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. Calling itself "a living library of Jewish texts", Sefaria relies on volunteers to add texts and translations. 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 was originally founded in 2011 by journalist Joshua Foer and Brett Lockspeiser, a former product manager at Google. The site's first beta was released in 2012. The company was formally incorporated in 2013, with funding from the Natan Fund, Jonathan and Tamar Koschitzky, and the Jim Joseph Foundation. By 2015, twelve apps used Sefaria's API and database. Also in 2015, Sefaria reached a deal to use Urim Publications' translations of the Tanakh and commentaries. Sefaria's website received a major redesign in 2016, alongside the release of new apps for smartphones running iOS and Android, and a complete English translation of Rashi's commentary on the Torah. By this point, over a dozen people were part of the website's staff. Sefaria reached a major milestone in 2017, with the release of the William Davidson Talmud. Finally in 2021, Sefaria announced a major addition of a complete translation of Ibn Ezra's Torah commentaries provided by H. Norman Strickman and Arthur M. Silver, one of the only resources to have a complete translation of these works in English. In 2019, Lockspeiser was listed among Forward Magazine's 50 under 50 for this advancement in Torah technology.
Sefaria has a vast library of Jewish text, including Tanakh, Talmud, and Jewish prayers alongside sources in philosophy, mysticism, Jewish law, and newer works. Sefaria's content comes from a variety of sources. Books in the public domain are scanned and processed by OCR software, which a team corrects and formats. Other online sources such as On Your Way are also used. Some publishers have also provided works directly to Sefaria.
Many works are linked with their respective commentaries. For example, clicking on a verse in Tanach will open a window on the side, allowing the user to open a commentary on that verse.
Sefaria's Source Sheet Builder allows users to create a page with source text from Sefaria. Source Sheets can be made public, and available for other users, or can be downloaded as a PDF and printed.