Fast Simon
AI-powered site search, merchandising, and personalization for retail eCommerce stores.
Independent overview by new Mantra · updated July 16, 2026
- Category
- Marketing
- Pricing
- Starter, Essential and Growth plans priced on request (14-day free trial); Enterprise custom
- Implementation
- 1-2 weeks
- Adoption risk
- Low
- Integrates with
- Shopify, BigCommerce, Klaviyo, Yotpo, Rebuy
What Fast Simon does
Fast Simon is an AI product discovery platform built for eCommerce retailers. It covers four main areas: site search, collection merchandising, shopper personalization, and conversational commerce — all within a single platform. The goal is to help shoppers find products faster and give store owners more control over how products are surfaced and ranked.
On the search side, Fast Simon handles autocomplete, typo tolerance, synonym matching, and visual search — meaning shoppers can find products by uploading or browsing images rather than typing keywords. Merchandising solutions let you control how collections are sorted and displayed, using a mix of AI-driven rules and manual overrides based on factors like inventory, sales, and margin.
Personalization works at the session and behavior level, adjusting search results, collection pages, and product recommendations for individual shoppers in real time. A newer conversational commerce feature lets shoppers navigate your catalog through a natural-language chat interface, guided by the same merchandising and personalization logic running elsewhere on your store.
Key capabilities
AI Site Search
Handles typos, synonyms, and autocomplete so shoppers reach relevant results quickly. Also supports visual search, letting shoppers find products using images rather than text.
Collection Merchandising
Lets you sort and rank products within collections using AI rules tied to inventory, sales, or margin, alongside manual and visual merchandising controls.
Shopper Personalization
Adjusts search results, collection pages, and product recommendations individually based on each shopper's session behavior and purchase history.
Conversational Commerce
Provides a chat-style shopping interface where customers can describe what they want in plain language and receive guided product recommendations.
Visual Discovery
Uses AI image tagging and visual similarity to power features like Shop Similar, Shop the Look, and image-based search across your catalog.
Growth and Retention Integrations
Connects with Klaviyo and Yotpo to feed AI-driven product recommendations into email, SMS, and retargeting flows.
Best for
- Retail eCommerce stores running on Shopify or BigCommerce that want to upgrade beyond their platform's native search.
- Merchants whose catalogs are large or complex enough that shoppers regularly struggle to find the right product.
- Teams that want merchandising control — such as pinning, ranking by margin, or seasonal sorting — without heavy developer work.
- Stores already using Klaviyo, Yotpo, or Rebuy that want to feed smarter product recommendations into their marketing automations.
- Businesses that want a 14-day free trial to test core functionality before committing to a paid plan.
Worth knowing
- Fast Simon no longer publishes plan prices — Starter, Essential and Growth are all priced on request — so you will need a sales conversation before budgeting.
- The right tier will depend on your store's traffic and catalog size, so confirm a quote against your actual session volume before budgeting.
- Implementation is estimated at one to two weeks, which is relatively light, but you'll still need time to configure merchandising rules and test search behavior for your specific catalog.
- Deep integrations are available for Shopify and BigCommerce; if your store runs on a different or custom platform, check SDK and headless commerce compatibility before proceeding.
- The platform spans several distinct modules — search, merchandising, personalization, and conversational commerce. If you only need one of these, a more narrowly focused solution might be a simpler and cheaper fit.
Related solutions
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