototype. Your team sees the feedback in context, right where it matters.

Responsive chat
See exactly what the Alloy agent is doing as it builds and designs.
We've now made the Alloy agent radically more responsive, with visibility into progress in real time.

2x faster performance
Alloy is now 2x faster.
Last year, speed was the biggest bottleneck in AI prototyping. When a capture takes 10 minutes or a big prompt stalls, momentum evaporates.

Chat mode
Plan before you build.
When you're working on a complex feature, you don't want to make changes while you're still thinking through the approach. Chat mode guarantees you'll only get a chat response...

Brand logos
Add company logos to your prototypes with our new brand logos feature.
It's common to reference other brands when designing SaaS apps today, particularly when prototyping integration pages.

Capture public link
Capture any public web page to use as a starting point for your prototype.
While the Alloy browser extension supports capturing any web page...

Dovetail integration
Dovetail is the leading customer intelligence platform for product teams to analyze feedback.
With our new integration, you can now create AI prototypes directly from your customer feedback...

Desktop app
Alloy is now available as a native desktop app for macOS and Windows.
Get instant access to Alloy from your dock or taskbar.

Introducing Alloy
It's official – I'm excited to introduce Alloy, the world's first tool for prototypes that look exactly like your product.
All year, PMs and designers have struggled with off-brand prototypes – built...

Alloy Wins 2025 Proddy Award for Top Prototyping Product
Alloy has been named the 2025 Proddy Award winner for Top Prototyping Product. The 9th annual Proddys focus on the AI tools product teams rely on daily...

$3.5m Seed Round
As reported by Forbes today, Index just raised an A$3.5m seed round led by Blackbird and Bain Capital Ventures.
It's only been two months since our public launch – and the response has blown us away....