What are the best open source alternatives to OpenPencil?

The top open source alternatives to OpenPencil include Grida. These tools offer similar functionality while being free and open source.

Why choose an open source alternative to OpenPencil?

Open source alternatives provide transparency, community support, no vendor lock-in, and often cost savings. You can customize the software to your needs and have full control over your data.

Are these OpenPencil alternatives really free?

Yes, all listed alternatives are open source and free to use. You may need to pay for hosting if you self-host, but the software itself is free.

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Open Source OpenPencil Alternatives

A curated collection of the 1 best open source alternatives to OpenPencil.

The best open source alternative to OpenPencil is Grida. If that doesn't suit you, we've compiled a ranked list of other open source OpenPencil alternatives to help you find a suitable replacement.

OpenPencil alternatives are mainly Low-Code/No-Code Platforms but may also be UI/UX Design Tools or Design & Prototyping Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of OpenPencil.

Written by Piotr Kulpinski

Last updated: June 3, 2026

OpenPencil

A Figma-compatible design editor with built-in AI chat, headless CLI, real-time P2P collaboration, and a Vue SDK for building custom editors. No account needed.

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Grida is an open source canvas editor aimed at designers and developers who want a single tool for visual design and web app building. It covers the range from polished UI/UX layouts to pixel art, with enough extensibility that developers can embed it, script it, or build entirely new tools on top of it.

The canvas itself is general-purpose. You can work from templates, drag in widgets and icons, write copy with an AI assistant, and edit text directly on the canvas. Figma import and export means you're not starting from scratch if your team already has assets in Figma. For pixel work, there's a dedicated free pixel drawing mode built into the same editor.

What separates Grida from tools like Penpot or Excalidraw is its developer-first architecture:

React component – embed the canvas directly in your own app, or bring your own React components into it
Modular SDK – build custom tools on top of Grida's core rather than being locked into the default interface
Scripting interface – automate design tasks and write plugins using a runtime scripting layer
Performance – compute-heavy modules run on Rust and WebGPU, which matters when you're working with complex documents or large canvases

For teams, Grida offers enterprise options with on-premise deployment and custom solutions, so it's not just a solo design tool.

It fits developers who want a visual web builder they can actually hack on, and designers who need something between a lightweight whiteboard and a full-featured UI tool.