Fast Simon, formerly InstantSearch+, provides e-commerce search, filters and merchandising for Shopify, Magento, BigCommerce and WooCommerce.
About 113 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is Fast Simon (InstantSearch+) detected?
Its storefront scripts and API calls use the acp-magento.appspot.com host, which kept its original name across platforms. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About Fast Simon (InstantSearch+)
Top 50 websites using Fast Simon (InstantSearch+)
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-29 22:59:04 UTC.
Questions about finding Fast Simon (InstantSearch+)
How does PageSourceSearch know a website uses Fast Simon (InstantSearch+)?
By the source itself: Its storefront scripts and API calls use the acp-magento.appspot.com host, which kept its original name across platforms. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
Is this a complete list of websites using Fast Simon (InstantSearch+)?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 113 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
How do I find websites that use Fast Simon (InstantSearch+) together with another technology?
Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example acp-magento.appspot.com/ with wp-content/plugins/ lists the WordPress sites that use Fast Simon (InstantSearch+).