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Bitrig

YC S25

San Francisco, US · Founded 2025 · 3 employees · 6 known investors

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Bitrig is an AI-assisted development tool for building native applications. Built by former members of Apple's SwiftUI team, it enables developers to create high-quality, polished apps with reduced complexity.

Also known as Aurelia · Aurelia, BitRig, bitrig

AI & Machine LearningDeveloper ToolsEnterprise SoftwareSaaSUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

Bitrig was founded in 2025 by Kyle Macomber, Tim Donnelly, and Jacob Xiao.

KMKyle Macomber
Kyle MacomberCo-founder & CEOPreviously, he spent more than ten years at Apple leading development of SwiftUI and managing teams working on Swift Charts, WidgetKit, and the Swift Standard Library. He holds a degree in Computer Science from Stanford University.
TDTim Donnelly
Tim DonnellyCo-FounderTim Donnelly worked on SwiftUI at Apple and Square, and previously co-founded Storehouse, which was acquired by Square. He holds a BFA in Design from the University of Washington.
JXJacob Xiao
Jacob XiaoCo-founder, EngineeringJacob Xiao spent 15 years at Apple where he led development on SwiftUI and contributed to Xcode and UIKit. He previously built Opacity, a graphical design tool, and is now co-founding bitrig.
MR
Matt RicketsonFounder

Investors · 6

Pioneerlisted by PioneerToronto, Ontario

How we know: Y Combinator's founder network · pioneerfund.vc · open dataset · 5k.vc investor directory · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Batch Venturesreported

How we know: Y Combinator's founder network · Not right? Tell us

General CatalystreportedSan Francisco · $30M

How we know: Y Combinator's founder network · Not right? Tell us

Offline VenturesreportedMill Valley · $250K – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Related companies · 3

AppMySiteA no-code mobile app development platform that enables businesses to build custom iOS and Android applications by configuring pre-built features like authentication, commerce, navigation, and device access without writing code.
MindBodyMindbody provides software and a consumer app platform for fitness, beauty, and wellness businesses to manage operations, attract clients, and book classes and appointments. The platform connects thousands of wellness businesses globally with consumers.
VocalVocal is a creator platform that enables writers and artists to publish content and monetize their work through reader support and community engagement.

Companies working in the same space as Bitrig.

Legal entities · 1

corporate structure
Bitrig, Inc.

In the news

Bitrig – Vibe code, test, and deploy Swift apps. All from your iPhone.ycombinator.com · Aug 2025

Frequently asked questions

What does Bitrig do?
Bitrig is an AI-assisted development tool for building native applications. Built by former members of Apple's SwiftUI team, it enables developers to create high-quality, polished apps with reduced complexity.
Who founded Bitrig?
Bitrig was founded by Kyle Macomber, Tim Donnelly, Jacob Xiao in 2025.
Who are Bitrig's investors?
Bitrig's investors include Designer Fund, Pioneer, Y Combinator, Batch Ventures, General Catalyst, Offline Ventures.
Where is Bitrig headquartered?
Bitrig is headquartered in San Francisco, US.