PPolySim OS
Launch Studio

A free, browser-native alternative to MATLAB

Interactive simulation for students, engineers, and researchers — no install, no license. 390+ live tools spanning the toolboxes people actually use, plus a Simulink-style block simulator.

Launch the Studio — free →MATLAB vs PolySim →Simulink vs PolySim →

See it run

A few of the live simulators — every one runs in your browser, free.

Fluid
Double Pendulum
Attractors
Bode Plot
Dynamics
Bloch Sphere

MATLAB toolbox → PolySim, tool for tool

Find the MATLAB or Simulink capability you need on the left; open the free, interactive PolySim equivalent on the right.

Core & Linear Algebra

MATLAB is the “matrix laboratory.” Explore the matrix math it's named for — visually.

Numerical Methods

The core numerical routines — see the algorithms converge step by step.

Signal Processing Toolbox

FFTs, filters, and time–frequency analysis, live in the browser.

Control System Toolbox

Design and analyze feedback controllers — drag the poles, tune the gains.

Simulink

Wire a block diagram and run it — a free, browser-native Simulink alternative.

Image Processing Toolbox

Convolution, edges, morphology, and frequency-domain filtering on a live image.

Communications Toolbox

Modulation, constellations, and link performance under noise.

Statistics & Machine Learning

Fit, classify, and quantify uncertainty — with the math on screen.

Why teach and prototype in the browser

Frequently asked

Is there a free alternative to MATLAB?▾
Yes. PolySim OS runs 390+ interactive simulators in your browser for free — no install, no license, no account to start. It covers much of what MATLAB's core and toolboxes are used for in teaching, exploration, and prototyping: linear algebra, numerical methods, signal processing, control systems, image processing, communications, and machine learning.
Is there a free alternative to Simulink?▾
PolySim's Block Diagram Simulator lets you wire blocks — sources, gains, sums, integrators, transfer functions, and a scope — and run the model with a real RK4 solver, right in the browser. It's a free, browser-native alternative to Simulink for modeling and teaching dynamic systems.
Can I get the code out?▾
Every simulator exports its current setup as runnable Python, MATLAB, or Julia code with one click, so you can take your work into any environment.
Does PolySim replace MATLAB?▾
We're honest about this: PolySim is a free alternative for interactive exploration, teaching, and prototyping — not a certified replacement for MATLAB's validated production toolboxes. For accessible, instant, in-browser simulation, PolySim is often all you need; for certified engineering workflows, MATLAB still leads.
How much does it cost?▾
Local use is free forever. Optional paid plans add saving, cloud compute, exports, and an AI copilot — starting well below the cost of a MATLAB license.

MATLAB and Simulink are trademarks of The MathWorks, Inc. PolySim OS is an independent product and is not affiliated with or endorsed by MathWorks.