Design & Prototyping Tools

Best Design & Prototyping tools by public signals

These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.

Best overallPenpot98 score License-safe pickPenpotOSI-approved OSS Fastest shippingtldraw100 shipping

Use Case Rankings

Ordered by ToolVitals score, health, shipping, confidence, and then adoption as a tie-breaker.

#	Tool	Health	Shipping	Openness	Stars	Score	Status
01	Penpot Open-source design and prototyping platform	98	95	OSI-approved OSS	57.8k	98	Active
02	tldraw very good whiteboard infinite canvas SDK	93	100	License unknown	49.5k	97	Active
03	Framer Website builder for designers	99	87	Proprietary target	—	91	Active
04	simple-icons SVG icons for popular brands	95	78	License unknown	25.5k	91	Active
05	Webstudio Open source website builder and Webflow alternative. Webstudio is an advanced visual builder that connects to any headless CMS, supports all CSS properties, and can be hosted anywhere, including with us.	84	90	OSI-approved OSS	8.8k	90	Active
06	Silex Silex is an online tool for visually creating static sites with dynamic data. With the free/libre spirit of internet, together.	85	84	OSI-approved OSS	2.9k	89	Active
07	Open Pencil AI-native design editor. Open-source Figma alternative.	79	83	OSI-approved OSS	7.5k	86	Active
08	Wayscriber Live overlay for drawing, annotating with zoom, hiding text, and capturing screenshots on Linux.	77	88	OSI-approved OSS	664	85	Active
09	Terrazzo Use DTCG tokens JSON to generate code for web, mobile, native apps, and more	88	65	OSI-approved OSS	429	84	Active
10	Graphite Open source comprehensive 2D content creation tool suite for graphic design, digital art, and interactive real-time motion graphics — featuring node-based procedural editing	77	62	OSI-approved OSS	26.7k	76	Active
11	Excalidraw Virtual whiteboard for sketching hand-drawn like diagrams	77	54	OSI-approved OSS	128.7k	76	Warning
12	powder The premier block theme for WordPress designers and agencies. Ka-chow!	49	47	License unknown	98	61	Warning
13	Drawnix 开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc.	65	22	OSI-approved OSS	14.4k	59	Warning
14	Onlook The Cursor for Designers • An Open-Source AI-First Design tool • Visually build, style, and edit your React App with AI	64	14	OSI-approved OSS	26.3k	56	Warning
15	Knotter Open-source workspace for graphs.	33	63	OSI-approved OSS	4	54	Warning
16	Superdesign Open-source AI product design agent for UI design and prototyping.	49	14	OSI-approved OSS	6.8k	50	Critical
17	Trace Open-source design and prototyping tool that exposes structure and logic.	38	17	License unknown	0	42	Critical
18	MaterialVect Web-based Material 3 expressive SVG editor.	35	11	OSI-approved OSS	2	40	Critical
19	EasyLogic Studio Fantastic web design tool.	38	0	OSI-approved OSS	500	38	Critical
20	Neoflow Neoflow is an open-source whiteboard application designed for seamless collaboration and creativity. It combines simplicity with advanced features, making it perfect for teams, designers, and creative minds.	33	0	License unknown	253	35	Critical
21	SketchFlow Collaborative whiteboard platform for visual collaboration.	23	0	License unknown	5	29	Critical
22	Animockup Open-source browser tool for creating animated product and device mockups.	18	0	OSI-approved OSS	1.9k	28	Critical

Evidence Watch

Tracked tools with useful public signals but no verdict score yet.

app-store-screenshots

end to end app store screenshot creation using AI

76 confidence

ArcMindAI

Turns product ideas into complete system architectures using AI, from diagrams to technical blueprints.

77 confidence

Ashim

A Self Hosted Image Manipulator - 45+ tools, local AI, and pipelines in a single Docker container. No cloud, no telemetry. Your images never leave your machine.

93 confidence

Awatif

Structural analysis and design software.

90 confidence

Canva

Visual design platform for everyone

50 confidence

CanvyDocs

Open-source Miro alternative for collaborative docs and boards.

78 confidence

Drawtonomy

Whiteboard for driving diagrams.

62 confidence

EasySchematic

Browser-based AV signal flow diagram tool for broadcast, live production, and AV integration.

89 confidence

Figma

Collaborative design tool for teams

76 confidence

FreeCut is a professional-grade video editor that runs entirely in your browser. Professional video editing, zero installation. Create stunning videos with multi-track editing, keyframe animations, real-time preview, and high-quality exports.

82 confidence