
SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistShare and access study materials worldwide — with AI study tools built in
Coddy records 7,478,457 monthly visits with +17.8% month-over-month growth and Freemium pricing. Periplus records 27,280 monthly visits with -28.2% growth and Freemium pricing.

Turn any topic or PDF into a full AI-built course
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | coddy.tech | periplus.app |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 7.48M (7,478,457) | 27.28K (27,280) |
| MoM Traffic Delta | +1.13M (+17.8%) | -10.72K (-28.2%) |
| Primary Market & Share | 🇺🇸 United States (15.4%) | 🇺🇸 United States (56%) |
| Direct Visits / mo | 3.13M | 12.79K |
| User Rating | 4.3 | 4.3 |
| Supported Platforms | Website | Website |
Learn to code free with hands-on lessons and instant playgrounds
Short, practice-first coding lessons that run directly in your browser, so you can start learning without installing a compiler or development environment.
Dedicated playgrounds for Python, JavaScript, C, C++, Java, SQL, React, Go, Swift and many other languages let you test snippets and experiment immediately after each lesson.
Structured curricula such as Software Engineer, Frontend, Full Stack, Backend, Data Analyst, Data Scientist, DevOps and game development bundle the skills employers actually ask for.
Streak-style daily coding challenges and progress tracking help learners build a consistent habit and stay motivated between longer courses.

Turn any topic or PDF into a full AI-built course
Type a topic or question and get a chapter-by-chapter course, with any lesson able to branch into a new, linked course.
Any lesson converts into flashcards and quizzes that return on a schedule timed for just before you would forget.
Each chapter becomes a podcast episode hosted by two AI voices, with word-level captions, transcripts and the ability to ask questions out loud.
Documents link to related lessons so you can compare side by side or follow connections across subjects.

SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistShare and access study materials worldwide — with AI study tools built in
SpecialistAI flashcards that turn note dumps and PDFs into addictive quiz sessions
SpecialistAI flashcards that turn note dumps and PDFs into addictive quiz sessions

Delivers structured data science and coding courses with interactive playgrounds, but focuses heavily on data analytics rather than general software engineering.
Free AI flashcard and study tools for students
Free AI flashcard and study tools for students

SpecialistTeaches computer science and logic through visual interactive puzzles and an AI tutor, but lacks traditional text-editor coding playgrounds.

SpecialistAI study tools and a personal tutor built from your own course material
SpecialistAI study tools and a personal tutor built from your own course material
SpecialistFocuses on hands-on browser-based Linux and DevOps labs with AI guidance, rather than general multi-language programming fundamentals.
SpecialistFocuses on hands-on browser-based Linux and DevOps labs with AI guidance, rather than general multi-language programming fundamentals.

SpecialistTurn your notes into flashcards that stick
SpecialistTurn your notes into flashcards that stick

SpecialistTurn any lecture, PDF, or video into notes, flashcards, and quizzes in minutes
SpecialistTurn any lecture, PDF, or video into notes, flashcards, and quizzes in minutes
SpecialistAI study tools plus free A-Level and GCSE exam prep
SpecialistAI study tools plus free A-Level and GCSE exam prep
Turn PDFs, slides, notes and videos into Anki flashcards with AI
Turn PDFs, slides, notes and videos into Anki flashcards with AI

Free AI study partner that turns your course material into practice questions, guides and flashcards
Free AI study partner that turns your course material into practice questions, guides and flashcards