Overview
Persona.js is a lightweight, open-source AI chat UI library that embeds into any website, from modern apps to static HTML. It is framework-free, backend-agnostic, and WebMCP-native, allowing your assistant to discover and execute tools exposed by the parent page. With features like streaming chat, voice, theming, and interactive copilot experiences, Persona.js aims to simplify adding agentic front-end experiences without rebuilding your frontend or writing bespoke APIs.
AgentMicro is a local-first macOS menu-bar companion for supervising parallel Codex Desktop and CLI tasks. It surfaces task state, project, elapsed time, and results at a glance, then opens the matching Codex Desktop task with one click. It observes local metadata only and never uploads prompts, responses, source code, or task history, ensuring privacy.
Feature Comparison
| Feature | Persona.js | AgentMicro |
|---|---|---|
| Primary Purpose | Embeddable AI chat UI library for websites | macOS menu-bar companion for Codex tasks |
| Deployment | Web-based, framework-free | Native macOS app (14+) |
| Framework Support | Works with any stack (React, Vue, Svelte, static HTML) | Not applicable |
| Backend Integration | Backend-agnostic with SSE streaming; supports AI SDK, OpenAI Agents, LangGraph, Hono, Express | Integrates with Codex Desktop and CLI via local session metadata |
| Agentic Capabilities | WebMCP-native: discovers and executes page tools with user approval | Monitors Codex tasks, shows thinking, unread results, input requests, errors, idle states |
| UI Modes | Floating launcher, docked copilot, fullscreen assistant | Menu-bar interface with task queue |
| Theming & Styling | Three-layer token tree, dark mode, live theme editor, Shadow DOM isolation | Native macOS look, no custom theming |
| Privacy | No explicit privacy features; data goes to your backend | Local-first, never uploads prompts, code, responses, or task history |
| Open Source | Yes | Yes |
| Platform | Any web platform | macOS 14+ only |
Pricing
Persona.js: Free and open-source. No pricing tiers; you self-host the backend. Optional Runtype CLI and proxy services may have separate pricing.
AgentMicro: Free and open-source. No pricing tiers; no account required for base mode.
Pros and Cons
Persona.js
Pros:
- Framework-free, works with any stack
- WebMCP-native for agentic tool use
- Multiple UI modes (floating, docked, fullscreen)
- SSE streaming with pluggable parsers
- Shadow DOM isolation prevents style conflicts
- Extensive theming options
Cons:
- Requires backend setup for chat functionality
- No built-in task management or monitoring
- Not for local desktop use
AgentMicro
Pros:
- Local-first, privacy-focused
- Clear task queue with project and elapsed time
- One-click open in Codex Desktop
- No account or Accessibility permission needed for base mode
- Free and open source
Cons:
- macOS only
- Limited to Codex tasks
- No web or cross-platform support
Verdict
Choose Persona.js if you need to embed an agentic chat UI into a website with WebMCP tool integration. Choose AgentMicro if you're a macOS user who wants to supervise Codex tasks locally with privacy and efficiency.