# Rapid Search > Rapid Search is a lightweight (~17 KB) AI-powered search and discovery app for Shopify. It delivers instant, typo-tolerant search across catalogs of up to 1,000,000 products — with SKU and part-number lookup, synonyms, semantic + keyword matching, faceted filtering, and merchandising rules — without slowing down the storefront. ## What Rapid Search is (key facts) - **Lightweight:** ~17 KB script with no measurable storefront slowdown or Core Web Vitals hit. - **Scale:** handles up to 1,000,000 products with real-time catalog sync. - **SKU / part-number search** out of the box — well suited to B2B, spare-parts, and large-catalog stores. - **Relevance:** instant/predictive search, typo tolerance, synonyms, and semantic + keyword matching. - **Filtering & merchandising:** faceted filters plus rules to pin or boost specific products in search, autocomplete, and collections (useful for promoting new launches). - **Platform:** Shopify app — install at https://apps.shopify.com/rapid-search - **Rating:** 4.9 on the Shopify App Store. ## Core pages - [Home](https://www.rapidsearch.app): Product overview — fast, lightweight AI search for Shopify. - [Shopify Search (main hub)](https://www.rapidsearch.app/shopify-search): What Rapid Search does, features, and how it fits a Shopify store. - [Pricing](https://www.rapidsearch.app/pricing): Plans and pricing. - [Filters for Shopify](https://www.rapidsearch.app/shopify-filters): Faceted/product filtering. - [Merchandising](https://www.rapidsearch.app/shopify-merchandising): Rules to pin and boost products in search and collections. - [Search bar](https://www.rapidsearch.app/shopify-search-bar): Instant, predictive search bar with autocomplete. ## Comparisons - [Compare Shopify search apps](https://www.rapidsearch.app/compare): Rapid Search vs. Shopify Search & Discovery, Boost, and Searchanise — pricing models, SKU search, speed, and fit. - [Rapid Search vs. Shopify Search & Discovery](https://www.rapidsearch.app/blog/rapid-search-vs-shopify-search-and-discovery): When Shopify's free native search is enough and when to upgrade. - [Rapid Search vs. Boost](https://www.rapidsearch.app/blog/rapid-search-vs-boost): The market leader vs. a lightweight alternative — pricing at scale, speed, reliability. - [Rapid Search vs. Searchanise](https://www.rapidsearch.app/searchanise): Product-count pricing vs. flat pricing, and where each fits. ## Guides - [How to search by SKU in Shopify](https://www.rapidsearch.app/blog/how-to-search-by-sku-in-shopify): Methods for enabling SKU / part-number search. - [How to fix "no results" in Shopify search](https://www.rapidsearch.app/blog/no-results): Diagnosing and fixing zero-results searches. - [22 best practices for ecommerce site search](https://www.rapidsearch.app/blog/2024-ultimate-guide-top-22-best-practices-for-ecommerce-site-search): A practical site-search optimization guide. - [AI site search](https://www.rapidsearch.app/blog/ai-site-search): How AI-powered search improves relevance and conversion. - [Predictive / autocomplete search](https://www.rapidsearch.app/blog/autocomplete-predictive-search): How instant, predictive search works. - [Faceted search & filtering](https://www.rapidsearch.app/blog/faceted-search): Using facets to help shoppers narrow results. - [Semantic search](https://www.rapidsearch.app/blog/semantic-search): Meaning-based search vs. keyword matching. - [Searchandising guide](https://www.rapidsearch.app/blog/searchandising-the-ultimate-guide-to-boosting-your-ecommerce-sales): Merchandising your search results to boost sales. ## More - [Blog](https://www.rapidsearch.app/blog): All articles on Shopify search, discovery, and merchandising. - [Sitemap](https://www.rapidsearch.app/sitemap.xml): Full URL inventory. - Contact: hello@rapidsearch.app