3Square
2 known investors
Find your way into 3Square
137 people in our graph share verified history with the 3Square team — schools, employers, funds. One of them is your warm intro.
Derek Handleyunlockedknows Jono Caseley · together at AUT University (overlapped)
×3knows the team · via Publicis Groupe
knows the team · via UNiDAYS
×7knows the team · via University of Otago
3Square builds a "Decision OS" that automatically captures engineering decisions—the rationale, trade-offs, and alternatives—within existing developer workflows, creating an organisational memory that supplies context to human and AI decision makers. It integrates into IDEs and coding agents to surface and guide decisions for hybrid human-AI engineering teams and their leaders.
Founders & leadership
JC
Jono Caseleyin𝕏Co-Founder & CEOJono Caseley spent more than 18 years in data, marketing technology and analytics, including a stint as Director of Marketing Analytics at Bain & Company and several roles at Publicis Groupe, where he led data and MarTech for Digitas and served as UK Data Lead for Emil. He was an Entrepreneur in Residence at Antler before starting 3Square in 2025.
AL
Andy LockeyCo-Founder & CTO
Investors · 2
Frequently asked questions
- What does 3Square do?
- 3Square builds a "Decision OS" that automatically captures engineering decisions—the rationale, trade-offs, and alternatives—within existing developer workflows, creating an organisational memory that supplies context to human and AI decision makers. It integrates into IDEs and coding agents to surface and guide decisions for hybrid human-AI engineering teams and their leaders.
- Who founded 3Square?
- 3Square was founded by Jono Caseley, Andy Lockey.
- Who are 3Square's investors?
- 3Square's investors include Antler, Antler Australia.