Industry standard collaborative whiteboarding with massive template libraries, but less streamlined for rapid AI diagram generation.

Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Whimsical records 966,895 monthly visits with -18.7% growth and Freemium pricing.

The collaborative whiteboard built for product builders
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | arena.ai | whimsical.com |
| Pricing Model | Free | Freemium |
| Monthly Visits | 35.83M (35,827,928) | 966.9K (966,895) |
| MoM Traffic Delta |
| +5.83M (+19.4%) |
| -222.85K (-18.7%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇮🇳 India (19%) |
|---|
| Direct Visits / mo | 24.34M | 602.36K |
|---|
| User Rating | 4.7 | 4.7 |
|---|
| Supported Platforms | Website | Website |
|---|

Battle-test AI coding models side by side
Send the same coding prompt to multiple leading models and compare their generated apps and logic side by side.
Watch models construct web apps and websites live, so you can see process and output, not just the final file.
Projects go beyond one-off snippets, testing how well a model structures components, routes, and styles together.
Track which coding models accumulate the most wins over time to identify consistently strong performers.

The collaborative whiteboard built for product builders
AI Flowcharts, AI Mind Maps and AI Wireframes convert a short text prompt into structured, fully editable diagrams, branched mind maps, or web and mobile wireflows — no manual drawing required.
Boards host diagrams, flowcharts, mind maps, wireframes, embedded media and documents side by side, so a whole product narrative lives in a single shareable file.
Multiple teammates edit the same board simultaneously with live cursors, thread comments attached to specific objects, and mention-based notifications.
Drag-and-drop UI components let teams sketch screens, link them into clickable flows and iterate on product ideas before engineering commits to a build.
Industry standard collaborative whiteboarding with massive template libraries, but less streamlined for rapid AI diagram generation.


Crowdsourced arena where AI models compete and humans crown the best design output
Free / Open-sourceCombines mind mapping and project workflows with AI agents, but less focused on pure visual diagramming and wireframes.

Agent Skills that give your coding agent real design taste
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Robust collaborative whiteboard with strong AI diagramming tools, but less polished UI wireframing capabilities than Whimsical.

Free AI hackathons and a global community for AI builders

Dedicated diagramming platform with strong AI chart generation, but less focus on freeform collaborative brainstorming whiteboards.
SpecialistInstantly turns natural language prompts into mind maps and flowcharts, but offers less freeform canvas drawing flexibility.
Combines whiteboarding and documentation with AI generation, but lacks Whimsical's specialized wireframe shape library.
Exceptional UI wireframing and prototyping tools, but less versatile for general mind mapping and freeform brainstorming.
Community plugin, rule, and MCP server hub for Cursor
Industry standard collaborative whiteboarding with massive template libraries, but less streamlined for rapid AI diagram generation.
Crowdsourced arena where AI models compete and humans crown the best design output
Agent Skills that give your coding agent real design taste
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Robust collaborative whiteboard with strong AI diagramming tools, but less polished UI wireframing capabilities than Whimsical.
Free AI hackathons and a global community for AI builders
Dedicated diagramming platform with strong AI chart generation, but less focus on freeform collaborative brainstorming whiteboards.
SpecialistInstantly turns natural language prompts into mind maps and flowcharts, but offers less freeform canvas drawing flexibility.
Combines whiteboarding and documentation with AI generation, but lacks Whimsical's specialized wireframe shape library.
Exceptional UI wireframing and prototyping tools, but less versatile for general mind mapping and freeform brainstorming.
Community plugin, rule, and MCP server hub for Cursor