Bonsai review
Broad openBIM coverage at no software cost, with a desktop-only workflow.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Bonsai is a free, open-source BIM add-on for Blender built around IFC as its native data structure. It is aimed at architects, engineers, construction professionals, facility managers, and other AEC teams working with openBIM processes. The product runs on Windows, macOS, and Linux, and covers both model authoring and exploration rather than focusing only on model viewing. Its free availability makes it particularly relevant for practitioners who need broad discipline coverage without a commercial software license.
Its main strength is breadth within an IFC-centered workflow. Bonsai includes 2D drawing generation, structural analysis workflows, MEP system modeling, construction scheduling with critical-path analysis, quantity extraction, cost schedules, clash detection, and facility-management or asset-data workflows. That combination gives multidisciplinary teams a single desktop environment for design, coordination, construction planning, and operational information. API access is also listed, which supports further technical extension, while the open-source model gives teams visibility into the software’s underlying approach.
The trade-off is that Bonsai is focused on desktop openBIM work. Mobile access is not part of the product’s coverage, and cloud collaboration is outside the stated workflow, so distributed teams seeking a vendor-hosted workspace may prefer another option. Its Blender add-on format also suits users comfortable working inside Blender more than teams seeking a conventional standalone BIM application. Choose Bonsai when native IFC, multi-discipline capability, and zero software cost matter most; consider an alternative when mobile review, cloud coordination, or a broader integration ecosystem is central to daily operations.
Bonsai pros and cons
- Where it wins
- Native IFC authoring with viewing and exploration
- Broad architecture, structural, MEP, scheduling, and FM coverage
- Built-in quantities, cost schedules, clash detection, and drawings
- Where it doesn't
- Desktop-only workflow with no mobile access
- Cloud collaboration is outside the stated workflow
- Blender-centered rather than a standalone BIM application
Bonsai fact sheet, pricing and score →
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