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In the landscape of Computer-Aided Process Engineering (CAPE), process simulation tools are vital for designing, optimizing, and operating complex chemical plants. Historically, this space has been dominated by prohibitively expensive, proprietary software suites like Aspen Plus, Aspen HYSYS, and PRO/II. However, the landscape has fundamentally shifted with the introduction of , a commercial sibling to the highly successful open-source DWSIM platform.

Standard simulators often struggle with acid gas scrubbing or water treatment. DWSIM Pro includes advanced electrolyte models that automatically account for ionic species formation in aqueous solutions.

Dedicated SLAs, direct developer support, and priority bug fixes Limited / Manual configuration required Native web-based execution and cloud API integration Security & Intellectual Property Public domain code modifications

DWSIM Pro: Bridging Open-Source Simulation and Enterprise-Grade Analytics dwsim pro

DWSIM Pro follows a transparent, modular pricing model. While the exact cost can vary based on selected features and subscription length, the entry point is highly accessible. As of early 2025, pricing for a monthly subscription starts at , plus applicable VAT. For reference, some third‑party resellers have advertised starting plans at €35.69 per month . This pricing model is designed to be accessible to a wide range of users, from individual consultants to small and medium‑sized enterprises (SMEs), eliminating the need for large, upfront capital investments.

DWSIM Pro is a versatile tool deployed across various sectors of the process industries:

Enterprise-grade encryption, secure hosting, and IP protection Community-driven updates (may vary in stability) Extensively tested, stable LTS (Long-Term Support) builds Collaboration Tools Local file sharing Multi-user collaboration and cloud-saved flowsheets Core Features of DWSIM Pro

DWSIM Pro: Bridging the Gap Between Open-Source and Enterprise Process Simulation 👉 Download DWSIM Pro today and start simulating

, providing engineers the flexibility to model both continuous routine production and time-dependent process controls.

Unlike the community-driven open-source version, Pro users have access to private, dedicated technical support to troubleshoot flowsheet issues or software bugs.

| Feature | DWSIM (Open-Source) | DWSIM Pro (Commercial) | | :--- | :--- | :--- | | | Free, GPLv3 | Paid, Named User License | | Pricing | Completely Free | Starts at €29.99/month for hourly packages | | Access | Local installation on user's machine | Browser-based access, hosted on Simulate365 cloud servers | | Support | Public forum support | Personal private support included | | Extended Features | Standard set of unit ops and thermo packages | 50+ additional features, including bidirectional solver, advanced thermo models, and specialized unit ops | | Simulate 365 Dashboard | Free access | Free access | | Python Scripting | Supported | Supported, with access to SciPy libraries |

DWSIM Pro is hosted in the cloud, allowing for easier collaboration and accessibility across different devices and locations. Standard simulators often struggle with acid gas scrubbing

DWSIM Pro builds upon the open-source foundation created by Daniel Medeiros, adding critical tools for commercial process development. Key features include:

: Hosted on the Simulate 365 platform, it allows users to run simulations directly in a web browser without local installation [6, 7].

DWSIM Pro is, without doubt, a highly cost-effective alternative to mainstream commercial simulators. A comparative study published in the journal Bioresource Technology found that DWSIM Pro provides results comparable to Aspen Plus for material and energy balances, with differences typically within 2–10%. More importantly, the study concluded that DWSIM Pro represents a significantly more accessible and affordable tool for conducting techno-economic analyses, particularly for bio-processes and smaller enterprises. The flexible pricing model, starting from €29.99 per month for hourly work packages, further lowers the barrier to entry.