Bentley iTwin

Bentley Systems' iTwin Platform and its open-source iTwin.js library combine engineering, reality, GIS and IoT data into infrastructure digital twins that developers build applications on.

The iTwin Platform is a set of APIs and cloud services from Bentley Systems for building applications around infrastructure digital twins. It takes engineering and design data (CAD, BIM), reality data (photos, point clouds, meshes, drone captures), IoT streams and enterprise business data and keeps them synchronised in one representation, with services for visualisation, reality-data processing, change tracking, access control and reporting. Bentley aims it at developers, system integrators and software companies in transportation, utilities, cities, industrial facilities and construction.

iTwin.js is the open-source library underneath, with code on GitHub. Its core is the iModel, which merges CAD and BIM files, databases, schematics and spreadsheets, and records who changed what and when. Bentley's examples of applications built on the platform include Phozac, which aggregates traffic design data for agencies, and Allvision, which feeds AI-driven field audits of road and rail assets into the twin.

The library is open source; the platform's APIs and services are commercial cloud products, with a developer site at developer.bentley.com.