Open-source Miro alternatives

Excalidraw is a browser-based whiteboard that renders shapes, arrows and text in a deliberately hand-drawn style, which makes diagrams feel like quick sketches rather than polished slides. It is used for architecture diagrams, wireframes, brainstorming and teaching, and works on an infinite canvas with zoom and pan.

The editor offers rectangles, circles, diamonds, arrows, lines, free-draw and an eraser, along with labeled arrows that stay bound to shapes, image support, shape libraries, dark mode and undo and redo. Drawings export to PNG, SVG or the clipboard, or to an open JSON-based .excalidraw file. The hosted app adds real-time collaboration with end-to-end encryption, offline use as a progressive web app, autosave in the browser and shareable read-only links.

The editor is also published as an npm package under the MIT license, so developers can embed it in their own products and customize it. A separate paid plan, Excalidraw+, is linked from the project for people who want a hosted workspace.

AFFiNE is an open-source workspace that combines writing, drawing and planning in a single app. Documents, an edgeless whiteboard and table views share the same blocks, so you can place rich text, sticky notes, embedded web pages, database views, linked pages, shapes and even slides anywhere on one canvas. It is presented as an alternative to Notion and Miro.

The project stresses local-first storage, meaning your data lives on your own device first, together with real-time collaboration. A multimodal AI assistant helps write reports, turn outlines into slides, summarize articles into mind maps and organize tasks. Under the hood it uses CRDTs for syncing and is built mostly in TypeScript and Rust, with Electron for the desktop app. It also supports Markdown, wiki and knowledge-base use, and presentations.

AFFiNE's license is listed as 'Other' on GitHub, so review it before commercial use. There is a live demo and documentation on the project site, a hosted version is available, and the app can also be self-hosted.

tldraw is an SDK for building infinite canvas applications in React. It supplies a complete canvas engine that serves as the foundation for whiteboards, diagramming tools, design editors and other canvas products, and it ships a default whiteboarding tool set that you can use as is or replace with your own primitives.

Out of the box it offers pressure-sensitive drawing, geometric shapes, rich text, arrows with snapping, image and video support and image export. Developers can extend it with their own shapes, tools, bindings, interface components, side effects and event hooks, and can drive the canvas at runtime through the Editor API. Multiplayer collaboration is available through a self-hostable sync package, there are canvas primitives for building with LLMs, and the DOM-based rendering can embed websites such as YouTube, Figma and GitHub. It works in desktop and touch browsers.

Starter kits provide the custom shapes, tools and interface for common application types, and each kit is MIT licensed. The SDK itself is under tldraw's own license rather than a standard open-source one, so review the terms before shipping it in a commercial product.

Drawnix is a free, open-source whiteboard that brings mind maps, flowcharts and freehand drawing together in a single workspace. Instead of switching between separate diagramming apps, you can sketch ideas, structure them into diagrams and annotate everything on one infinite canvas that you can zoom and scroll freely.

The editor supports inserting images, undo and redo, copy and paste, light and dark themes, and a layout that adapts to mobile devices. Mermaid syntax can be converted into flowcharts and Markdown text into mind maps, while work is saved automatically in the browser and can be exported as PNG images or as .drawnix JSON files for later reuse.

Drawnix is released under the MIT licence and is built on Plait, an open-source drawing framework from the PingCode team, using a plugin architecture that can work with different UI frameworks. The hosted app at drawnix.com is a minimal version, and the repository includes Docker instructions for people who prefer to run their own copy.

WBO, short for Whitebophir, is an online collaborative whiteboard that lets many users draw at the same time on a large virtual board. Every change appears in real time for everyone connected, and the state of each board is always saved, so you can return to a board later. A public demonstration server is available if you want to try it before installing.

The project suggests uses ranging from art and entertainment to design and teaching, and its screenshots show boards used for diagram editing, math lessons and drawing. Topics also tag it for education. Boards are reachable by name, including an anonymous board, so people can start collaborating without creating an account.

If you have your own web server you can run a private instance. The recommended route is the official Docker image, which listens on port 5001 and keeps boards outside the container. Running directly with Node.js 22 or later is also supported, although it offers less isolation. When behind a trusted proxy or CDN you should set the IP source setting explicitly. The software is licensed under AGPL-3.0.

tldraw offline is a desktop application for drawing, diagramming and whiteboarding on tldraw's infinite canvas, described as a local whiteboard for you and your agents. There are no accounts or servers, and it works without an internet connection, with documents saved as portable .tldraw files you can keep private, back up or share.

