The AI developer cloud for GPU pods, serverless inference and clustering
Actcast records 585 monthly visits with -59.9% month-over-month growth and Contact for Pricing pricing. Code Arena records 35,827,928 monthly visits with +19.4% growth and Free pricing.
Connect the physical world to the web with edge AI sensing
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | actcast.io | arena.ai |
| Pricing Model | Contact for Pricing | Free |
| Monthly Visits | 585 (585) | 35.83M (35,827,928) |
| MoM Traffic Delta | -875 (-59.9%) | +5.83M (+19.4%) |
| Primary Market & Share | 🇯🇵 Japan (100%) | 🇮🇳 India (13.1%) |
| Direct Visits / mo | 200 | 24.34M |
| User Rating | 4.1 | 4.7 |
| Supported Platforms | Website | Website |
Connect the physical world to the web with edge AI sensing
Runs trained models on local edge devices such as Raspberry Pi so events are detected on-site and only metadata is sent onward.
Sensing applications are packaged as Acts that can be published, discovered and installed onto registered devices.
A central console lets you register, organize and monitor devices and groups across one or many locations.
Detected events can be pushed to your own services through webhooks and APIs, making it easy to wire Actcast into existing applications.

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 AI developer cloud for GPU pods, serverless inference and clustering
Free / Open-sourceBuild, train, and deploy computer vision for the physical world
Free / Open-sourceBuild, train, and deploy computer vision for the physical world
Rent cloud GPUs by the second from a global marketplace
Rent cloud GPUs by the second from a global marketplace
Free / Open-sourceServerless cloud infrastructure for AI and data workloads
Free / Open-sourceServerless cloud infrastructure for AI and data workloads
An AI-native cloud built from silicon to API for training, tuning, and serving models
An AI-native cloud built from silicon to API for training, tuning, and serving models

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

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-sourceRun native ComfyUI in the cloud with zero setup, fast GPUs, and one-click serverless APIs
Free / Open-sourceRun native ComfyUI in the cloud with zero setup, fast GPUs, and one-click serverless APIs
Free / Open-sourceThe AI cloud built by the creators of PyTorch Lightning
Free / Open-sourceThe AI cloud built by the creators of PyTorch Lightning

Gigawatt-scale AI compute, built and operated end to end