Kaiju Hub AI vs pen.dev

Kaiju Hub AI is a workspace for building web, mobile, and desktop applications with AI-assisted tools. Project Hub brings project files, a terminal, task management, and version history together. The platform lists OpenAI, Anthropic, Gemini, Grok, DeepSeek, and Ollama as supported providers, and supports frameworks including React, Vue, Angular, Svelte, and Next.js. Wireframe tools let users arrange screens by drag and drop and generate code for React, Vue, Svelte, Angular, and SolidJS. It can analyze UI screenshots, identify elements, and turn them into wireframes or production code. Development integrations include Claude Code, Gemini CLI, Codex CLI, GitHub, and SDK modes for Claude, Gemini, and OpenAI. Web projects can be deployed to Vercel, Netlify, Railway, Fly.io, and Render. Block Library supports image and video generation, including local image generation through ComfyUI. The Free plan costs nothing and caps active projects and several other item types at five, with one active marketing campaign. Pro (monthly) costs $20 a month and lists unlimited active items in those categories. Prompts and project data may be processed by connected AI providers; users are responsible for provider API usage and costs.

pen.dev is a canvas for building software and a vector design tool integrated with development environments. Its editor works with components, variables, themes, scripts and shaders, and can import Figma files and HTML. It can export to HTML, CSS and Tailwind, as well as PNG, JPEG, WEBP and PDF. Users can work with its integrated agent or connect external agents through MCP; the available plans specify how many agents can run in parallel. Documented integrations include Claude Code, Codex, Gemini CLI, Antigravity, OpenCode, Kiro and Claude Desktop. Integrated provider options include OpenAI, Anthropic, Google Gemini, Cursor, GitHub Copilot, xAI, OpenRouter and other API-key providers. Its.pen design file is open JSON with an open schema. Tools include a Chrome extension for importing webpages, IDE extensions and an npm-installed CLI requiring Node.js 22.19 or later. The pricing page says pen.dev stays free until plans launch. The Free plan is free; Pro is $16 a month; Ultra is $48 a month.