Based on our record, ABRouter seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Doing A/B testing at the reverse-proxy level is just one way - a pretty niche one, too - of doing A/B testing. Since we're in /r/PHP, here is a link to ABRouter - a self hosted, open source tool that has nothing to do with a reverse proxy. Source: about 1 year ago
Optimizely - A/B testing you'll actually use.
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