Ecomgraph
Fast Simon AI Search & Filters icon

Fast Simon AI Search & Filters

by Fast SimonPartner

Maximize your store sales & ROI with this easy-to-install app that will skyrocket your conversion rate instantly.

4.8(347 reviews)· Free plan available
View on Shopify App StoreMore Search and filters apps
Rich Horizontal Instant Search AutoComplete
Collection and Search Merchandising & Filter menu
product Filters
Agentic AI - AI Shopper assistants
Instant Search Autocomplete
Mobile Search Results
Search - Product Recommendations, upsell & cross Sell Targus
Product Recommendation Upsell & Cross Sell Vixen
Offer Shoppers An Interactive Shopping Assistant

About this app

We're passionate about delivering a cutting-edge eCommerce experience for our clients. That's why we've developed a revolutionary platform that integrates shopper behavior, store signals, and agentic AI to help you optimize your merchandising, navigation, search filters & AI shopping assistants. Fast Simon powers shopping optimization through NO-CODE front end, API, JS SDK, REACT Components and Hydrogen. Let us help you take your eCommerce business to the next level.

Pricing

Free to install

Free

  • 100 Monthly Sessions
  • Search product Filters
  • AI-based Instant Search & AutoComplete
  • Typo & Auto-Correction
  • No-Code editor- configure the experience

Starter

$39.99 /mo

  • FREE PLAN FEATURES+
  • 2,000 Monthly Sessions
  • Did You Mean, Synonyms, Antonyms
  • Custom Products Filters
  • Business Impact Analytics

Essential

$99.99 /mo

  • STARTER PLAN FEATURES+
  • 10,000 Monthly Sessions
  • Optimized Collection Filters
  • Advanced Impact Report
  • SKU Search

Top Pro

$299.99 /mo

  • ESSENTIAL PLAN FEATURES+
  • 30,000 Monthly Sessions
  • Merchandising Rules and A/B testings
  • Visual Collection Merchandising
  • Upsell and Cross-Sell Merchandising

Frequently asked questions

Is there a free plan, or do I have to pay from day one?

Fast Simon offers a free plan that includes 100 monthly sessions, AI-based instant search and autocomplete, search filters, and typo/auto-correction. Paid plans start at $39.99/month (2,000 sessions) and scale up to $99.99/month (10,000 sessions) and $299.99/month (30,000 sessions), with a 17% discount available on annual billing.

How does the billing work — what counts as a 'session,' and could bot traffic inflate my bill?

Fast Simon bills based on monthly sessions (website visits), not the number of products in your catalog. Some merchants with large catalogs have reported that Google bot crawls count toward their session limit, which can push them into a higher pricing tier unexpectedly. Stores with very large catalogs should monitor their bot traffic before committing to a plan, as jumping from the $99.99 to the next tier represents a significant cost increase.

How long does setup take — can I do it without a developer?

Fast Simon is designed for no-code installation, compatible with standard Shopify and Shopify Plus stores, so you can launch quickly without developer resources. It also supports API, JS SDK, React components, and Hydrogen for merchants who want deeper customization. The app has been available since 2014 and has a demo store you can preview before installing.

Will it work with my existing Shopify theme?

Fast Simon is built for seamless integration with Shopify themes, including mobile-responsive layouts, and supports custom CSS and custom styling. However, at least one merchant reported that an app update modified their theme.liquid file without prior notice, which disrupted an SEO project — so it's worth monitoring theme file changes after updates.

Does it integrate with tools like Klaviyo, Yotpo, or Shopify POS?

Yes — Fast Simon officially integrates with Klaviyo, Yotpo, Stamped.io, Okendo, Langify, TapCart, and Shopify Checkout. The Klaviyo integration specifically lets you leverage search and discovery intent to fuel personalized email, SMS, and automation flows. It also works with Shopify POS for omnichannel setups, and supports Shopify Markets for international selling.

Does it work for international or multi-currency stores?

Yes — Fast Simon supports multi-currency and multi-language out of the box, and integrates with Shopify Markets. Langify is listed as a supported integration for additional translation needs. For Shopify Plus merchants, it also supports B2B, custom pricing, and headless/Hydrogen storefronts.

What do other merchants say about the app and its support team?

Fast Simon holds a 4.8-star rating from 348 reviews on the Shopify App Store, with 93% of ratings being 5 stars. Merchants commonly highlight the responsive support team, robust customization for large catalogs, and meaningful improvements to search accuracy and conversions. A small number of critical reviews cite concerns about session-based billing scaling costs and an app update that unexpectedly modified theme files.