Sefaria is an online open source, free content, digital library of Jewish texts. It was founded in 2011 by former Google project manager Brett Lockspeiser and journalist-author Joshua Foer. Promoted as a "living library of Jewish texts", Sefaria relies partially upon volunteers to add texts and translations. The site provides cross-references and interconnections between various texts. Hebrew, Aramaic, and Judeo-Arabic texts are provided under a free license in the original and in translation. The website also provides a tool for creating source sheets.
Sefaria is maintained by an eponymous non-profit organization which employs 18 engineers. According to their chief data officer Lev Israel, in 2019, the service received 250,000 unique visitors monthly.