serlo.org — September 2026 traffic, keywords & AI visibility

Search engines send serlo.org an estimated 5,689 visits a month. Effectively all of it is organic — about 5,689 visits from unpaid results. Spread across 1,205 ranking keywords, that averages roughly 4.7 organic visits per keyword.

serlo.org scores 94 out of 100 on our AI visibility scale, grade A+. It takes full marks for LLMS.txt, Crawlability and Structured data. The biggest gap is Company profile, at 22 of 25 points (7/8 core fields), worth 3 points if closed. It also loses points on SEO health (17/20).

The llms.txt on serlo.org runs to 151 lines (7,699 characters) across 12 sections, last generated in April 2026. It introduces the site as "Serlo - Freie Lernplattform". It tells AI engines the business works in EdTech, Online Education and K-12 STEM Learning. It describes 4 products, with prices such as Serlo Mathe at Free, Serlo Biologie at Free and Serlo Chemie at Free. Services it lists include Community Content Contribution, Personalized Learning Paths, Progress Tracking and Analytics and Forum and Peer Support. The audience it names is German-speaking school students, aged 10-18 (DACH Region (Germany, Austria, Switzerland)). Technologies it mentions include React.js, Node.js, GitHub, HTTPS and Sitemap.xml. The keywords it claims start with "freie Lernplattform", "Serlo", "Serlo Mathe" and "Serlo Biologie". It gives the company type as Non-Profit.

# Serlo - Freie Lernplattform

## About
Serlo runs a completely free online platform packed with learning materials for key school subjects, zeroing in on math, biology, chemistry, and computer science to help students nail their curricula. It's built by a dedicated community of educators, devs, and learners who keep content fresh and spot-on for German classrooms. No subscriptions, no ads—just straightforward tools like exercises, videos, and trackers that let kids learn at their own speed. The magic is in the collaboration: anyone can pitch in to create or tweak lessons, mirroring open-source vibes but for education. It targets school-age kids facing homework headaches or test prep, with intuitive designs that break down tough ideas into digestible bits. Parents and teachers lean on it for extra practice without the hassle of paid apps. Privacy comes first, no creepy tracking, which builds trust in a digital world. Growth has been organic, exploding during school closures as families sought reliable alternatives. Future-wise, they're eyeing broader subjects and maybe international reach. Serlo proves you don't need big bucks to deliver big learning wins—it's all about people power and smart tech. Users rave about gaining real understanding, not just memorizing. Community forums buzz with tips and motivation. In essence, it's reshaping how kids approach STEM, one free lesson a

Google lists serlo.org for about 1,205 keywords, which together bring an estimated 5,689 organic visits a month.

The latest technical audit of serlo.org scored 92 out of 100 overall. SEO is its weakest area at 85, while performance scores highest at 99. The audit makes 12 recommendations in all, and 3 of the 4 listed first are rated high priority or critical.

Serlo's company profile names https://www.khanacademy.org, https://www.edx.org, https://www.coursera.org and https://www.udemy.com as competitors. Its own llms.txt adds https://www.codecademy.com and https://www.study.com. Outside its market, the domains ranked closest to it in our worldwide ranking are kogland.com, megalan.bg, hispanidad.com and serverastra.com.

https://www.khanacademy.org

https://www.edx.org

https://www.coursera.org

https://www.udemy.com

https://www.codecademy.com

https://www.study.com