Founded in 1998, ClearForest had its headquarters just outside Boston and a development center in Or Yehuda.

It now markets its services under the names Calais, OpenCalais, and OneCalais.

ClearForest was previously venture-backed; its last funding round was led by Greylock Ventures and closed in 2005.

On February 7, 2008 Reuters announced the launch of Open Calais,[2] a named-entity recognition and semantic analysis service that uses ClearForest technology.

ClearForest offers several hosted solutions, including: ClearForest also offers Text Analytics solutions targeted at specific business problems, including: