Instapaper is a social bookmarking service that allows web content to be saved so it can be "read later" on a different device, such as an e-reader, smartphone, or tablet. The service was founded in 2008 by Marco Arment. In April 2013, Arment sold a majority stake to Betaworks and by mid 2016 Pinterest acquired the company. In July 2018, ownership of Instapaper was transferred from Pinterest to a newly formed company Instant Paper, Inc. The transition was completed on August 6, 2018.