Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceRun and build with open AI models locally or in the cloud
Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Tambo records 7,034 monthly visits with +3.7% growth and Freemium pricing.
An open-source toolkit for adding AI agents to your React app
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | arena.ai | tambo.co |
| Pricing Model | Free | Freemium |
| Monthly Visits | 35.83M (35,827,928) | 7.03K (7,034) |
| MoM Traffic Delta | +5.83M (+19.4%) | +250 (+3.7%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇺🇸 United States (64.9%) |
| Direct Visits / mo | 24.34M | 2.78K |
| User Rating | 4.7 | 4.3 |
| 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.
An open-source toolkit for adding AI agents to your React app
Register your existing React components once and the agent renders them with the correct props, inheriting your styling, design system and business logic instead of inventing new markup.
Streaming, message threads, cancellation, error states, conversation storage and component state are handled for you, so AI features do not require rebuilding core app infrastructure.
The agent inherits the signed-in user's permissions and session, keeping AI features inside your existing security and authorisation boundaries.
Model Context Protocol integration on both sides connects the agent to external tools and data sources, with MCP OAuth support for authenticated servers.
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.
Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.

Crowdsourced arena where AI models compete and humans crown the best design output
Crowdsourced arena where AI models compete and humans crown the best design output

Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows

Agent Skills that give your coding agent real design taste
Agent Skills that give your coding agent real design taste
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills

Free AI hackathons and a global community for AI builders
Free AI hackathons and a global community for AI builders

Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product
Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations

Free / Open-sourceOpen-source workspace to build, deploy and govern AI agents

Free / Open-sourceSelf-driving agent platform you run in your own cloud
Community plugin, rule, and MCP server hub for Cursor
Community plugin, rule, and MCP server hub for Cursor