AgentIndex icon
AgentIndex
cua logo
cua
★ 30.7k
vs
harnessrouter logo
harnessrouter
★ 3.2k

cua vs harnessrouter

cua: Cua is an open-source platform designed for building, benchmarking, and deploying AI agents capable of interacting with any computer. It provides isolated, self-hostable sandboxes using technologies like Docker, QEMU, and Apple Vz for agentic UI automation and secure code execution.; harnessrouter: HarnessRouter provides a unified infrastructure layer that transforms various agent harnesses (like Codex and Claude Code) into plug-and-play backends, enabling products to run tasks, retrieve results, and switch between harnesses via a single API. It implements the Unified Harness Protocol (UHP) and offers an OpenAI Responses-compatible API for managing persistent sessions, streaming progress, files, and task lifecycle without complex harness engineering.

01

TL;DR

cua logo
cuaLLM Infra · ★ 30.7k
When to choose:
  • You are building Computer-Use agents and need robust, self-hostable isolated desktop/VM sandboxes (Docker, QEMU, Apple Vz).
  • You need native app operating drivers, standardized benchmarking harnesses, and secure isolation for autonomous agent task execution.
When to skip:
  • You only need simple UI macros on your personal physical machine (Windows-MCP or local desktop helpers are easier).
  • Your agents interact solely via text APIs, shell commands, or databases and have no need for a virtual graphical desktop.
Read cua full review →
harnessrouter logo
harnessrouterLLM Infra · ★ 3.2k

Integrating diverse agent backends into a single product API

Read harnessrouter full review →
02

Side-by-Side Comparison

Field
cua logocua
harnessrouter logoharnessrouter
Category
LLM Infra
LLM Infra
Stars
★ 30.7k
★ 3.2k
License
MIT
Apache-2.0
Install Command
curl -fsSL https://cua.ai/install.sh | sh
docker run -d --name harnessrouter -p 127.0.0.1:3000:3000 -v harnessrouter:/data harnessrouter/harnessrouter
Updated
1d ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
AI Agents, Virtualization, UI Automation
Agent Orchestration, LLM Infrastructure, API Gateway
03

Features

cua logocua
01Build AI agents for desktop UI automation and interaction.
02Provide isolated code execution environments (sandboxes).
03Benchmark computer-use models with standardized tasks.
04Train agents using reinforcement learning environments.
05Manage high-performance macOS/Linux VMs on Apple Silicon.
harnessrouter logoharnessrouter
01Unified API for multiple agent harnesses (Codex, Claude Code, etc.)
02OpenAI Responses-compatible API for seamless integration
03Handles persistent sessions, streaming progress, files, and cancellation
04Self-hostable Community Edition with Docker for local control
05Supports custom harness configuration with tools and skills
04

Use Cases

cua logocua
↳Developing and deploying AI agents for autonomous desktop interaction and task completion.
↳Creating secure, isolated code execution environments for AI coding assistants and development workflows.
↳Benchmarking and training computer-use agents using standardized tasks and reinforcement learning.
harnessrouter logoharnessrouter
↳Integrating diverse agent backends into a single product API
↳Building agentic features for knowledge work, such as content creation and data analysis
↳Optimizing cost and latency by switching between different harnesses/models
↳Developing agent-powered starter kits for slides, sheets, dashboards, or videos
↳Self-hosting agent infrastructure to maintain control over data and credentials
05

Best For

cua logocua
Most PopularEssentialTrending
harnessrouter logoharnessrouter
EssentialTrending
FAQ

FAQ

What is the difference between cua and harnessrouter?
Both cua and harnessrouter are in the LLM Infra category. cua has 30.7k stars, while harnessrouter has 3.2k stars.
Which is better, cua or harnessrouter?
The best choice depends on your use case. Choose cua if Developing and deploying AI agents for autonomous desktop interaction and task completion., and harnessrouter if Integrating diverse agent backends into a single product API.
Is cua free or open source?
Yes, cua is open source on GitHub (MIT).
Is harnessrouter free or open source?
Yes, harnessrouter is open source on GitHub (Apache-2.0).
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