
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
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massCode records 5,724 monthly visits with -25.5% month-over-month growth and Free pricing. VS Code records 7,397,370 monthly visits with -3.8% growth and Freemium pricing.

Free, open-source, local-first developer workspace for snippets, notes, APIs and diagrams
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | masscode.io | code.visualstudio.com |
| Pricing Model | Free | Freemium |
| Monthly Visits | 5.72K (5,724) | 7.4M (7,397,370) |
| MoM Traffic Delta |
| -1.96K (-25.5%) |
| -288.8K (-3.8%) |
| Primary Market & Share | 🇺🇸 United States (65.4%) | 🇺🇸 United States (18.9%) |
|---|
| Direct Visits / mo | 2.22K | 2.17M |
|---|
| User Rating | 4.4 | 4.8 |
|---|
| Supported Platforms | Website | Website |
|---|

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.

Write code with precision, hand bigger jobs to agents, and keep working from anywhere
Agents open the repository, form a plan, edit multiple files and explain the changes so you can review each diff before accepting it. You can also run several agents in parallel to push a backlog forward.
Point the editor at Anthropic, OpenAI, Google, Microsoft or open-weight models, or bring your own key. Pick the Copilot, Claude or Codex harness that matches how you like to work.
JavaScript, TypeScript, HTML and CSS work out of the box, and Marketplace extensions add IntelliSense, linting, refactoring and debuggers for Python, Java, C++, Go, Rust and more.
Integrated terminal, source control, debugger, testing, Jupyter notebooks, an integrated browser and Dev Containers all live in one window, so you stay close to the code.

OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

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OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
Battle-test AI coding models side by side
The AI coding agent for building ambitious software
Google's agent-first development platform for building and shipping software with AI agents
Learn to code free with hands-on lessons and instant playgrounds
Describe an app in chat and ship it
Zhipu AI's open platform for GLM large models, multimodal APIs, and agent building
Google DeepMind's #1 frontier AI model (Gemini Carbon 4) for long-horizon agentic coding, cybersecurity defense, and 1M-token multimodal reasoning.