
SpecialistGeneral-purpose conversational AI that can explain complex concepts and make practice quizzes, but lacks dedicated study note repositories.

Studocu records 39,297,122 monthly visits with +1.1% month-over-month growth and Freemium pricing. Zeli records 56,147 monthly visits with -46.8% growth and Free pricing.

Hacker News and AI paper summaries in seven languages
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | studocu.com | zeli.app |
| Pricing Model | Freemium | Free |
| Monthly Visits | 39.3M (39,297,122) | 56.15K (56,147) |
| MoM Traffic Delta |
| +430.47K (+1.1%) |
| -49.3K (-46.8%) |
| Primary Market & Share | 🇺🇸 United States (12.3%) | 🇨🇳 China (65.1%) |
|---|
| Direct Visits / mo | 6.5M | 39.95K |
|---|
| User Rating | 4.4 | 4.3 |
|---|
| Supported Platforms | Website | Website |
|---|

Share and access study materials worldwide — with AI study tools built in
Search a vast, student-contributed library of lecture notes, summaries, study guides and past exams organised by course and institution.
Generate notes, summaries and revision material from documents so you can study the essentials instead of re-reading everything.
Turn study material into interactive quizzes and flashcards so you can test yourself and target weak spots.
Use built-in text-to-speech to listen to study documents on the go, useful for revision during commutes or downtime.

Hacker News and AI paper summaries in seven languages
Each story carries a short summary generated from the linked article plus a standout key quote, so you can judge relevance before clicking through.
The whole feed — titles, summaries and top comment highlights — is available in English, Chinese, Japanese, Korean, German, Spanish and Russian.
Every day gets a permanent page containing every story that hit the front page, retrievable long after the feed has moved on.
Daily AI papers are surfaced with translated titles and AI summaries, making Zeli a research reader as well as a news reader.

SpecialistGeneral-purpose conversational AI that can explain complex concepts and make practice quizzes, but lacks dedicated study note repositories.

Gamified flashcard and quiz creation from PDFs, but lacks Studocu's extensive crowdsourced student note library.
Free / Open-sourceStronger free flashcard creation and practice tests from notes, but less reliance on crowdsourced university document sharing.
SpecialistTailored for specific exam prep and coursework feedback with an AI tutor, rather than open note sharing.

Excellent AI-driven video explainers and interactive study sets, but lacks Studocu's massive repository of crowdsourced course notes.
Converts multi-format lecture materials into audio podcasts and quizzes, but has a smaller community note repository.

A proactive AI reading lens for papers, videos, and web pages
Very similar shared university document database and study tools, but with a strong European student community focus.

SpecialistConverts course notes into personalized flashcards and mind maps, but lacks crowdsourced document sharing.

Fast AI summarization and quiz generation from lectures, but focuses less on peer-to-peer university document sharing.
SpecialistProvides structured mock tests and spaced repetition, but lacks general peer note uploads.
Clean AI-powered summary and flashcard generation, but lacks the large archive of peer-shared university course documents.
SpecialistGeneral-purpose conversational AI that can explain complex concepts and make practice quizzes, but lacks dedicated study note repositories.
Gamified flashcard and quiz creation from PDFs, but lacks Studocu's extensive crowdsourced student note library.
Free / Open-sourceStronger free flashcard creation and practice tests from notes, but less reliance on crowdsourced university document sharing.
SpecialistTailored for specific exam prep and coursework feedback with an AI tutor, rather than open note sharing.
Excellent AI-driven video explainers and interactive study sets, but lacks Studocu's massive repository of crowdsourced course notes.
Converts multi-format lecture materials into audio podcasts and quizzes, but has a smaller community note repository.
A proactive AI reading lens for papers, videos, and web pages
Very similar shared university document database and study tools, but with a strong European student community focus.
SpecialistConverts course notes into personalized flashcards and mind maps, but lacks crowdsourced document sharing.
Fast AI summarization and quiz generation from lectures, but focuses less on peer-to-peer university document sharing.
SpecialistProvides structured mock tests and spaced repetition, but lacks general peer note uploads.
Clean AI-powered summary and flashcard generation, but lacks the large archive of peer-shared university course documents.