All testing tools

Amplitude

Session Replay

Behavioural product analytics with strong cohort and retention analysis.

LaunchDarkly

A/B & Flags

The enterprise feature-flag platform, with experimentation layered on top.

GrowthBook

A/B & Flags

Open-source feature flags and experimentation that runs on your data warehouse.

Heap

Session Replay

Autocapture analytics: every interaction is tracked, so you never miss an event again.

Matomo

Session Replay

Self-hosted web analytics with 100% data ownership and no sampling.

Maze

User Research

Rapid unmoderated testing on live products and Figma prototypes, with quantitative output.

Optimizely

A/B & Flags

The original web experimentation platform, now a full digital experience suite.

PostHog

Session Replay

Open-source product analytics, replay, flags and experiments in one self-hostable platform.

Statsig

A/B & Flags

Feature flags, experimentation and product analytics in one warehouse-friendly platform.

Unleash

A/B & Flags

Open-source feature management with a privacy-first, self-hosted architecture.

VWO

A/B & Flags

Experimentation plus heatmaps, replay and surveys in one conversion-optimisation suite.

AB Tasty

A/B & Flags

European experimentation and personalisation platform with strong GDPR positioning.

ConfigCat

A/B & Flags

Simple, cheap feature flags with unlimited team members on every plan.

Crazy Egg

Session Replay

Heatmaps, recordings and A/B testing in one tool, priced by pageview.

Eppo

A/B & Flags

Warehouse-native experimentation with a serious statistics engine.

Flagsmith

A/B & Flags

Open-source feature flags and remote config with straightforward self-hosting.

Kameleoon

A/B & Flags

Experimentation and personalisation with a strong hybrid client/server model.

Split

A/B & Flags

Feature delivery with automatic impact measurement on every flag.

Convert Experiences

A/B & Flags

Privacy-focused A/B testing with unlimited experiments and no data selling.