ChangSoft I&I Co., Ltd. is a leading construction IT company driving digital transformation in the Architecture, Engineering, and Construction (AEC) industry through BIM automation.
Our flagship software, BuilderHub, automates detailed design and quantity takeoff (QTO) for reinforced concrete (RC) and finishing works, enabling engineers to achieve higher accuracy, efficiency, and transparency in project cost management.

BuilderHub-Q specializes in RC structural works, providing precise quantity takeoff for rebar, concrete, and formwork, while BuilderHub-A automates finishing design and QTO directly from 2D drawings. Together, these tools streamline the entire preconstruction workflow—from design validation to cost planning—bridging the gap between 2D and BIM environments.

To enhance project quality and decision-making, ChangSoft also offers Smart Checker, a web-based QA tool for comparing design and rebar shop drawings, and Smart DB, a digital database that stores and manages quantity data across projects for future analysis and benchmarking.

Since our founding, we have established partnerships with leading general contractors, engineering firms, and public institutions across Korea and expanded globally through joint ventures such as BnB Solutions (Japan) and KVB BIM Solutions (Vietnam).
Our mission is to empower builders worldwide with intelligent, practical, and locally adapted BIM solutions—realizing the future of digital construction.

ChangSoft I&I

Org chart

Teams

Offices