Top A/B Testing & CRO

Experimentation and personalisation platforms, judged on statistical rigour, performance impact on the page and cost at traffic.

Platforms analysed: 8
Last updated: 1 Sept 2026
Methodology: TOP SCORE™ 1.1
Data confidence: 18 high16 medium

Organic ranking

Top A/B Testing & CRO

Ranked by TOP SCORE™. Not for sale.

Sort byTOP SCORE External Reputation AI Authority Web Authority Expert Score TOP10 User Score

Confidenceall high medium

Convert Experiences

Self-serve A/B testing and personalisation for agencies and ecommerce

TOP SCORE

51/100

no change

CRO agencies running many client sites on the Pro plan, and EU or privacy-constrained small/mid-market teams that want German data residency, published pricing and fast human support without an enterprise procurement cycle.

AI Authority40

External Reputation76

Web Authority14

Expert Score70

TOP10 Users—

View profile Compare Official site ↗USD $299/mo billed annually ($3,588/yr) or $399/mo billed monthly — Growth plan, 100K tested users/month · free tier: 15-day free trial, no credit card required, with premium feature accessMedium confidence

AB Tasty

Enterprise experimentation, feature flags and AI personalization platform

TOP SCORE

51/100

no change

Mid-market to enterprise e-commerce, retail, luxury, travel and media brands in Europe or North America with meaningful traffic, an in-house CRO or product team, a two-month implementation runway, and a need to combine client-side testing with server-side feature flags and personalization under one contract — especially where EU data residency or a strict Content-Security-Policy is required.

AI Authority37

External Reputation81

Web Authority9

Expert Score71

TOP10 Users—

View profile Compare Official site ↗Not published · free tier: None — no free trial and no free version; the vendor offers only a supervised free proof of concept lasting typically 1-2 weeksMedium confidence

Statsig

Experimentation, feature flags, analytics and replay on one data layer

TOP SCORE

50/100

no change

Engineering- or data-led product organisations running continuous experimentation at volume that want flags, experiments, analytics and replay on one data model, and either fit within the free 2M events or have scale to negotiate an Enterprise contract.

AI Authority13

External Reputation79

Web Authority35

Expert Score73

TOP10 Users—

View profile Compare Official site ↗$150/month (Pro) · free tier: Developer: free, no credit card — 2M metered events/month, unlimited flag & config checks, 50,000 session replays/month, A/B tests, feature flags, product and web analytics, 1-year analytics retention, unlimited seatsHigh confidence

Amplitude Feature Experimentation

Feature flags and experimentation built into Amplitude analytics

TOP SCORE

46/100

↑3.1

Mid-market product and engineering teams already committed to Amplitude analytics whose main need is safe flag-gated releases plus a small number of high-value experiments measured against existing event data — and who will negotiate experimentation add-ons into the initial contract.

AI Authority17

External Reputation62

Web Authority49

Expert Score59

TOP10 Users—

View profile Compare Official site ↗Plus: "Starts at $0" — first 2M events/month free, credit card required, scales to 70M events · free tier: Free plan: 2M events/month forever, no credit card required, includes limited experiments, Guides & Surveys and 10K monthly session replaysHigh confidence

Kameleoon

Enterprise experimentation, AI personalisation and feature management in one platform

TOP SCORE

46/100

no change

Mid-to-large enterprises in regulated or privacy-sensitive sectors — healthcare, financial services, EU-based ecommerce — that want experimentation, personalisation and feature management in one contract, have developer capacity, and value EU data residency plus hands-on vendor support.

AI Authority16

External Reputation73

Web Authority23

Expert Score71

TOP10 Users—

View profile Compare Official site ↗From $495/month (PBX Starter; listed as €495/month by Software Advice and Capterra) · free tier: PBX Starter free trial — 30 days, no credit card required, build up to 3 experimentsHigh confidence

Webtrends Optimize

All-inclusive A/B testing and personalisation platform with UK support

TOP SCORE

42/100

no change

UK/EU mid-market CRO teams with at least one technical owner who want every feature included in one licence and optional managed delivery, and small sites under 10,000 sessions/month who can use the free tier.

AI Authority0

External Reputation76

Web Authority18

Expert Score75

TOP10 Users—

View profile Compare Official site ↗Not published — all vendor plans read 'TBC pricing on request' (a third-party Capterra listing shows £179/month flat rate, uncorroborated) · free tier: Free for sites under 10,000 sessions/month with no stated feature limitations; plus a 30-day trialHigh confidence

LaunchDarkly

Feature-flag platform with engineering-led full-stack experimentation

TOP SCORE

41/100

no change

Engineering-led product organisations already shipping behind feature flags that want server-side, mobile and AI-agent experimentation attached to the release mechanism, with results computed in their own warehouse and broad read access without seat fees.

AI Authority14

External Reputation72

Web Authority9

Expert Score68

TOP10 Users—

View profile Compare Official site ↗Foundation: pay-as-you-go from $10 per service connection/month plus $8.33 per 1K client-side MAU/month on annual billing ($10/1K listed in the comparison table); no platform or seat fees; 14-day trial · free tier: Developer: $0/month forever, no credit card; unlimited seats and flags, 100K experimentation MAU/month, 1K client-side MAU, 5 service connections, 10M logs and 10M traces, 5K session replays, 5K errors, 5,000 AI runs, 1 project / 3 environments, Discord community supportMedium confidence

Optimizely Web & Feature Experimentation

Enterprise A/B testing and feature flagging suite

TOP SCORE

37/100

no change

Cannot be determined from verified evidence; on the unverified structural claims, large digital organisations with dedicated experimentation teams and budget for a quote-based enterprise contract.

AI Authority56

External Reputation—

Web Authority9

Expert Score43

TOP10 Users—

View profile Compare Official site ↗Not published · free tier: Not publishedMedium confidence

How this category is scored

Every platform here is scored against the same five components. The Expert Assessment component uses a rubric written specifically for a/b testing & cro.

Core Capability
How well it does the job it is bought for.
Measurement & Attribution
Quality and honesty of reporting and attribution.
Automation
Depth of workflows, triggers and audience logic.
Deliverability & Reach
Whether the work actually lands where it should.
Pricing at Scale
What it costs as contacts, seats or spend grow.
Integrations
CRM, commerce and data-warehouse connectivity.
Support & Onboarding
Implementation help and ongoing support quality.

Sources currently active: Product Hunt, Apple App Store, Google Play, Vendor Documentation, TOP10 Editorial Research, TOP10 AI Visibility Panel, TOP10 Citation Discovery, TOP10 Ratings Refresh, VIZS AI Visibility, TCS Citation Intelligence, G2, Trustpilot, Capterra, TrustRadius, Software Advice. How sources are weighted.