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.
eFileCabinet - . eFileCabinet Document Management Software is more than just “going paperless”. eFileCabinet is freedom, convenience, peace of mind, and profitability.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
M-Files - M-Files is an enterprise information management system that helps users with organizing and managing documents.
Swiftype - The simplest way to add search to your website or application. Sign up for free.
Dropbox DocSend - Dropbox DocSend is a secure file and document sharing solution that gives users analytics and control of document in their critical workflows. Key features include sending documents as secure links, eSignature, and customizable virtual data rooms.