Semantic Web Search Engines

A directory of semantic search engines that can either be accessed online or deployed within your enterprise.

Cuil
Self proclaimed to be the world's biggest search index, Cuil proposes to do a deeper analysis of the content it crawls. It is debatable whether or not it can be classified as "Semantic", but then again - so is the definition.

inbenta Semantic Search
SaaS-based service that provides search to any website within the cloud. Includes Semantic Search capabilities and Natural Language Processing (NLP). Site owners can integrate Semantic Search engine on their site and their content. Other features include customization, XML ,API, and real-time reporting tools. This search approach has its foundations in lexical functions and Meaning-text theory (I. Mel’cuk , A. Žolkovskij, J. Apresjian).

Sindice - the Semantic Web Index -
Over 10 billion pieces of reusable information can already be found across 100 million web pages which embed RDF and Microformats. Start consuming this data today with Sindice Data Web services.

• The Sindice Map of Data lists sites that export their information via Microformats and embedded RDF (and lists the format(s) the sites are using).

WolframAlpha
Computational Knowledge Engine - "the first step in an ambitious, long-term project to make all systematic knowledge immediately computable by anyone."

Yebol
Knowledge Based (Smart) Search.