Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.

mention - Media monitoring made easy with Mention. Create alerts on your name, brand, competitors and be informed in real-time of any mention on the web and social networks

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

BuzzSumo - BuzzSumo allows you to discover the most shared links and key influencers for any topic. It's free to use and you can run a search in seconds!

ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.

Dovetale - Find and work with influencers using image recognition