Klevu - Klevu offers instant site search solution for eCommerce stores.

Front-Commerce - Front-Commerce is the headless front-end that empowers merchants and developers to create customer experiences that convert, faster than ever before.

Swiftype Site Search - Swiftype Site Search helps to sell more, get the right answer to more people on the platform and surface relevant content for readers and followers.

Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.

Sooqr - Sooqr Search provides relevant and innovative site search engine for the website.

SLI Systems - SLI Systems