Product discovery is where revenue is won or lost for Shopify Plus merchants, and the native search functionality that ships with Shopify is simply not built to keep pace with complex catalogs, high-traffic stores, or the personalization expectations of today’s shoppers.
Investing in the right search and discovery app is one of the highest-leverage decisions a growing ecommerce brand can make, with measurable conversion uplifts that compound across search, recommendations, and category merchandising simultaneously.
The platforms on this list were evaluated on AI capability, Shopify Plus integration depth, merchandising control, scalability, and the ability to treat search as part of a connected commerce experience rather than a standalone feature.
Whether you are running a catalog of 500 products or 500,000, one of these tools is the right fit for where your store is headed.
1. Nosto
Best for: Shopify Plus brands that need unified AI search, personalization, and merchandising in a single platform
Nosto is one of the Best Shopify Plus Search & Discovery Apps available today, positioning itself as a Commerce Experience Platform (CXP) that combines AI-powered site search, product recommendations, category page merchandising, content personalization, and business intelligence under a single interface.
Rather than solving one part of the discovery problem, it connects all of them, allowing brands to manage the entire shopper journey from a single platform without the data silos that come from running multiple disconnected tools.
The search engine itself uses vector search and natural language processing to interpret shopper intent beyond simple keyword matching, delivering relevant results even for long-tail, conversational, or ambiguous queries that trip up lesser systems.
Predictive autocomplete accelerates the path to purchase, while merchandising rules give teams strategic control to pin, promote, or demote products based on margins, inventory levels, or active campaign priorities.
Nosto is a Shopify Plus Certified App Partner, meeting Shopify’s standards for performance, security, privacy, and support, and it is the first personalization solution to integrate with Shopify Markets, making it the natural choice for brands with international or multi-market ambitions.
Its infrastructure supports 99 percent uptime with enterprise-grade server response times, which means brands can scale into peak trading periods without search latency affecting the customer experience.
The platform integrates natively with Klaviyo, Tapcart, Yotpo, and Shopify Flow, and it supports both standard Shopify Plus themes and headless Hydrogen builds without sacrificing any of its personalization capabilities.
Brands including O’Neill, Marc Jacobs, Credo Beauty, MUJI, Kylie Cosmetics, and Belstaff use Nosto across more than 100 countries, and Volcom Europe reported conversion rates 3.5 times higher and average visit values 3.8 times greater for shoppers interacting with Nosto recommendations compared to those who did not.
Key features: Semantic and vector AI search, predictive autocomplete, category merchandising, A/B testing, content personalization, business intelligence, Shopify Markets integration, headless Hydrogen support
2. Klevu
Best for: Enterprise Shopify Plus merchants with complex catalogs who want AI search that learns and improves over time
Klevu has built one of the strongest reputations in the Shopify Plus search market for enterprise-grade AI that genuinely gets better the longer it runs, refining results based on what shoppers actually click, browse, and buy rather than relying on static keyword rules.
This behavioral learning model makes it particularly well-suited to stores where product intent is nuanced and hard to map with simple text matching alone, such as apparel, home goods, and lifestyle brands with overlapping categories.
The merchandising dashboard is accessible to non-technical teams, offering campaign scheduling, faceted filtering management on product listing pages, and A/B testing without requiring developer involvement.
Klevu supports both Shopify Markets and Hydrogen, making it a solid option for brands that have moved into headless commerce architectures and need a search solution that can keep up.
Klevu’s analytics dashboard provides clear visibility into search behavior and zero-results queries, giving merchandising teams the data they need to make informed decisions about synonym management, boost rules, and collection structure.
Pricing begins at around $449 per month, placing it firmly in the enterprise tier, but for stores generating the volume to justify it, the performance gains on conversion and average order value typically cover the investment at speed.
Key features: NLP-powered AI search with behavioral learning, advanced collection merchandising, faceted filtering, A/B testing, Shopify Markets and Hydrogen compatibility, zero-results analytics
3. Boost Commerce
Best for: Mid-market Shopify Plus brands that want reliable AI search with strong filtering and room to grow
Boost Commerce has established itself as one of the most trusted search and discovery solutions in the Shopify ecosystem, with over 14,000 brands worldwide generating more than $16 billion in sales through the platform since launch. Its strengths lie in combining fast, intent-driven AI search with highly configurable faceted filtering that can be tailored to match a store’s product taxonomy without custom development, making it genuinely accessible for merchandising teams that operate without dedicated engineering support.
