Dandelion Text Similarity API is a semantic sentence similarity API, optimized on short sentences written in several languages (Italian, English, German, Portuguese and French at the moment). With this API users are able to compare two sentences and get a score of a semantic similarity. It works even if the two sentences don't have any word in common, and it accepts also URLs as input values.
Text similarity, semantic relatedness, text mining
It works even if the two sentences don't have any word in common.
It uses a semantic algorithm for computing similarity of texts, but it is possible to use a more classical syntactic algorithm where the semantic one fails.