Klexikon vs Wikipedia

Klexikon is a free German-language online encyclopedia written for children roughly 6 to 14 years old. Its editorial approach favors clear wording, short sentences and content suited to young readers. The project says Klexikon contains more than 3,500 articles, with a further 1,500-plus in MiniKlexikon, where the language is especially simple for beginning readers, German learners and children with additional learning needs. Articles use child-appropriate images from Wikimedia Commons, and the editorial guidance calls for at least one image per article. Some articles also include Tagesschau explanatory videos. The web site is available without a login; the project describes it as ad-free and says it does not collect personal data. Article text uses the Creative Commons Attribution-ShareAlike license, which requires attribution and the same license for reuse. Children may submit article requests, questions or error reports. Adults can apply to contribute by email and normally receive an account after an introductory course; new contributors must be at least 18. Klexikon also offers workshops for school classes with research tips and collaborative article improvement.

Wikipedia is a free encyclopedia available on the web and through mobile apps, with editions in hundreds of languages, including editions with over one million articles. Volunteer editors create and revise content, check facts, cite sources, discuss entries, and moderate the encyclopedia. The Wikimedia Foundation hosts and protects Wikipedia, while editorial decisions are made by volunteers. The Foundation says the service is available without advertising or paywalls and is funded mainly by donations, not advertising, subscriptions, or sales of users’ personal data. The official Android app supports searching articles, changing languages, saving reading lists for offline use, and adjusting themes and text size. Its listing says the app has no ads, does not track or collect data, and encrypts data in transit. MediaWiki provides a REST API for interacting with installations including Wikipedia. The Foundation publishes a privacy policy, says it prioritizes speed, reliability, and availability during traffic spikes, and publishes transparency reports twice a year. Its financial statements are independently audited annually. Wikipedia is free at free.