Algolia is Open source tools for building search. You can install the search engine on your own servers, using the open source version, or instead use its scalable, flexible, cloud-hosted solution in PaaS/SaaS format.

Its algorithm and architecture allows a very fast search for relevant information, according to configurable parameters, even when actually storing terabytes of information. It is fully scalable, allowing for virtually unlimited growth.

Algolia is a hosted API for building search into web and mobile applications, with typo-tolerance, fully configurable relevance, and other tools for making great search experiences.