Onshape

Onshape (acquired by the massive PTC conglomerate) is a fiercely agile, profoundly revolutionary, and mathematically entirely browser-based SaaS platform. It operates as the absolute apex predator of "Pure-SaaS Real-Time 3D CAD." Even Fusion 360 requires a heavy local client installation. Onshape was engineered by the original founders of SolidWorks to mathematically execute the entire, terrifyingly heavy 3D parametric CAD engine entirely inside a standard Google Chrome web browser, requiring absolutely zero installation. The absolute core differentiator of Onshape is its "Google Docs-Style Real-Time 3D Collaboration." A team of 5 engineers can open the exact same 3D assembly in Chrome on their laptops. If Engineer A mathematically extrudes a cylinder by 5mm, Engineers B, C, D, and E mathematically see the 3D cylinder physically grow on their screens in exact real-time. There are no files. There is only a single mathematical database living in the cloud. Because it completely destroyed the massive IT headache of installing gigabytes of CAD software and managing massive local file servers (PDM), offering unparalleled pure-web performance, real-time collaboration, and extreme version control, it is heavily favored by agile hardware teams, remote engineering firms, and enterprise R&D labs.