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Dev tools · alternatives · 2026

24 alternatives to Qoord, a simple quantum circuit simulator

Hi! I built this to teach myself how a quantum circuit simulator works. It's about 1000 lines of Python, aiming to be understandable more than being fast or robust. It's not meant to compete with anything else - just a personal project to really get clear on the under-the-hood theory of qubits and quantum gates.

Qoord is a quantum circuit simulator written in approximately 1000 lines of Python. Designed for educational purposes, it prioritizes clarity and understandability over performance or robustness. It serves developers… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Qoord, a simple quantum circuit simulator launched in 2024; newer entries below may have overtaken it.

  1. 1

    Simulate reverse causality using quantum suicide. Contribute to karldray/quantum development by creating an account on GitHub.

    2016 · github.com · its alternatives →

  2. 2

    I wanted to make the simplest app to introduce myself and others to quantum computing. Introducing, Schrödinger's Coin. Powered by a simple Hadamard gate[0] on IBM quantum, with this app you can directly interact with a quantum system to experience true randomness. Thoughts? Could you see any use cases for yourself of this? Or, does it inspire any other ideas of yours? Curious what others on HN think! [0] https://en.wikipedia.org/wiki/Quantum_logic_gate#Hadamard_ga...

    2025 · quantum.orgsoft.org · its alternatives →

  3. 3

    This is a little toy project of mine that lets you simulate digital logic graphs. It was inspired by Minecraft's Redstone and the Piet esolang. It's got some serious drawbacks-- you write circuits as PNGs and simulate them with a Python interface. It's slow to run and slow to experiment with. And it is certainly difficult to use for people with any kind of color blindness. But despite that, I hope this can still be a fun toy!

    2022 · github.com · its alternatives →

  4. 4

    Python client SDK for the Qumulator quantum computing API - qumulator/qumulator-sdk

    Apr 2026 · github.com · its alternatives →

  5. 5
    QMsolve▲72

    Visualizing quantum physics with Python

    2021 · github.com · its alternatives →

  6. 6

    This has been a small labour of love for a few days. Just a fun idea I had to create a single qubit quantum circuit simulator with interactive 3D bloch sphere. Check out my blog post linked on the page for further introduction to quantum computing!

    2024 · dazkins.com · its alternatives →

  7. 7

    Inspired by games like Turing Complete/Virtual Circuit Board/Logic World, I tried to make a mix of aseprite and wiredworld/wired-logic, the idea being the user can build a digital circuit using a "fullstack" pixelart creation workflow. The circuit is just an image. The primitives are (i) connected wires which have undefined, 0 or 1 state during simulation (displayed brighter or darker in function of the state) and (ii) NANDs, which are little pixel triangles. During simulation the user can interact with any wire by clicking on it, toggling its state, which is cool for messing…

    2024 · github.com · its alternatives →

  8. 8
    Qubit▲11

    Qubit - Qubit Tester

    2025 · github.com · its alternatives →

  9. 9

    State-of-the-art quantum simulator

    2025 · qblaze.org · its alternatives →

  10. 10
    Qu ▲312

    Learn, invent and innovate electronics

    Dec 2025 · qumaker.com · its alternatives →

  11. 11

    I built a tiny 8-bit CPU simulator in Python to better understand how computers work at a low level. It visualizes registers, memory, and instructions in real-time, so you can actually see each operation as it happens. You can write simple assembly code and watch how the CPU executes it step by step. The project is mainly for learning and experimentation, but I’d love feedback or ideas for improvement.

    Oct 2025 · github.com · its alternatives →

  12. 12
    QOSim▲7

    Build,Simulate-Understand Quantum Computing Visually

    2025 · its alternatives →

  13. 13AQ
  14. 14

    Hi HN, I turned the freshly published paper “The Constructor Theory of Time” by David Deutsch and Chiara Marletto (arXiv, 13 May 2025) into an executable Python library. What you’ll find • One-to-one translation of the paper’s formalism: Substrates, Attributes, Tasks, Constructors, and task-algebra operators • Possibility / impossibility predicates and counterfactuals encoded exactly as defined • Test suite that mirrors every lemma and example (>95 % coverage, mypy-typed) • Reproductions of key results: time-keeping substrates, irreversibility proofs, quantum branching tasks, and a…

    2025 · github.com · its alternatives →

  15. 15

    Reproduce digital electronics in Python. Contribute to fgarci03/pylectronics development by creating an account on GitHub.

    2021 · github.com · its alternatives →

  16. 16

    Intuitive user interfaces for quantum computing - make it an accessible & business-available technology. We aim to build the standard for interaction with quantum systems.

    2017 · quantumgame.io · its alternatives →

  17. 17
    QU3▲133

    Quantum-safe MCP servers for private, verifiable inference

    2025 · its alternatives →

  18. 18

    Integrate quantum circuit into any pygame-based games.

    2025 · its alternatives →

  19. 19

    A digital logic simulation written in C. Contribute to rzscheck/logic development by creating an account on GitHub.

    2020 · github.com · its alternatives →

  20. 20
  21. 21

    The quantum computer game

    2016 · mequanics.com.au · its alternatives →

  22. 22

    Hey HN. I'm Colton (YC S21, ex-Acorns), one of the founders of Postquant Labs. My cofounder Richard is a cryptographer out of Draper Labs and DARPA. We're building Quip.Network, the first distributed quantum compute network. We just opened our testnet and wanted to share it here. The basic problem: quantum hardware is here and already competitive on certain optimization problems, but for most people, there's no way to access it. The machines cost millions and the hardware and research are gated by the companies who own them. Also, quantum providers regularly have machines sitting idle…

    Apr 2026 · quip.network · its alternatives →

  23. 23LQ
  24. 24

    An all new quantum computer IDE experience.

    2020 · elyah.io · its alternatives →

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