Algolia

Founded in 2012 Algolia provides a hosted search API that allows websites and mobile applications to increase user engagement and conversions.
Algolia API returns search results in milliseconds with a search-as-you-type experience for their end users. Algolia offers out-of-the-box support for every language is typo-tolerant and allows easy ranking configuration for your data set.
Algolia allows any developer to build the search engine they want quickly and easily and serves today more than 4B queries per month with 99.99% SLA.
Algolia has over 600 customers in 50 countries with offices in San Francisco and Paris. Algolia customers include: Vevo Periscope Quiksilver Medium Product Hunt A Little Market (an Etsy company) CrunchBase HackerNews Genius.com and Livestream.