SONU is a free, open general-knowledge encyclopedia built for students, teachers, and curious readers everywhere. Our mission is simple: make reliable, well-researched knowledge freely accessible to anyone with an internet connection, regardless of where they live or what language they speak.
Our mission
We believe that good information should not sit behind a paywall. SONU exists to give every learner a trustworthy starting point for understanding the world — from the basics of a school syllabus to the context behind the headlines. We write for clarity first, and for depth wherever a topic needs it.
What we publish
- Long-form articles on science, history, geography, civics, arts, and everyday knowledge.
- Subject-wise quizzes that help you test and retain what you have learned.
- Country pages that gather exam-relevant material in one place.
- Articles available in multiple languages, with on-demand machine translation.
- A clear references section so every important fact can be traced back to a source.
How an article is made
Every article begins with research from published, citable sources. It is then drafted in plain, neutral language, reviewed by our editorial team for accuracy and balance, and only then published. After publication we revisit articles periodically and refresh them when facts change. You can read the full process on our editorial policy page.
Languages and accessibility
Knowledge should not be limited by language. Our English articles can be translated on demand, and we aim to grow coverage in the most widely spoken languages of the countries we serve. Where a translated version exists, the English original and its references remain the source of truth.
Built for students and exam preparation
A large part of SONU is organised around examinations. We group material by country and subject, add common exam questions to articles where they help, and provide quizzes so learners can check their readiness. Our goal is to be the one-stop study companion for students preparing for competitive and school exams.
Who runs the project
SONU is maintained by its editorial team and a network of volunteer contributors. Meet the people behind the project on the authors and editorial team page.
Licensing
Original text on SONU is published under a free license so it can be reused and improved by others. Details are on our Terms & Conditions page.
Get in touch
Questions, corrections, or suggestions? Write to us at [email protected] or use the contact page.