What is it?

doop presents itself as an open-source alternative to Paper.design, a design canvas where people and AI agents work in the same document at the same time. Frames on the canvas render real HTML inside a sandboxed iframe, and agents edit live through a built-in MCP server with cursors and presence. About 75% of public commits carry an AI co-author trailer, which is strong evidence of AI involvement.

What can it do?

• Multiplayer design canvas with presence
• Frames rendered as real HTML in a sandboxed iframe
• Built-in MCP server for live AI agent editing
• Card queue and mention based Doop Agent, plus Pages with grouping and undo

Who is it for?

Teams that want to self-host a design collaboration tool and users experimenting with agent editing

Pros

• AGPL-3.0 open source and self-hostable
• Renders real HTML so web output can be reviewed as-is
• Agent collaboration is built into the product

Cautions

• Full file compatibility with Paper.design is not confirmed
• The cloud version needs an account and model API keys
• Performance on very large documents has not been verified

Choosing doop

doop sits in the Craft category at Medium difficulty. everyday use is simple, but integration and setup expect some prior experience. runs on Browser · VPS. This page records 4 features, 3 pros and 3 cautions, so trade-offs can be reviewed in one place before adoption.

Other tools in this category

The Craft category also lists AgentCAD, OpenDesign, Open CoDesign, video-use, OpenPencil, slides-grab, SolidCraft, OpenCut, Compositor, ArtCraft, PhotoCraft, VectorCraft, FilmCraft, LightCraft, PdfCraft, EffectCraft, DesignCraft, FigCraft, WordCraft, SoundCraft, DeckCraft, CADCraft, GridCraft. AgentCAD has the same difficulty (Medium), so compare features and runtime environments to find where they split. Within a category the deciding factors are difficulty and runtime environment; each item below links to its own detail page.

• AgentCAD — A CAD tool that runs CAD scripts written by coding agents and exports STEP and mesh files (Medium)
• OpenDesign — An open-source design workspace that takes a brief to a prototype together with coding agents (Medium)
• Open CoDesign — A desktop app that makes prototypes, slides and PDFs locally from prompts, as an open-source Claude Design alternative (Easy)
• video-use — An open-source video editing workflow that handles cuts, subtitles and color from a clip folder and a Claude Code chat (Hard)
• OpenPencil — An open-source design editor that opens Figma files and edits them through AI chat, CLI and MCP (Medium)
• slides-grab — A slide workflow that lets you drag a region on AI-generated HTML slides and ask an agent to edit it (Medium)
• SolidCraft — Open-source parametric 3D CAD in pure Rust — desktop, web, and MCP automation (Medium)
• OpenCut — Open-source video editor aimed at CapCut and Premiere workflows — web, desktop, mobile (Easy)
• Compositor — Open-source Photoshop alternative for macOS — layers, masks, Camera Raw (Medium)
• ArtCraft — Open-source AI image and video studio for artists — world compositing, 3D blocking and character posing (Medium)
• PhotoCraft — Clean-room reimplementation of Adobe Photoshop in pure Rust — layers, masks, adjustment layers and real PSD files (Easy)
• VectorCraft — Adobe Illustrator workflow reimagined in pure Rust — fast vector illustration with live-editable effects (Medium)
• FilmCraft — Adobe Premiere-class editor rebuilt from scratch in pure Rust, down to its own codecs (Medium)
• LightCraft — Adobe Lightroom-class photo library and raw developer in open source — no account, no cloud, no telemetry (Easy)
• PdfCraft — Open-source PDF workbench — read, organize, combine, split and secure without Acrobat subscription (Easy)
• EffectCraft — After Effects-class motion graphics and VFX, rebuilt in pure Rust — 259 effects, expressions and 3D cameras (Medium)
• DesignCraft — InDesign-class page layout rebuilt in pure Rust with a Knuth–Plass paragraph composer (Medium)
• FigCraft — Figma-class interface design and prototyping rebuilt in pure Rust — auto layout, variants, variables and Dev Mode (Medium)
• WordCraft — Microsoft Word-class word processor built in pure Rust, reading and writing .docx (Easy)
• SoundCraft — Pro Tools/Audition-class DAW built in pure Rust — Edit/Mix windows, automation and 9.1.6 surround (Medium)
• DeckCraft — PowerPoint-class presentations rebuilt in pure Rust with .pptx compatibility and slide masters (Easy)
• CADCraft — AutoCAD-class 2D drafting in pure Rust — command line, snaps, layouts and associative dimensioning (Medium)
• GridCraft — Excel-class spreadsheets rebuilt in pure Rust — 500-plus functions, dynamic arrays and PivotTables on .xlsx (Easy)

Tags

Hands-on Testing

Repository, homepage and license checked (2026-10-20). doop.design reachable; editing features not executed.