Blog of Rob Galanakis (@robgalanakis)

Who is using PyPy?

I brought up the idea of using PyPy for an internal service we are building at work, and was asked what actual projects are using PyPy? I had no answer and couldn’t find one. Are there are well known projects using PyPy? Do you know of anyone that is using it to run small servers, even? I find PyPy hugely exciting, and I know it’s current limitations and issues (as well as its benefits), but I’m wondering if anyone’s used it yet and what their experience has been.

7 thoughts on “Who is using PyPy?

  1. James Mills says:

    Hi Rob,

    We use PyPy for some data processing internally (I believe) where I work at Griffith University’s[1] eResearch Services department[2]. I can’t say exactly what the project entails or precisely how it’s used because I’m not on that particular project — but at least we do use PyPy for some small definition of “use” :)



  2. Jean-Paul Calderone says:

    PyPy is used to run the DNS server for It is also used to run part of the web site (static and non-trac dynamic content; it does not run trac) and a couple other miscellaneous services.

  3. Dan Stromberg says:

    I do most of my backups using pypy running backshift:

  4. We are currently planning to use PyPy for our book scanning software ( The plan is to run it on a Raspberry Pi, where CPython performance while not tragically bad is still quite lacking and are hoping to improve on that by using the ARM version of PyPy.
    The software is mainly a Flask web application.

  5. Adam says:

    Armin and Maciej have set up a consulting company to provide support for pypy. They interviewed the developer of uWSGI who uses pypy at his company:

  6. Mack says:

    When I originally commented I seem to have clicked on the -Notify me when
    new comments are added- checkbox and from now on whenever a comment is added I get 4 emails with the same comment.
    Perhaps there is an easy method you can remove me from that service?
    Thanks a lot!

    1. Hi Mack, I’ve disabled the plugin and will try a different one. Clearly there’s something broken, I’m sure you weren’t the only person getting spam! If you get the option to subscribe via email in the future, please try it out and see what happens, as it should be using a different plugin.

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