The platform’s AI search goes beyond keyword matching to understand what shoppers mean rather than just what they type, with typo tolerance, contextual results, and real-time ranking that adapts to individual customer interactions.
An optional AI personalization layer gives merchants a path to machine-learning-driven recommendations when they are ready to invest in them, without forcing the upgrade before the store has the data or volume to benefit.
Boost also carries the “Built for Shopify” badge, meeting Shopify’s standards for performance, design, and integration, and it supports multi-store, multi-currency, and multi-language setups for brands scaling across borders.
It starts at $29 per month for standard plans, with Shopify Plus tiers priced by catalog size, making strong filtering and search quality genuinely accessible to mid-market stores that are not yet ready for enterprise-level platform investment.
Key features: AI semantic search, smart autocomplete, advanced faceted filtering by tag and metafield, visual merchandising, AI product recommendations, A/B testing, multi-currency and multi-language support, Built for Shopify badge
4. Searchanise
Best for: Growing Shopify Plus stores that need professional-grade search without enterprise pricing
Searchanise fills a meaningful gap in the market for merchants who want genuine search quality improvements over Shopify’s native offering without committing to enterprise pricing or complex implementation timelines.
It covers the core search experience reliably, with smart autocomplete, typo tolerance, synonym management, and customizable product filters available out of the box, and its setup process is notably straightforward compared to heavier platform alternatives.
The free plan makes it accessible to stores at the earliest stages, while paid tiers add behavioral analytics, merchandising rules, voice search, product banners, and more advanced recommendation placements across the store.
For Shopify Plus brands in the 500 to 5,000 product range that are ready to move beyond default search but are not yet at the volume or complexity level where Klevu or Nosto pricing makes sense, Searchanise consistently punches above its price bracket.
Searchanise is trusted by over 14,800 ecommerce stores globally, including brands like Durex, Fossil, and Sennheiser, demonstrating that its reliability and feature set serve well-known brands operating at scale.
Paid plans range from $9 to $39 per month, making it one of the most cost-effective professional search solutions available in the Shopify Plus ecosystem.
Key features: Instant AI search, smart autocomplete, voice search, typo tolerance, synonym management, customizable product filters, product banners, behavioral analytics, and merchandising rules.
5. Fast Simon
Best for: Shopify Plus merchants with visually rich catalogs who want AI search with strong visual discovery capabilities
Fast Simon focuses on AI-powered search, merchandising, and personalization for Shopify, with a particularly strong visual discovery layer that sets it apart from search-first competitors.
Its combination of instant search overlays, image-based visual search, and AI-assisted collection ranking makes it well-suited for catalogs in fashion, home decor, and jewelry, where shoppers often navigate by aesthetic as much as by keyword.
The platform’s merchandising tools cover upselling, cross-selling, and collection page optimization in a single interface, with drag-and-drop visual controls that reduce reliance on developer time for non-technical teams.
Smart collections are automatically curated and sorted based on real-time signals, including popularity, conversion rate, and inventory availability, reducing the manual burden for brands with fast-moving or seasonal product ranges.
Fast Simon integrates with major Shopify tech stack tools and offers accessible pricing tiers that make its visual discovery features available to mid-market brands before they reach enterprise-level revenue.
For catalogs where visual product discovery has clear commercial value and text-based search alone does not capture the full range of how shoppers explore, Fast Simon provides a differentiated and practical option in the Shopify Plus search and discovery space.
Key features: AI-powered instant search, visual and image-based search, smart collections, AI-assisted collection ranking, upsell and cross-sell merchandising, drag-and-drop visual controls, and real-time inventory-aware ranking.
How to Choose the Right App for Your Store
The right search and discovery platform for a Shopify Plus store depends on three things: the complexity of your product catalog, the depth of personalization you want to deliver, and how much of the discovery experience you need to manage from a single system.
For brands where search is the primary conversion lever and catalog complexity is high, platforms like Nosto that unify search, personalization, and merchandising under one data model produce compounding returns that point solutions cannot replicate.
For stores that need reliable, fast, and well-configured search without the investment of a full commerce experience platform, Klevu, Boost, Searchanise, and Fast Simon each deliver strong results at the right price point and complexity level.
The question worth asking of every tool on this list is whether it treats search as a standalone feature or as part of an interconnected discovery experience, because for Shopify Plus brands managing high-value customer segments, the answer to that question has a direct and measurable impact on conversion performance.
