Coddy records 7,478,457 monthly visits with +17.8% month-over-month growth and Freemium pricing. massCode records 5,724 monthly visits with -25.5% growth and Free pricing.
Learn to code free with hands-on lessons and instant playgrounds
Free, open-source, local-first developer workspace for snippets, notes, APIs and diagrams
| Dimension / Metric | | |
|---|---|---|
| Official Domain | coddy.tech | masscode.io |
| Pricing Model | Freemium | Free |
| Monthly Visits | 7.48M (7,478,457) | 5.72K (5,724) |
| MoM Traffic Delta | +1.13M (+17.8%) |
| -1.96K (-25.5%) |
| Primary Market & Share | 🇺🇸 United States (15.4%) | 🇺🇸 United States (65.4%) |
|---|
| Direct Visits / mo | 3.13M | 2.22K |
|---|
| User Rating | 4.3 | 4.4 |
|---|
| 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.
Free, open-source, local-first developer workspace for snippets, notes, APIs and diagrams
Organize reusable code fragments in nested folders, tag them for fast filtering, and jump to anything through a keyboard-driven command palette.
Write Markdown notes, explore connections between them in a graph view, and turn notes into tasks with status, priority, due dates and links to related snippets and requests.
Save API requests, run them in sequence, pass values between steps, and inspect responses or JSON diffs without leaving the app.
Connect OpenAI, Anthropic, Gemini, DeepSeek, Mistral, xAI or OpenRouter with your own key, or use a local Ollama/LM Studio model, to edit code, reorganize notes and test APIs. An MCP server exposes the same vault to external AI agents.
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#3
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Google's agent-first development platform for building and shipping software with AI agents
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.
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SpecialistFocuses on hands-on browser-based Linux and DevOps labs with AI guidance, rather than general multi-language programming fundamentals.
Free / Open-sourceRun many coding agents in parallel, each in its own worktree
SpecialistAn AI IDE and coding agent that works on your project, not just your cursor