Builds are available for macOS as a universal DMG for Apple silicon and Intel, for Windows as an installer for x64 or Arm64, and for Linux as an AppImage for x64 or Arm64 and a Debian package for x64, with a Homebrew option on macOS. Each document opens in its own window, the app keeps working copies of open documents and can restore unsaved work after an unexpected exit, and it checks for updates at startup. The .tldraw format holds the canvas, pages, stored media and any embedded document script, and legacy .tldr files can be opened and exported.

A user manual covers installation, file management, keyboard shortcuts, troubleshooting and agent setup. The repository metadata does not give a license, so check the project terms before use.

Ideon is a self-hosted visual workspace for projects. Instead of abstract folders and tabs, it uses spatial organization: you place blocks on a shared infinite canvas, and what sits close together is related, so a project's repositories, design notes and tasks can be seen on a single map.

Blocks can hold Markdown notes, images, links, files and to-dos, and live integrations embed repositories and issues from GitHub, GitLab, Gitea and Forgejo directly on the canvas. Teams can collaborate in real time, and a time travel feature shows historical snapshots of the workspace to trace past decisions. A hosted demo is available to try without setup.

Ideon runs with Docker and Docker Compose, using a PostgreSQL database and a persistent storage volume, and there is a one-click template for the Easypanel deployment platform. You set a secret key in an environment file before starting the stack and open the dashboard on port 3000. It is written in TypeScript and licensed under AGPL-3.0.

InfiniPaint is an open-source drawing and note-taking app built on an infinite canvas that you can zoom without a fixed limit, until your computer runs out of memory. That makes it handy for sketches that mix huge scale differences, such as a solar system drawn to scale, as well as for ordinary notes and doodles.

Collaboration is built in through online lobbies, which include text chat and the ability to jump to the position of other participants. The project is written in C++ and has a web version compiled with Emscripten that needs a WebGL2-capable browser, though the maintainer recommends the native build for a better experience. Drawing tablets are among the topics the project lists.

Native builds are offered for Windows (installer or portable zip), macOS on Apple Silicon, and Linux through Flathub or flatpak bundles. Files use the .infpnt extension. The author says it was inspired by the Lorien infinite canvas program, and the code is released under the GPL-3.0 licence.

Drafft.ink is a digital whiteboard with an infinite canvas, written in Rust and rendered with WebGPU. It runs on Linux, Windows, macOS, in the browser and on mobile, works without an account, and offers real-time collaboration through the Loro CRDT. The authors position it as a subscription-free tool, and the code is licensed under AGPL-3.0 so you can use, modify and host it as long as it stays open.

Drawing tools include rectangles, ellipses, lines, arrows and freehand paths with pressure sensitivity, plus smart guides for alignment, equal spacing and angle snapping. Text supports multiple fonts, per-character styling and inline LaTeX math, and images can be dropped or pasted into the document. A sketchy, hand-drawn style is available through the roughr library. Boards export to PNG or JSON, and JSON can be imported back. Touch gestures work on tablets, and the project states there is no telemetry.

For collaboration you run a single-binary server that listens on a WebSocket endpoint with no configuration files, or use the hosted site at drafft.ink. It is comparable to Excalidraw, which appears among its topics.

Revezone is a lightweight, graphic-centric productivity tool aimed at people building a personal knowledge base, often described as a second brain. It is local-first, meaning notes and boards are stored in the browser or on the local machine rather than requiring a cloud account, and it is currently in public beta.

It combines whiteboard functions based on both Excalidraw and Tldraw with a WYSIWYG, Notion-like note editor that supports slash commands and Markdown syntax. Notes and boards can be organized into folders in a left sidebar, with flexible layout allowing users to sort directories and split the screen by dragging and dropping. The Excalidraw-based board also supports custom fonts and double-link connections to notes within the desktop app.

Revezone can be used online, with data stored in the browser, or as a downloadable desktop app with data stored locally. It is written in TypeScript and released under the AGPL-3.0 license. This repository contains only the basic functionality of the project, according to its README.