Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Sendmux records 37 monthly visits with -98.3% growth and Free pricing.
Battle-test AI coding models side by side
Give every AI agent a real inbox and one API to use it
| Dimension / Metric | | |
|---|---|---|
| Official Domain | arena.ai | sendmux.ai |
| Pricing Model | Free | Free |
| Monthly Visits | 35.83M (35,827,928) | 37 (37) |
| MoM Traffic Delta | +5.83M (+19.4%) | -2.2K (-98.3%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇺🇸 United States (100%) |
| Direct Visits / mo | 24.34M | 12 |
| User Rating | 4.7 | 4.2 |
| 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.
Give every AI agent a real inbox and one API to use it
Provision mailboxes on verified domains or a shared myagent.mx address, with clean JSON output that strips signatures and quotes.
Send over HTTP or SMTP using the same mailbox credential as a Bearer token and SMTP password, with Idempotency-Key retries and attachment support.
Bind keys to providers, delivery groups, weights, and quota windows so traffic stays inside the boundaries you set.
Signed webhooks for delivery and receipt events, an SSE stream for live mailbox clients, and typed change polling for resync.
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
Collaborative inbox and email management for teams
Collaborative inbox and email management for teams
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
Email an AI assistant and let it run your schedules, inbox and CRM
The universal context engine connecting agents to data, tools, and models
Managed auth and 10,000+ tools for the agents you're building
Fast Apply and agent-tuned inference for coding agents
Fast Apply and agent-tuned inference for coding agents
AI gateway, observability and guardrails for production LLM apps
Community plugin, rule, and MCP server hub for Cursor
Community plugin, rule, and MCP server hub for Cursor
