SancyBack to Sancy

Open content and credits

Last updated October 28, 2026

Sancy AI stands on other people's work. Here is what we use and how it is licensed. Sancy AI is not affiliated with or endorsed by any of these organizations.

Library content

  • Textbook passages come from OpenStax (Rice University) books, licensed under Creative Commons Attribution 4.0 (CC BY 4.0). Every passage in the app links to its original. The books used are Biology, Anatomy and Physiology, Chemistry, College Physics, Psychology, Introduction to Sociology 2e, Prealgebra, Elementary Algebra, Intermediate Algebra, Algebra and Trigonometry, Precalculus, Introductory Statistics, Principles of Macroeconomics for AP Courses 2e, Principles of Microeconomics for AP Courses 2e, Introduction to Business, American Government 3e, Introduction to Intellectual Property, Astronomy, College Algebra and Introductory Business Statistics. We extract the text and split it into short passages for search. Figures, images and their captions are omitted, so a passage may refer to a figure you won't see; follow the link to read the original.
  • Accounting passages come from Accounting Principles: A Business Perspective, First Global Text Edition (2010): Volume 1, Financial Accounting, by James Don Edwards and Roger H. Hermanson, and Volume 2, Managerial Accounting, by James Don Edwards, Roger H. Hermanson and Susan D. Ivancevich (8th edition authors Roger H. Hermanson, James D. Edwards and Michael W. Maher), published by the Global Text Project and licensed under Creative Commons Attribution 3.0 (CC BY 3.0). Every passage in the app links to the page of the original it came from. We extract the text and split it into short passages for search. Tables, figures, exhibits and end-of-chapter material are omitted. Sancy AI is not affiliated with or endorsed by the authors or the Global Text Project.
  • Study briefs in the Library, such as those for nursing, law, social work, calculus, geometry, finance and accounting, are original summaries written for Sancy AI. They are not copied from any exam outline, textbook or test maker. They are for learning, not professional, medical or legal advice.
  • Drug labels come from the U.S. Food and Drug Administration through openFDA, which is in the public domain. They are for learning only, not medical advice.
  • The school and major pickers use U.S. Department of Education data (IPEDS) and the Classification of Instructional Programs (CIP), both U.S. public domain.
  • College subjects outlines in the Library are original topic lists written for Sancy AI. They are not taken from any college's course catalog or from any textbook's table of contents, and they have no cited passages.

Pictures in Show it

Trademarks

MCAT is a registered trademark of the AAMC, LSAT of LSAC and NCLEX of NCSBN. Sancy AI is not affiliated with or endorsed by them. OpenStax is a trademark of Rice University, which does not endorse Sancy AI.

Software and fonts

  • AI tutoring uses Claude, made by Anthropic.
  • PDF reading uses pdf.js by Mozilla, under the Apache License 2.0.
  • Drawing and checking molecules uses OpenChemLib by Idorsia Pharmaceuticals, under the BSD 3-Clause License.
  • Checking the units of typed answers uses unitmath by Eric Mansfield, under the Apache License 2.0.
  • Text is set in Figtree and Fraunces, and the whiteboard's handwriting in Patrick Hand, all three under the SIL Open Font License 1.1 and served from Sancy AI itself. The license texts are in /fonts.
  • Page motion on the website uses the Motion library, under the MIT License.
  • Snapping a held stroke on the whiteboard to a clean shape builds on Excalidraw's shape recognition (copyright Excalidraw), under the MIT License.