penecho/penecho

Health v2 · maintenance only

Flags: young

Adoption not part of the score

2137 stars · 263 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

PenEcho is an open-source visual AI workspace: a shared canvas where handwriting, equations, diagrams, and spatial context become part of an AI conversation. It ships as desktop apps for macOS and Windows or via npm, with a Canvas Agent that generates and refines editable visual content in place.

Use cases

• sketch math equations and get AI explanations beside them
• generate architecture diagrams and refine them with pen or prompt
• handwrite notes and diagrams on an infinite canvas with AI assistance
• collaborate with others on a shared visual thinking canvas
• create interactive lessons and explainers visually
• self-host an AI whiteboard with my own API keys

When to choose

• you think visually and want AI context beyond a chat thread
• you need handwriting, equations, and diagrams in one workspace
• you want local/self-hosted use where API keys stay on your device
• you teach or explain concepts with diagrams and interactive visuals

When to avoid

• you only need a plain text chat with an LLM
• you need a lightweight note-taking app without AI features
• you require a permissive license for proprietary derivative work (AGPL-3.0)
• you need offline AI without any model provider or API key

Facets

application · maturity active

chat-interface nlp data-visualization gui developer-tools artificial-intelligence education developer-tools data-visualization windows cross-platform self-hosted whiteboard handwriting canvas visual-thinking ai-agent diagrams equations collaboration macos nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="penecho/penecho")