GAE/Bingo, A/Bingo split testing for App Engine & Khan Academy

In plain words

GAE/Bingo is an open-source A/B testing library for Python applications running on Google App Engine. Built for Khan Academy, it enables developers to set up split tests in minutes while handling hundreds of requests per second with minimal performance impact. The tool maintains user identities as people log in, stores experiment results to the datastore automatically, and works well at production scale.

written from the facts on this page · September 2026

From the sources

Continuing my trend of straight-up copying the work of the smartest people I know, I recently decided to tackle Khan Academy's A/B testing problem (we didn't have any A/B testing) by bringing Patrick...

In the maker’s words, at launch

We just open sourced GAE/Bingo, a re-imagining of patio11's A/Bingo for use in App Engine (w/ his approval). The lib was built for Khan Academy, where it's currently serving up A/B tests at a few hundred requests/second w/ minimal page load drag. It should get anyone on App Engine (python) up and running and A/B…

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