Optimizely
The original web experimentation platform, now a full digital experience suite.
What it is
Optimizely pioneered client-side A/B testing and has since expanded into content management, personalisation, commerce and feature experimentation. Its Web Experimentation product still offers the most mature visual editor for marketers running tests without engineering involvement.
Best for
Where it is strong
- The most capable visual editor for non-technical experiment authoring.
- Deep personalisation and audience-targeting features.
- Established statistics with sequential testing, so peeking is handled correctly.
Where it falls short
- Expensive, with a suite-oriented sales motion that pushes adjacent products.
- Client-side testing causes flicker and is increasingly blocked by browsers and blockers.
- Heavyweight for teams that only need a handful of experiments.
Pricing
Quote on request
Quote onlyFree tier: No free tier.
What drives the bill: Enterprise annual contracts, commonly in the tens of thousands and up. Priced by traffic and modules.
Check current pricing on Optimizely’s siteFigures are indicative and were last reviewed August 2026. Vendors change pricing often; confirm before you commit.
Works with
What people who use Optimizely say
No reviews of Optimizely yet. If you have used it in anger, yours would be the first.
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