Host4 AI is a managed cloud hosting platform built for running AI coding agents like Claude Code and OpenAI Codex around the clock. You get a persistent Linux environment with browser terminal, SSH, and free SSL, so your agent keeps working even when you close your laptop. It suits developers running long refactors, non-technical founders building sites from prompts, and teams that need a shared, always-on AI coding workspace without managing servers themselves.

• Managed Claude Code and Codex Hosting: Both agents come pre-installed in a persistent Linux environment, so you can start coding without setup work.
• Browser Terminal and SSH Access: Reach your environment from any device through a web terminal or standard SSH, with tmux sessions that keep agents running.
• Bring Your Own AI Credentials: Connect an Anthropic API key or log in with your Claude Pro/Max subscription so you only pay Host4 AI for hosting.
• Full Root Linux Access: Install Aider, ChatGPT CLI, or any other AI coding tool alongside Claude Code with no restrictions.
• AI Builder for Non-Coders: Describe your idea in plain English and Claude Sonnet 4 builds a live site for you, with image upload and live preview.
• Custom Domains and Free SSL: Every project gets a .host4.ai subdomain, and paid plans support custom domains with automatic SSL certificates.
• Zero Lock-In Code Portability: Download files via the file manager, clone with git, or copy over SSH/SCP anytime you want to leave.
• Isolated Environments with Daily Backups: Each account runs on its own filesystem and network, with backups stored on a separate server.

• Cost-Effective for Heavy AI Users: Bring your own Claude subscription or API key and pay as little as $5/month for the server itself.
• Free First Site Forever: Create and host one project permanently at no cost. The free plan includes 20 AI messages, 1 vCPU, 1 GB RAM, and 5 GB storage for testing the platform.
• Persistent AI Agents: If you hit usage limits, your site and files stay live; only new AI messages pause until you top up.
• Flexible Tool Support: Full root access means you are not locked into one AI coding tool and can run several at once.
• True Code Ownership: Export projects anytime through git, SSH, or the file manager, so migrating away is straightforward.

• Limited RAM on Entry Tiers: The lifetime and starter plans include only 1 GB RAM, which can be tight for larger repos or heavy agent bursts.
• Requires a Separate AI Subscription for Continuous Work: After 20 free messages you need your own Anthropic account or API credits to keep using the AI features.
• Command Line Knowledge Is Helpful: While the AI Builder is no-code, getting full value from the terminal environment still expects basic Linux familiarity.

• Long-Running Autonomous Refactors: Point Claude Code at a large codebase, kick off a refactor inside tmux, close your laptop, and check the results later from your phone or browser.
• Prompt-to-Website Building for Non-Coders: Founders and designers describe an idea in plain English through the AI Builder and get a live site on a .host4.ai subdomain in minutes.
• Persistent Side Project Environment: Keep dependencies, environment variables, and background processes in one always-on place instead of rebuilding your local setup.
• Shared Team Coding Workspace: Multiple developers SSH into the same environment to use Claude Code with consistent tooling and no local setup drift.
• Multi-Agent Experimentation: Run Claude Code, Codex, and Aider side by side to compare outputs on the same repo without juggling local installs.
• Mobile AI Agent Management: Users can check progress, reconnect to sessions, and manage AI coding tasks from a phone browser while the cloud environment continues running.