Blueprint vs onUI
A side-by-side comparison of two IDE Extensions AI agents - to help you pick the right one.
Blueprint
Blueprint is an AI-powered planning copilot for coding agents that assists in breaking down tasks by asking multiple-choice questions and generating executable markdown plans. It integrates with popular IDEs like VS Code, Cursor, and Windsurf to streamline task planning for developers. The tool focuses on creating structured, agent-readable plans to guide coding workflows.
onUI
onUI is an open-source browser extension and MCP server that enables annotation-first UI pair programming with AI agents. It allows users to annotate webpages and bridge UI context to AI coding tools like Claude Code, Cursor, Windsurf, or Copilot, facilitating collaborative development.
Feature comparison
| Blueprint | onUI | |
|---|---|---|
| Category | IDE Extensions | IDE Extensions |
| Open source | Not publicly specified | |
| Self-hostable | Not publicly specified | |
| Skill level | Intermediate | Intermediate |
| Pricing | Open Source | Open Source |
Blueprint: what it solves
It eliminates ambiguity in task planning for coding agents by converting high-level goals into clear, step-by-step executable plans.
onUI: what it solves
It streamlines the process of integrating UI context into AI-assisted coding workflows, eliminating manual context switching between browsers and IDEs.