What it is
TAD Designer Lite is a space-based BIM tool for architectural design, intended for use from early design onward. Its flexible workflow lets users shape rough concepts into more detailed models, starting with 2D shapes and adding 3D attributes later. During design, users can query information such as areas and distances. The built-in ARDELA language can be used to create probes or add-ons for model analysis. TAD is not drafting software; the maker says designs can be exported to CAD and 3D software, including RenderMan-compatible renderers and POV-Ray. Listed supported formats include VRML 2, Virtualight and RenderMan. The maker describes Lite as intended for small and medium architectural offices, especially in developing countries. Work is saved on the user's computer or LAN. The maker says TAD adds a DRM signature to binary files to help protect models from misuse or copying. Support options include Discord community support, in-app context-sensitive help and online documentation. Lite is free to use, while the full version requires free teamTAD Discord membership; demo mode is available.
Who it suits. TAD Designer Lite is aimed at small and medium architectural offices, particularly in developing countries. It may suit designers who want to explore BIM models from early concepts and can use CAD software for drafting.
Good
- Begins with 2D shapes and allows later 3D attributes
- Queries design information such as areas and distances
- ARDELA supports probes and model-analysis add-ons
- Work stays on the user's computer or LAN
Watch for
- TAD is not drafting software
- Full version requires free teamTAD Discord membership
- Mac and Linux support is via WINE
- Construction documents are not supported
Verdict
TAD Designer Lite supports a flexible path from early space-based concepts toward more detailed BIM models. Its non-drafting workflow means users who need drafting must export to other software.
Plans and prices
| Plan | Price | Billed |
|---|---|---|
| TAD Designer Lite | $0 | — |
From TAD Designer's own pricing page, checked 30 Sept 2026. Every plan
What the maker publishes
- Analysis
- Users can query design information such as areas and distances during the design process. source
- Data protection
- The maker says TAD inserts a DRM signature into its binary files to protect users from others misusing or copying their models. source
- Design workflow
- It supports loose, flexible design that can be developed from rough concepts into more detailed models. source
- Drafting and exports
- TAD is not drafting software; the maker says users can export from TAD to CAD software and 3D software, including RenderMan compatible renderers and POV-Ray. source
- Founded
- 1989 source
- Headquarters
- Navi Mumbai, Maharashtra, India source
- History
- The maker says TAD originated in a small architect's office in India in 1989. source
- Intended users
- The maker describes TAD Designer Lite as intended for small and medium architectural offices, especially in developing countries. source
- Local storage
- The maker says all work is saved on the user's own computer or LAN. source
- Modeling
- Designs can begin as 2D shapes and later receive 3D attributes. source
- Platforms
- The requirements page lists Windows XP or later and says TAD also works on Linux, Macintosh, and Chromebooks with WINE. source
- Purpose
- TAD Designer Lite is a space based BIM tool for architectural design, intended for use from early design stages onward. source
- Scripting
- The built in ARDELA language lets users create probes or add-ons for model analysis. source
- Support
- The maker directs users to community support on Discord, in-app context-sensitive help, and online documentation. source