Alphabet's Google internet search engine is eroding demand for original content and undermining publishers' ability to compete with its artificial intelligence-generated overviews, a U.S. educational technology company said in a lawsuit filed on Monday.

In its court filing, Chegg argues that Google forces companies to supply proprietary content in order to be included in Google’s search function, unfairly exercises its monopoly power within search, and reaps benefits from Chegg's content without paying for it.

Chegg is suing Google parent Alphabet over claims the search engine’s artificial intelligence summary tool has hit its revenues, leading the US-listed educational technology group to weigh up a sale of the business.