Algolia, a startup that hosts search engines that can be embedded inside companies’ websites, announced today an $18.3 million funding round.

Algolia competes with Searchify and Swiftype, as well as search services from cloud providers like Amazon Web Services and Microsoft Azure. Open-source tools such as Elasticsearch and Solr are also available, with several startups offering services based on those tools. (Algolia cofounder Julien Lemoine has a compelling Quora answer to the question of how the startup’s service is different from Elasticsearch.)

San Francisco-based Algolia started in 2012 and participated in Y Combinator last year.

Customers include DigitalOcean, Y Combinator’s Hacker News, Medium, Twitter-owned Periscope, and Product Hunt.

Accel Partners led the new round in Algolia. Alven Capital, Lead Edge Capital, Point Nine Capital, Storm Ventures, Ilya Sukhar, Solomon Hykes, Kevin Rose, and Erik Swan also participated.