Stonemason

Stonemason is a software and app studio organized as a permanent holding company. According to its official website, it builds and acquires software businesses and then works to make them "rock solid." Rather than buying companies to resell them, Stonemason states that it compounds and protects their value indefinitely, describing its model as combining "the speed of an AI startup and the discipline of a holding company." The company operates an internal AI studio called The Stonemason Chisel, which it says strips legacy code bloat, standardizes infrastructure, and automates operations across every asset it holds. Its portfolio is organized around AI agents and vertical AI products. One named portfolio company is Regulara, described as AI-native compliance automation for EU financial institutions, built and optimized on the Stonemason stack. Other disclosed projects include Project Slate, a stealth acquisition of a high-volume B2B enterprise software asset undergoing core AI stack restructuring; Project Obsidian, a consumer AI app in active development; and an undisclosed consumer personal AI agent planned for 2026, plus a vertical AI product targeted for Q4 2026. Stonemason positions itself as an acquirer of stalled, legacy, or underoptimized software businesses across various niches, inviting companies to present themselves for acquisition. Its stated long-term model is to acquire and improve existing software businesses in the same way it builds its own products. The brand's public identity is therefore that of a holding company and software studio rather than a single product brand. Because the available evidence is limited to the company's own website and a Wikidata description, details such as founding year, headquarters, ownership structure, and executives are not established here. The company presents itself as private and permanent-capital oriented, with no public listing indicated.

Stonemason presents itself as a software and app studio built on a permanent holding company framework. Its official website states that it builds and acquires software businesses and then makes them "rock solid." The company describes a model in which it builds products, grows them, and streamlines and automates operations using AI agents developed in-house. When a product works, Stonemason says it does not sell it but instead scales it, holds it, and compounds its value indefinitely. The company's long-term model is to acquire and improve existing software businesses in the same way it builds its own. It actively seeks stalled, legacy, or underoptimized software businesses across various niches and invites companies to present themselves for acquisition. Its internal AI studio, The Stonemason Chisel, is described as stripping legacy code bloat, standardizing infrastructure, and automating operations across every asset the company holds. Disclosed portfolio activity includes Regulara, an AI-native compliance automation company for EU financial institutions, built and optimized on the Stonemason stack. Project Slate is described as a stealth acquisition of a high-volume B2B enterprise software asset currently undergoing core AI stack restructuring. Project Obsidian is a consumer AI app in active development and system optimization. The company also lists an undisclosed consumer personal AI agent planned for 2026 and an undisclosed vertical AI product targeted for Q4 2026. Beyond these self-described activities, the available evidence does not establish a dated corporate history, founding year, headquarters, or ownership details. The Wikidata entry describes Stonemason simply as a holding company that builds, acquires, and improves software businesses.

• Regulara is described as a portfolio company providing AI-native compliance automation for EU financial institutions.

• Project Slate is described as a stealth acquisition of a high-volume B2B enterprise software asset undergoing core AI stack restructuring.

• Project Obsidian is described as a consumer AI app in active development and system optimization.

• An undisclosed consumer personal AI agent is listed as planned for 2026.

• An undisclosed vertical AI product is listed as targeted for Q4 2026.

A permanent holding company and AI-native software studio that acquires and improves software businesses rather than flipping them.

• Regulara

  AI-native compliance automation for EU financial institutions, built and optimized on the Stonemason stack.

• The Stonemason Chisel

  Internal AI studio that strips legacy code bloat, standardizes infrastructure, and automates operations across every asset Stonemason holds.

• Project Slate

  Stealth acquisition of a high-volume B2B enterprise software asset currently undergoing core AI stack restructuring.

• Project Obsidian

  Consumer AI app currently in active development and system optimization.

• Undisclosed consumer personal AI agent

  A personal AI agent that handles complex everyday tasks autonomously, from research and scheduling to decisions and follow-ups; in private development and planned for 2026.

• Undisclosed vertical AI product

  An AI agent built to own a specific high-friction vertical; targeted for Q4 2026.

1. 1Stonemason — We Build and Acquire Software Businessesstonemason.io
2. 2Stonemasonwikidata.org