SimFlow

SimFlow is desktop software for computational fluid dynamics, taking work from mesh generation through post-processing. It suits engineers and researchers who want local control over simulation workloads; the full engine is included on every plan, but meaningful scale beyond a small free workload carries a steep annual price.

Overview

SimFlow runs on Windows, Linux, and macOS, including Apple Silicon, and simulations remain on the user’s hardware rather than in a cloud service. That is a useful fit for environments where data location matters, though local operation puts responsibility for computing resources on the user. An offline licensing option also serves secure environments.

It combines authoring tools, 3D visuals, offline access, and data export in a desktop CFD workflow. SimFlow Technologies, based in Warsaw, Poland, has presented the product since 2012.

Key features

• Full CFD workflow: Mesh generation through post-processing is covered, and each plan includes the full simulation engine without add-on modules. That makes plan choice about scale, seats, and support rather than unlocking physics modules.
• Computing flexibility: Jobs can run on a local cluster, remote server, or cloud. HPC-grade parallel computing has no per-core or hourly charges, which can make costs more predictable for users with access to suitable infrastructure. It does not remove the cost or operational burden of that infrastructure.
• File handling: CAD imports support STL, STEP, IGES, OBJ, and BRep; results export to VTK, Fluent, Tecplot, and Ensight. This range is useful when simulation inputs or outputs must move among established tools.
• Integrations: SimFlow integrates with ParaView, OpenFOAM, Docker, and Windows Subsystem for Linux, supporting workflows that use those tools alongside the desktop application.

Pricing

The Free plan costs nothing and has no signup, credit-card requirement, or time limit. It includes the full engine, but is capped at 200,000 mesh nodes and one CPU. That makes it a low-friction way to explore the workflow or handle small cases, not a substitute for the unlimited mesh and CPU capacity of the paid plans.

Professional costs 8,000 EUR / year for a single-seat license with unlimited mesh and CPUs, engineering support, and automatic updates. A 30-day free trial is available with no commitment required. It is the paid fit for an individual who needs larger workloads and engineering support; the annual cost is difficult to justify for occasional or modest simulation needs.

Enterprise costs 10,000 EUR / year and provides a floating license, priority assistance, and an offline license option, with unlimited mesh and CPUs. Its network license can be shared across one computer at a time, making it more suitable for a team sharing access than buying an individual seat for each user. It also offers a 30-day trial with no commitment. Perpetual licenses are available with one year of maintenance and optional yearly renewals.

Prices are listed in EUR, with USD, GBP, CHF, and PLN quotes available. Commercial plans add engineering and technical software support, training, and onboarding. The central trade-off is clear: the free tier has strict compute caps, while uncapped commercial use starts at 8,000 EUR / year.

Platforms

SimFlow is desktop software for Windows, Linux, and macOS, including Apple Silicon. It runs locally and supports offline access; jobs may also be sent to a local cluster, remote server, or cloud. AI remote computing is coming in 2026.

Who it's for

SimFlow is best suited to engineers, researchers, and organizations that need a desktop CFD workflow, control over where simulations run, and access to HPC-grade parallel computing without per-core or hourly fees. The free tier is sensible for limited cases or initial evaluation. Users needing unlimited mesh and CPU capacity, and particularly teams requiring floating or offline licensing, should consider a commercial plan. Those who only need occasional, small-scale simulation are unlikely to find the annual commercial price proportionate.

Pros and cons

• Pro: The full simulation engine is included across plans, so there is no add-on module cost to obtain broader physics coverage.
• Pro: Local data handling, offline access, and an offline license option suit users with secure or controlled environments.
• Pro: Unlimited mesh and CPUs on paid plans, with no per-core or hourly HPC charges, support larger workloads without those usage fees.
• Con: The free plan's 200,000-node and one-CPU limits rule it out for larger cases.
• Con: Paid plans start at 8,000 EUR / year, a substantial commitment for individuals with intermittent needs.
• Con: Professional is single-seat; teams needing shared access must move to the more expensive Enterprise floating license.

Alternatives

For a different physics simulation option, browse Physics Simulation Software.

• OpenSim is free and open-source, making it a candidate for users seeking a no-cost platform; downloading it requires a SimTK account.
• FeenoX is a free GNU GPLv3+ option for users comfortable without a graphical interface and targeting GNU/Linux; generic binaries omit MUMPS and MPI.
• COMSOL Multiphysics is a paid alternative with a free trial for readers comparing commercial simulation software.
• Xcos is free, open-source software distributed with Scilab for readers looking for a no-cost alternative.
• myPhysicsLab offers free browser simulations and downloadable offline versions, suited to readers who want browser-based simulation rather than SimFlow’s desktop CFD workflow.
• Open Source Physics is a free alternative available across web, desktop, and mobile platforms.
• FDTDX is free and open source for research, development, and commercial use, for readers seeking that licensing model on Linux or self-hosted systems.
• DynamicalSystems.jl is a free, open-source, community-built project for readers looking for a community-developed alternative.

Verdict

Choose SimFlow if you need a complete desktop CFD workflow, local or offline control, and uncapped mesh and CPU use without per-core or hourly computing charges. Its strongest case is for professional workloads and teams that can use the support or floating-license options; the main reason to look elsewhere is the high annual price, especially when a free alternative or SimFlow’s tightly capped free tier is enough.