We build and acquire software businesses, then make them rock solid.
Regulara
Portfolio Company. AI-native compliance automation for EU financial institutions, built and optimized on the Stonemason stack.
View Company →Project Slate
Stealth Acquisition. High-volume B2B enterprise software asset currently undergoing core AI stack restructuring.
The Stonemason Chisel
Our internal AI studio strips legacy code bloat, standardizes infrastructure, and automates operations across every asset we hold.
Project Obsidian
Stealth Development. Consumer AI app currently in active development and system optimization.
Seeking the Next Stone
We actively acquire stalled, legacy, or underoptimized software businesses across various niches.
Present a Company →Rock Solid. Forever.
Built on a permanent holding company framework. We do not flip companies — we compound and protect their value indefinitely.
Stonemason is a software and app studio. We build products, grow them, and streamline and automate operations using AI agents we develop in-house.
When something works, we don't sell it — we scale it, hold it, and compound its value indefinitely. Our long-term model is to acquire and improve existing software businesses the same way we build our own.
Every product we ship is run with the speed of an AI startup and the discipline of a holding company.
Portfolio
Financial Services
An AI agent that automates regulatory compliance for EU financial companies.
Consumer
A personal AI agent that handles complex everyday tasks autonomously — from research and scheduling to decisions and follow-ups. Currently in private development.
Stealth
An AI agent built to own a specific high-friction, labor-heavy workflow end to end. Outcome-priced. Industry to be announced.
Building something interesting? Let's talk.
We partner with, invest in, and acquire software and app businesses across various niches. If you're building something with traction or looking for the right long-term home for your product, we want to hear from you.