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A/B Testing High complexity

VWO

by VWO

Sets cookies
Yes
Sends PII
No
Cross-site tracking
No
Consent required
Analytics
Transfer mechanism
Standard Contractual Clauses
Cookies
_vwo_uuid_v2_vis_opt_exp_XXXXX_combi_vis_opt_s_vis_opt_test_cookie

Overview

A/B testing and conversion optimisation platform (Visual Website Optimizer) by Wingify. Provides A/B testing, multivariate testing, split URL testing, and personalisation. Uses a visual editor for creating test variations without code changes. Merged with AB Tasty in January 2026 under Everstone Capital.

Detection Capabilities

Signature count
2
Detection methods
pagenetwork

Performance Impact

Performance Impact

Script size
70 KB
Requests per page
1

Common Mistakes

  • 1 Running the VWO SmartCode before consent, which modifies page content and sets cookies immediately
  • 2 Not distinguishing between functional A/B tests and personalisation experiments in consent settings
  • 3 Using VWO's heatmap and session recording features without obtaining appropriate consent for those features

Compliance Considerations

Collects visitor identifiers, experiment assignments, and conversion events. The VWO SmartCode modifies page content to show test variations. Basic A/B testing for site optimisation may operate under legitimate interest. Personalisation features that build visitor profiles require analytics consent. VWO sets first-party cookies for visitor identification.

Related Services

AB Tasty

A/B Testing

High AB Tasty

AB Tasty is an experience optimisation platform that provides A/B testing, multivariate testing, feature flagging, and personalisation capabilities. It enables marketing and product teams to run experiments on website content, layouts, and user flows without requiring code deployments. AB Tasty's client-side JavaScript tag modifies the DOM in real time to deliver test variations, which means it executes before page content renders and has access to the full page context. The platform is headquartered in France and is commonly deployed by European organisations, particularly in retail, financial services, and travel sectors where conversion optimisation is a commercial priority.

6 detection signatures

Dynamic Yield

A/B Testing

Med Dynamic Yield

Experience optimisation platform owned by Mastercard. Provides A/B testing, personalisation, and product recommendations using machine learning. Collects user behaviour to deliver individualised content and product experiences.

2 detection signatures

Kameleoon

A/B Testing

Med Kameleoon

A/B testing and feature management platform headquartered in France. Provides server-side and client-side experimentation, personalisation, and feature flags with AI-powered targeting and audience segmentation.

2 detection signatures

Optimizely

A/B Testing

Med Optimizely

Experimentation and feature management platform. Provides A/B testing, multivariate testing, feature flags, and personalisation. Processes visitor data to assign experiment variations and measure conversion outcomes.

2 detection signatures

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