SimFlow

SimFlow is desktop software for computational fluid dynamics, taking a project from mesh generation through post-processing. It suits engineers and researchers who want to run simulations on local or remote computing resources while keeping control of where their data resides. Its full simulation engine is included across plans, but commercial access carries a substantial annual price.

Overview

SimFlow runs locally on Windows, Linux, and macOS, including Apple Silicon; it is not a cloud-based service. Simulations stay on the user's hardware, and a fully offline license option supports secure environments. The Free plan has no signup, credit-card, or time requirement, making it an accessible way to explore the workflow, though its mesh and CPU caps rule out larger workloads.

Every plan includes the full simulation engine, with no add-on modules or feature gating. That makes the plan choice about scale, licensing, and support rather than access to different physics modules.

Key features

• End-to-end CFD workflow: SimFlow covers mesh generation through post-processing on desktop. Authoring tools and 3D visuals are included, giving users a single environment for the stated workflow.
• Computing flexibility: Jobs can run on a local cluster, remote server, or cloud. HPC-grade parallel computing carries no per-core or hourly charges, a useful distinction for users with access to computing infrastructure who need to avoid usage-based fees. AI remote computing is coming in 2026.
• File compatibility: CAD import supports STL, STEP, IGES, OBJ, and BRep; results export to VTK, Fluent, Tecplot, and Ensight. Integrations with ParaView, OpenFOAM, Docker, and Windows Subsystem for Linux connect the workflow to those tools.
• Team licensing: Enterprise has a floating license shareable across a network, one computer at a time. That better fits shared workstations than Professional's single-seat license.

Pricing

SimFlow is freemium, with prices in EUR and USD, GBP, CHF, and PLN quotes available. Commercial plans include a 30-day free trial with no commitment required.

Free is the practical starting point for small-scale evaluation, not a substitute for commercial capacity: both the 200,000-node ceiling and single CPU constrain the size and parallelism of work. Professional removes those caps and adds engineering support and automatic updates, but its single seat is intended for one user. Enterprise costs more for shared network licensing, priority assistance, and offline licensing, which are more relevant to teams and secure environments. Perpetual licenses are also available with one year of maintenance and optional yearly renewals; custom pricing applies.

Platforms

SimFlow is desktop software for Windows, Linux, and macOS, including Apple Silicon. Offline access and a fully offline license option support operation in disconnected or secure environments. The software also supports jobs on local clusters, remote servers, or cloud resources, while simulations remain on the user's hardware.

Who it's for

SimFlow is best suited to engineering and research users who need a complete desktop CFD workflow, control over simulation data, and access to parallel computing without per-core or hourly fees. Organizations that need shared licensing or offline licensing have a reason to consider Enterprise. It is a poor fit for casual users or anyone who needs substantial compute capacity at low cost: the Free tier is capped, and paid plans begin at 8,000 EUR / year.

Pros and cons

Pros

• Full engine on every plan: users do not have to buy add-on modules to access the simulation engine.
• Local data control: simulations stay on the user's hardware, with an offline license option for secure environments.
• No usage-based HPC fees: parallel computing has no per-core or hourly charges.
• Broad file and tool support: specified CAD imports, result exports, and integrations support varied workflows.

Cons

• Free capacity is narrow: 200,000 mesh nodes and 1 CPU limit the Free plan's usefulness for larger or parallel workloads.
• Commercial entry price is high: Professional starts at 8,000 EUR / year, making it costly for occasional or budget-constrained users.
• Professional is single-seat: teams that need shared use must look to the more expensive Enterprise plan.

Alternatives

Consider OpenSim if a free and open-source platform better suits your needs; it is available across API, Linux, macOS, and Windows, though downloading it requires a SimTK account. ngspice is a free circuit simulator for users comfortable with command-line or file-based input rather than schematic entry. Choose Xcos if you want free, open-source software distributed with Scilab on Windows, macOS, or Linux. FeenoX is a free GNU GPLv3+ option for users who can work without a graphical interface; it targets GNU/Linux, and generic binaries omit MUMPS and MPI. MPTRAC is a free, GPLv3 option for Linux, with installation from source or binaries and a browser-based Web Runner. FEST-3D is available under GPLv3 for Linux and macOS. FDTDX is a free open-source option for research, development, and commercial use on Linux or self-hosted setups. DynamicalSystems.jl is a free, open-source, community-built project for Linux, macOS, and Windows. Browse Physics Simulation Software for more options.

Verdict

Choose SimFlow if you need a full desktop CFD workflow, local data control, and uncapped mesh and CPU access without per-core or hourly computing fees. Its strongest case is the combination of complete workflow and flexible computing; its clearest reason to look elsewhere is the 8,000 EUR / year starting price, especially if your work fits within a tightly capped free plan or calls for a different kind of simulation software.