Otzar HaHochma

Otzar HaHochma (Hebrew: אוצר החכמה, "Treasure of Wisdom") is a Torah database and software product that provides access to a very large library of scanned Jewish religious and research books. According to its official website, the collection contains about 156,000 Jewish books, described as "the largest Jewish book treasury in the world," covering the Bible, Hasidic literature, Kabbalah, and books on all subjects of Judaism. The Hebrew Wikipedia article states that version 24.0 (winter 2025/2026) contains approximately 157,000 titles, with the database growing by about 8,000 books per year. The product is distributed in two main ways: as a full offline collection on a hard disk for a one-time purchase, and as an online subscription service through the Otzar HaHochma website. The database also offers daily subscriptions and various usage options. Search and all books are available for free browsing with page limits and for 60 minutes daily, so some books are fully accessible for free within those limits. In addition to the general edition, a "Bnei Torah" edition is distributed, in which about 8,000 books that do not match the spirit of Haredi yeshivas have been removed. The database cooperates with several Torah publishing institutes, such as Yad HaRav Nissim, Mossad HaRav Kook, Machon Yerushalayim, and Oz VeHadar. Most institutes do not include their books in the general version, and their books can be purchased as a package within the database for a separate fee. With the packages included, the database contains about 157,000 books. The database is available in several virtual libraries, such as the Open University of Israel's online library and most university libraries. The creator of the database is Erez Sela, and the owners are Erez and Bosmat Sela. Alongside the database, Otzar HaHochma operates an internet forum for discussions on Torah literature, halakha, Jewish history, and biographies of rabbinic figures. In Adar 5780 (2020), the site launched the "Mefarshei HaOtzar" project, which collects commentators on each page of the Talmud and each halakha in Maimonides' Mishneh Torah, allowing users to click on a passage and see the commentators discussing it. The product is aimed primarily at the Orthodox Jewish and Torah-study market, including individuals, educational institutions, and libraries. It is a private, family-owned business rather than a publicly listed company.

Otzar HaHochma was created by Erez Sela, who is also its owner together with Bosmat Sela. The database was developed as a digital library of scanned Torah books, with most scans undergoing optical character recognition (OCR) to enable full-text search through a built-in search engine. The product is distributed both as an offline hard-disk collection and as an online subscription service. Over time, the database has grown substantially. By version 24.0 (winter 2025/2026), it contained approximately 157,000 titles, with an update rate of about 8,000 books per year. The database allows books to be divided into categories such as Bible and its commentators; Mishnah and its commentators; Babylonian Talmud and its commentators; Jerusalem Talmud and its commentators; Kabbalah; Musar; Hasidism; history; polemics; periodicals; community books, jubilee volumes, and memorial books; manuscripts and early printings. In addition to the general edition, a "Bnei Torah" edition is distributed, in which about 8,000 books that do not match the spirit of Haredi yeshivas have been removed. The database also cooperates with several Torah publishing institutes, such as Yad HaRav Nissim, Mossad HaRav Kook, Machon Yerushalayim, and Oz VeHadar. Most institutes do not include their books in the general version, and their books can be purchased as a package within the database for a separate fee. With the packages included, the database contains about 157,000 books. The database is available in several virtual libraries, such as the Open University of Israel's online library and most university libraries. Alongside the database, Otzar HaHochma operates an internet forum for discussions on Torah literature, halakha, Jewish history, and biographies of rabbinic figures. In Adar 5780 (2020), the site launched the "Mefarshei HaOtzar" project. On every page of the Talmud and every halakha in Maimonides' Mishneh Torah, the commentators dealing with the Gemara in Rashi and Tosafot were collected, and by clicking on a passage the software shows the commentators dealing with that passage. The official website also advertises periodic upgrade sales, such as a 30% discount on the upgrade to version 22 and Mefarshei HaOtzar in 2022, and various book week promotions.

• Launch of Mefarshei HaOtzar project

• Version 22 upgrade sale with 30% discount

• Version 24.0 released, containing approximately 157,000 titles

The largest Jewish book treasury in the world, offering a comprehensive Torah library for study and research.

• Otzar HaHochma hard disk edition

  Offline full collection on hard disk for one-time purchase.

• Otzar HaHochma online

  Online subscription service with monthly, daily, and other access options.

• Mefarshei HaOtzar

  Project collecting commentators on Talmud and Mishneh Torah, clickable to show relevant commentators.

• Bnei Torah edition

  Edition with about 8,000 books removed that do not match Haredi yeshiva spirit.

• Book Week promotion

  Periodic promotional pricing for upgrades and new versions.
• Version 22 upgrade sale

  30% discount on upgrade to version 22 and Mefarshei HaOtzar, from July 14 to August 11, 2022.

1. 1אוצר החכמה - 156,000 ספרי יהדות במחשב האישיotzar.org
2. 2Otzar HaHochma - Wikidatawikidata.org
3. 3אוצר החכמה - Wikipedia (Hebrew)he.wikipedia.org