Source: https://mokxi.com/vs/digital Updated: 2026-10-04 Comparison # Mokxi and Digital, the logic simulator, compared fairly Mokxi is a free, browser-based alternative to Digital for logic lessons on machines that cannot install Java: gates, flip-flops, custom chips checked against truth tables, and a path from one NAND gate to a working computer. Digital, by Helmut Neemann, is a free, open-source logic designer and circuit simulator for teaching, a Java desktop program inspired by the original Logisim. Mokxi is a free circuit and firmware simulator in a browser tab, with a logic path of its own. Here is where each one is the right answer. Last checked September 2026 Start building free or see the plans - 228 parts on the bench - 31 boards running now - 1.00x real time, on every board Click to open it in the editor Running here on our own RISC-V core, on the machine in front of you. The Mokxi editor running the Kestrel, a CPU of about four thousand NAND gates, with its program in ROM and a terminal beside it. ## Where Digital leads These are the strongest reasons to choose Digital today. - Free and open source under the GPL-3.0, and it runs offline anywhere Java 8 or later runs. - Test cases stored with the circuit, and analysis that derives a truth table and expressions from a circuit, including circuits with flip-flops. - Components described in VHDL or Verilog, export to FPGA boards such as the BASYS3 and the TinyFPGA BX, and JEDEC files for GAL chips. - A library of the common 74xx chips, a finite state machine editor, and a measurement graph of signals over time. ## Where Mokxi leads These are working parts of Mokxi you can open and test for yourself. - Runs in a browser tab with nothing to install, so it works on a school Chromebook. - A path from one NAND gate to a computer, lesson by lesson: package any circuit as a chip, check it against its truth table, and build up to the Kestrel CPU running a program from ROM. - Real 74HC chips and a 555 on a 0.1 inch breadboard, and analog parts with bench instruments, beside the ideal gates. - Microcontrollers on the same canvas: 31 boards run real compiled C++, and classes add starters, checks, submissions and a gradebook. ## Side by side Last checked September 2026. If anything here has gone stale, that is our mistake and we want to know. | Mokxi | Digital Aimed at | Logic, breadboard circuits and firmware | Digital logic design and teaching Runs in | A browser tab, including on Chromebooks | A Java desktop program Price | Free; paid plans for classes and more room | Free and open source Testing a circuit | Truth-table checks in each lesson, row by row | Test cases stored with the circuit HDL and FPGA | No | VHDL and Verilog, with FPGA board export Offline | Keeps running once the tab is open | Yes, as a desktop program Sources for Digital - Digital on GitHub (license, Java, features) - Digital releases ## Which one should you use Straight answers. Where the other one is the right call, we say so. ### You are heading for an FPGA, or teaching VHDL or Verilog Digital. ### You want test cases that travel with a circuit file Digital. They are one of its core features. ### Your students are on Chromebooks Mokxi runs in the browser with nothing to install. ### You want a guided path from one NAND gate to a computer, with a teacher checking the work Mokxi. ## Compare the other options The same straight comparison for the tools teachers, students and makers also consider. Mokxi vs Tinkercad Circuits Mokxi vs Wokwi Mokxi vs Proteus Mokxi vs Fritzing Mokxi vs SimulIDE Mokxi vs Falstad (CircuitJS) Mokxi vs Multisim Mokxi vs LTspice Mokxi vs Logisim-evolution Mokxi vs CircuitVerse Mokxi vs Qucs-S Mokxi vs EveryCircuit Compare every simulator ## In short Should I use Mokxi if you are heading for an fpga, or teaching vhdl or verilog? Digital. Should I use Mokxi if you want test cases that travel with a circuit file? Digital. They are one of its core features. Should I use Mokxi if your students are on chromebooks? Mokxi runs in the browser with nothing to install. Should I use Mokxi if you want a guided path from one nand gate to a computer, with a teacher checking the work? Mokxi. ## Try it yourself A comparison page is somebody else’s opinion. Open the editor, press Run and make up your own mind. Start building free Open the editor Free forever. Every board and part. Saves your projects. Works on Chromebooks.