DWSIM
DWSIM: A flexible process simulator for teams that want desktop modeling without a license fee. Ranked #7 of 15 in Chemical Software by our editors (6.9/10); pricing: Free plan; best for teams wanting free, flexible process simulation.
At a glance
- Editor score6.9 / 10
- PricingFree plan
- Best forTeams wanting free, flexible process simulation
- Free planYes
- Paid fromNone
- SDS managementNo
- Facts checked24 Sep 2026
Where it wins
- Models flowsheets with thermodynamic packages and unit operations
- Supports both steady-state and dynamic simulation
- Runs on Windows, macOS, Linux, and Android
Where it doesn't
- Focused on simulation, not chemical inventory or SDS management
- No built-in formulation management or regulatory compliance
- Documentation and community are the listed support channels
Our verdict on DWSIM
DWSIM is a free, open-source chemical process simulator for engineers, educators, and researchers who need to model process flowsheets. It combines thermodynamic property packages with unit-operation simulation, and supports both steady-state and dynamic simulation. Its local desktop distribution suits teams that prefer running software on their own devices rather than relying on a hosted service. Versions are available for Windows, macOS, Linux, and Android, making it a fit for varied device environments.
Simulation depth is the central reason to consider DWSIM. CAPE-OPEN interoperability lets it work with compatible components, while Python scripting and automation add options for extending or automating work. Those capabilities make it more flexible than a simulator limited to a single modeling mode or fixed workflow. However, DWSIM is focused on process simulation: it does not provide chemical inventory, safety data sheet management, formulation management, or regulatory compliance features. Teams seeking those functions should look at a separate chemical management product.
The published offering is a single Free / open source plan, distributed as downloadable desktop software; there are no paid tiers to compare. Source code is publicly available, and the project provides documentation and community resources for installation and use. Support is centered on those channels rather than a listed dedicated support service. DWSIM is a strong fit for individuals and teams across company sizes that prioritize simulation flexibility and a free, locally run tool. It is less suitable for buyers seeking an integrated compliance or inventory system, or hosted software with dedicated support.
DWSIM pricing
All 1 DWSIM plans and prices →
DWSIM fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| SDS management | No |
| Chemical inventory | No |
| Formulation management | No |
| Regulatory compliance | No |
| Deployment | On-premises |
| Mobile access | Yes |
| Deployment | Desktop, Mobile |
| Platforms | Windows, macOS, Linux, Android |
| Support | Docs, Community |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 1 integrations: CAPE-OPEN |
| Pricing | Free plan (source) |
| Website | dwsim.org |
| Facts checked | 24 Sep 2026 |
DWSIM integrations
DWSIM lists 1 integrations on its own site.
- CAPE-OPEN
Alternatives to DWSIM
- AVEVA PRO/II SimulationA detailed process simulator for engineers modeling steady-state plant operations.9.0
- BIOVIA COSMOtherm (COSMO-RS)A specialized COSMO-RS tool for predicting molecular properties in pure and mixed liquids.8.2
- IUCLIDFree dossier software for chemical-substance data and regulatory preparation.7.7
DWSIM vs the competition
- DWSIM vs AVEVA PRO/II Simulation
- DWSIM vs BIOVIA COSMOtherm (COSMO-RS)
- DWSIM vs IUCLID
- DWSIM vs BIOVIA Workbook
- DWSIM vs UL WERCS Studio
- DWSIM vs ProMax
Compare DWSIM with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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