What we do
We build free calculators for the parts of A/B testing people most often get wrong (sample size, test duration, split checks, significance) and write guides that explain the reasoning in plain language. Everything runs in your browser.
The site is written for people who run tests without a statistician on hand: store owners, marketers, product managers, and social media teams comparing posts on X.
How we write and check
- Formulas are published. Every calculator explains its method, and the methodology page lists them in one place.
- Results are tested. Each build of the site runs automated tests that compare our calculations with independent reference values from statistical software and published results.
- Claims are sourced. Where a page describes another company's product, we link to the vendor's own pages or reputable reporting and date the check.
- No invented proof. No testimonials, user counts, awards, logos of "clients" or case studies we can't verify.
Pages are written and maintained by the ABFinal Editorial team. When something is wrong, tell us at contact@abfinal.com and we'll fix it.
Independence
ABFinal has no investors, sponsors, affiliate deals or paid partners. We don't sell data because we don't collect it. Comparison pages aren't paid for by the vendors they cover.
About this domain
abfinal.com was previously the home of "AB Final", a paid A/B testing app for Shopify stores, run by a different team. That app is not connected to the current site. We kept many of the old addresses working and rewrote what's behind them from scratch, so old links lead somewhere useful. We can't help with accounts, billing or data from the old app.
ABFinal is not affiliated with Shopify, Meta, Snap Inc., X Corp., Optimizely, Wingify (VWO, AB Tasty), Webflow or Mutiny.