CATIA vs Doorstop

CATIA is a parametric modeling and engineering product with tools for assembly design, sheet-metal work, and surface modeling. It supports cloud collaboration. Platform availability depends on the CATIA product: browser applications run on the 3DEXPERIENCE platform, while CATIA V5 sheet-metal software is available for Windows. File format support also varies by product. STEP import and export are listed, while DXF, STL, VRML, and IGES are supported by other CATIA V5 products. CATIA is paid, with pricing on request. Buyers should match the intended modeling work, collaboration needs, platform, and file exchange requirements to the specific CATIA product. Its web and Windows listings do not mean that every CATIA capability is offered on both platforms.

Doorstop manages textual requirements alongside source code in version control. It stores requirements and other linkable items as YAML files in directories that form documents, then organizes those documents into a tree and can validate traceability across it. It publishes document hierarchies and trace matrices as plain text, HTML, LaTeX, or Markdown; templates can shape output, and HTML and LaTeX publishing use them. Requirements can be imported or exported as YAML, CSV, TSV, or Excel files. Doorstop requires Python 3.10 or later and Git or another version control system, and it can be added to a Poetry project. It runs on Linux, macOS, and Windows, with API and self-hosted options, including standalone web-server or WSGI deployment. An experimental desktop GUI handles basic editing. The tool is free at free and licensed under LGPLv3. Baseline support and version history are listed, but approval workflows are not.