Open Source FigJam Alternatives

Excalidraw is a browser-based whiteboarding tool built around one idea: making diagrams feel human. Everything you draw comes out with a sketchy, hand-drawn style that keeps things informal and approachable, which makes it popular for brainstorming sessions, technical diagrams, and quick wireframes where polish would actually get in the way.

It's built for collaboration. Multiple people can work on the same canvas in real time, making it a practical choice for remote teams who need a shared visual space without spinning up heavy software.

Key capabilities include:

• Hand-drawn rendering that gives shapes, arrows, and text a natural, informal look
• Real-time multiplayer so teams can sketch together live
• Exportable scenes to PNG, SVG, or the native .excalidraw format for reuse
• Libraries of reusable shapes and components you can drop into any canvas
• End-to-end encrypted sharing when you share a link with collaborators
• Embeddable in other apps via its open API, which is why it shows up inside tools like Obsidian and Notion

Compared to tools like draw.io or tldraw, Excalidraw leans harder into the sketchy aesthetic as a deliberate design choice rather than a mode you toggle. It's not trying to produce publication-ready diagrams. That constraint is the point: it keeps conversations focused on ideas rather than pixel-perfect layouts.

The canvas is infinite, the interface stays minimal, and the whole thing runs in the browser with no account required to start drawing.

AFFiNE brings together the tools that most teams keep separate: a block-based document editor, an infinite whiteboard, Kanban boards, and a database layer, all inside one workspace. It's built for people who are tired of copying information between a wiki, a whiteboard app, and a project tracker. Everything lives in one place, and it's connected.

The local-first design is a genuine differentiator. Your data sits on your device by default, not on someone else's server. Sync is available, but you're not forced into a cloud subscription to use the core product. For teams with privacy requirements or individuals who want full ownership of their notes and plans, that matters.

Key capabilities:

• Edgeless mode turns any page into an infinite canvas where you can sketch, drag in documents, add sticky notes, and map out ideas spatially
• Block-based editing lets you build documents from reusable content blocks, mixing text, images, databases, and embeds freely
• Kanban boards sit alongside docs for project tracking without needing a separate tool like Trello or Jira
• AI integration assists with writing, summarizing, and planning directly inside the workspace
• Templates cover common use cases out of the box, from meeting notes to project plans
• Real-time collaboration lets teams work on the same page simultaneously

Compared to tools like AppFlowy or AnyType, AFFiNE leans harder into the visual side. The whiteboard isn't an afterthought; it's a first-class mode that can hold entire knowledge maps. Compared to Outline, it's less focused on structured wikis and more on freeform, mixed-media workspaces.

Free for individuals. Teams and commercial users pay for additional features. The source code is fully public, so self-hosting is an option for those who want it.

tldraw is a free virtual whiteboard that opens in your browser and works immediately. No account, no installation, no waiting. It runs on desktop, tablet, and mobile, making it practical for quick sketches, brainstorming sessions, or visual collaboration across teams.

The core experience is fast and low-friction. You get a clean infinite canvas with drawing tools, shapes, text, arrows, and sticky notes. Real-time multiplayer is built in, so multiple people can draw and edit together without any setup. Share a link and collaborators are in.

What sets tldraw apart from tools like Excalidraw or draw.io is its focus on feel. The drawing experience is deliberately smooth, with snapping, alignment guides, and a hand-drawn aesthetic that makes diagrams feel approachable rather than stiff. It's well-suited for informal collaboration: wireframes, quick diagrams, meeting notes with visuals, or just thinking out loud with a colleague.

Key capabilities include:

• Infinite canvas with zoom and pan that stays responsive at any scale
• Multiplayer collaboration via shareable links, no accounts required for guests
• Shape library covering arrows, connectors, text, and freehand drawing
• Embeds so you can drop in images and other content directly onto the board
• Export to PNG, SVG, and JSON for use outside the app

tldraw is also available as an open-source SDK, which means developers can embed the whiteboard engine directly into their own products. That dual nature (polished end-user tool and embeddable component) gives it a broader reach than most LucidChart alternatives in this space.