TopOpt
TopOpt: A free, research-oriented toolkit for interactive 2D and 3D topology optimization. Ranked #8 of 20 in Generative Design Software by our editors (7.9/10); pricing: Free plan; best for free interactive topology optimization.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forFree interactive topology optimization
- Free planYes
- Paid fromFree
- Founded1829 · Kongens Lyngby, Denmark
- Facts checked21 Sep 2026
Where it wins
- Free interactive 2D and 3D topology optimization
- Multiple load cases, gravity, and passive solid or void elements
- MATLAB, Python, PETSc, COMSOL, and Grasshopper integrations
Where it doesn't
- More a collection of apps and codes than a conventional SaaS product
- Manufacturing workflow coverage is narrower than its optimization scope
- Advanced workflows may require MATLAB, Python, C/C++, or research codes
Our verdict on TopOpt
TopOpt is a free collection of topology-optimization applications, research codes, and frameworks from DTU Mechanical Engineering and DTU Compute. It is suited to engineers, researchers, educators, and students who need to explore minimum-compliance designs in 2D or 3D. Interactive controls cover loads, supports, volume fractions, and mesh settings, while the collection also includes tools for shape optimization, buckling, contact analysis, photonics, and de-homogenization.
The free plan includes interactive topology-optimization apps plus MATLAB, Python, C/C++, and research codes. Its standout capability is the ability to adjust design conditions while observing optimization progress, with support for multiple load cases, gravity loads, and passive solid or void elements. TopOpt also combines topology and shape optimization and supports optimized-structure export for 3D printing. A parallel PETSc framework extends the collection toward large-scale topology optimization.
TopOpt fits a broad technical ecosystem: it runs across web, Windows, macOS, Linux, iOS, and Android, and integrates with MATLAB, Python, PETSc, COMSOL, and Grasshopper. That breadth favors users who are comfortable moving between interactive apps, code examples, and research frameworks. It is less suitable for buyers seeking a conventional commercial SaaS workflow or a broad manufacturing platform. Choose TopOpt for free, technically deep optimization exploration; consider an alternative when production-oriented manufacturing features are the priority.
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TopOpt pricing
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TopOpt fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Manufacturing constraints | Not verified |
| Simulation integration | Yes |
| Native CAD integration | Yes |
| Cloud processing | Not verified |
| Optimization methods | Topology |
| Supported processes | Not verified |
| Design study limit | Not verified |
| Deployment | Cloud, Desktop, Mobile |
| Platforms | Web, Windows, macOS, Linux, iOS, Android |
| Support | Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 5 integrations: MATLAB, Python, PETSc, COMSOL, Grasshopper See all → |
| Pricing | Free plan (source) |
| Website | topopt.mek.dtu.dk |
| Facts checked | 21 Sep 2026 |
TopOpt integrations
TopOpt lists 5 integrations on its own site.
- MATLAB
- Python
- PETSc
- COMSOL
- Grasshopper
Alternatives to TopOpt
- Ansys DiscoveryInteractive modeling, simulation, and topology optimization for early engineering design.9.3
- OrCAD XA broad electronics design suite for teams that need simulation, PCB layout, and ECAD/MCAD workflows.9.1
- PlatoAn open-source Linux tool for physics-coupled topology and shape optimization research.8.9
TopOpt vs the competition
- TopOpt vs Ansys Discovery
- TopOpt vs OrCAD X
- TopOpt vs Plato
- TopOpt vs CATIA
- TopOpt vs Ansys optiSLang
- TopOpt vs SIMULIA Tosca
Compare TopOpt with any tool side by side →
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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used TopOpt for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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