Which factors determine the cost of creating a corporate thesaurus?

Aside from the size of your thesaurus, it depends on how well you know the domain, if you already have vocabularies that can be re-used, and how well interlinked the thesaurus concepts should be. Using PoolParty you can significantly reduce the costs, as ease of use is our priority and we offer several innovative features that support thesaurus creation and maintenance tasks, like the ability to do natural language analysis on your documents to glean new terms for thesauri, the feature to enrich your thesaurus with Linked Data or an alternative wiki user interface that allows anyone in your organisation to add labels and definitions to thesaurus concepts.