Methodology
How this index is made
The reader we rank for is an online business, a merchant or the agency working for them, asking one question: which A/B testing tool will deliver measurable revenue impact at a defensible cost? We do not rank for feature-count, funding news or brand size.
Evidence rules
- Every factual claim links to a source we actually loaded, with an access date. No search-snippet facts.
- Where a vendor’s own pages contradict each other (it happens more than you would think), we say so instead of picking a side.
- What we could not verify is labeled unverified, and never rated as if it existed.
- Review-platform scores are only cited where we could load the page ourselves; several platforms block automated access, and we do not launder snippets into facts.
Ranking weights
| 25% | Statistics validity How hard the tool makes it to call a false winner: sequential or always-valid analysis, correction for multiple comparisons, sample-ratio-mismatch detection. |
| 25% | Commerce and checkout testing What you can actually test in a shop: install path, revenue tracking, checkout and price testing, post-purchase steps. |
| 20% | Platform breadth Server-side SDKs, feature flags, personalization and behaviour analytics from the same vendor. |
| 15% | Pricing transparency What a buyer can learn about cost before a sales call: published prices, quotas, trials, free plans. |
| 15% | Privacy and hosting Where visitor data lives, what gets written to the device, consent handling, certifications, data processing agreement. |
Updates
Facts are re-checked monthly; the full ranking is re-evaluated quarterly. Each page carries its last-reviewed date. Current edition: 2026-09-01.
Independence & disclosure
This site is operated by the company named in the imprint. We link to vendors directly and use no affiliate links. If a ranked vendor relationship exists, the imprint is the authoritative disclosure.