Optimizely vs GrowthBook
Side-by-side from the Top 11 ranking of Optimizely vs VWO vs AB Tasty: 11 Best A/B Testing Tools 2026. Last verified June 13, 2026.
The short answer
Optimizely ranks higher on Top 11 (#1 vs #11) for Growth teams running experiments. The enterprise standard for its powerful stats engine and full-stack experimentation features.
At a glance
| Optimizely | GrowthBook | |
|---|---|---|
| Top 11 rank | #1 / Optimizely vs VWO vs AB Tasty: 11 Best A/B Testing Tools 2026 | #11 / Optimizely vs VWO vs AB Tasty: 11 Best A/B Testing Tools 2026 |
| Score (out of 9.4) | 9.2 | — |
| Best for | Enterprise-scale experimentation | Open-source testing on your data warehouse |
| Pricing | $$$$$ (Custom enterprise plans) | $ (Free to custom) |
| HQ | New York, USA | San Francisco, USA |
| Founded | 2009 | 2020 |
Optimizely
The enterprise standard for its powerful stats engine and full-stack experimentation features.
www.optimizely.comSee full entry in Optimizely vs VWO vs AB Tasty: 11 Best A/B Testing Tools 2026
GrowthBook
An open-source tool that runs on your data warehouse, giving you full data ownership.
www.growthbook.ioSee full entry in Optimizely vs VWO vs AB Tasty: 11 Best A/B Testing Tools 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.