Synpathy is a tool for annotating, analyzing, and graphically editing the syntactical structure of sentences (e.g. linguisticly annotated text corpora), developed at the Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands. The application is based on the SyntaxViewer from the TIGER search project developed by the IMS (Institute für Maschinelle Sprachverarbeitung, University of Stuttgart).

Since all (non) terminal node features values are user definable a wide range of linguistic descriptions like syntax trees, functional structures, dependency-style structures or predicate-argument structures can be accommodated. The annotated text together with its treebank graph information is stored separately from the list of labels used in the graph (features). Output formats are in persistent TIGER-XML. This facilitates the further processing of the data by other linguistic applications (like ELAN and ANNEX).