Klevu - Klevu offers instant site search solution for eCommerce stores.
Optimizely - A/B testing you'll actually use.
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Evergage - Evergage's real time web personalization software can help you boost engagement, increase revenue and drive more conversions. Web personalization software that's easy to use.
Site Search 360 - Site Search 360 enhances and improves your built-in CMS or product search with autocompletion, semantic search, filters, facets, detailed analytics, and a whole lot of customization options.
Qubit - Qubit is a web personalization platform founded by former Google workers, using innovative technology to collect, store, process, and output data to optimize consumers' experiences on the web. Read more about Qubit.