BuildFreely vs Bulldog Steel Structures Designer: Which Should You Use?
The verdict
BuildFreely and Bulldog Steel Structures Designer are both home & construction design tools, compared here side by side. BuildFreely is truly free (Free) and runs in any web browser with nothing to install; Bulldog Steel Structures Designer is free, brand-locked (Free) and runs in any web browser with nothing to install. The biggest difference is cost: BuildFreely is truly free, while Bulldog Steel Structures Designer is free, brand-locked (from Free).
Free tiers & pricing last verified Jun 23, 2026.
Pick BuildFreely if…
Truly freeDIYers wanting framing-accurate shed plans
Pick Bulldog Steel Structures Designer if…
Free, brand-lockedVisualizing a custom steel garage before quoting
Side by side
BuildFreely
Truly freeFree CAD tool generating a 3D model, plans, bill of materials, and cost estimate from your parameters; one-story rectangular gable/shed roofs only.
Bulldog Steel Structures Designer
Free, brand-lockedFree 3D carport/garage design tool with live price changes; you save and submit for a quote rather than checkout.
Read the full reviews
BuildFreely
Free CAD tool generating a 3D model, plans, bill of materials, and cost estimate from your parameters; one-story rectangular gable/shed roofs only.
Bulldog Steel Structures Designer
Free 3D carport/garage design tool with live price changes; you save and submit for a quote rather than checkout.
BuildFreely vs Bulldog Steel Structures Designer: questions, answered
What is the main difference between BuildFreely and Bulldog Steel Structures Designer?
The biggest difference is cost: BuildFreely is truly free, while Bulldog Steel Structures Designer is free, brand-locked (from Free).
Is BuildFreely or Bulldog Steel Structures Designer free?
BuildFreely is truly free and Bulldog Steel Structures Designer is free, brand-locked. BuildFreely: Free CAD tool generating a 3D model, plans, bill of materials, and cost estimate from your parameters; one-story rectangular gable/shed roofs only. Bulldog Steel Structures Designer: Free 3D carport/garage design tool with live price changes; you save and submit for a quote rather than checkout.