Experience Optimization upgrade paths
You can upgrade to Experience Optimization for SDL Tridion Sites 9.1 from several older versions of Experience Optimization (formerly SmartTarget).
This upgrade involves migrating your search indexes data from Fredhopper to Elasticsearch. Experience Optimization uses version 6.7 of the Elasticsearch search engine to provide both prescriptive and adaptive personalization capabilities.
The following table summarizes the versions from which you can upgrade to Tridion Sites 9.1 and the latest Experience Optimization.
| SDL Web or SDL Tridion Sites | Experience Optimization (formerly SmartTarget) | Fredhopper |
|---|---|---|
| SDL Tridion Sites 9 | Experience Optimization for SDL Tridion Sites 9 | not applicable |
| SDL Web 8.5 | Experience Optimization for SDL Web 8.5 | 7.5.x |