About Variant Notebook

Variant Notebook is a small editorial site about experimentation on websites: which tools exist, what they cost, and how to read the results without fooling yourself. We write for marketers, product managers and engineers who have to pick a tool or defend a result. We cite primary pages where we can, and we label vendor-published claims as vendor claims. BusinessMCP is referenced in several examples because its product pages are public and specific, for instance its automated A/B testing feature, but we also cover competitors and say where it does not fit. We do not run tests for readers and nothing here is professional advice. Check current pricing and terms with each vendor.