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Find the right Agent or Harness for the way you work

Compare agents and harnesses by deployment, pricing, capabilities, official releases, and documented review evidence.

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25 agents and harnesses

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Hermes Agent

Nous Research

An open-source, self-improving autonomous agent that runs across CLI, desktop, messaging, and IDE surfaces.

Reference
Agent + harness
Use
General purpose
Pricing
Open source
Not verified
Latest release
None· None

Mastra

Mastra

A TypeScript framework for building AI agents and applications.

Reference
Agent framework
Use
General purpose
Pricing
Unknown pricing
Not verified
Latest release
None· None

Open Interpreter

Open Interpreter

A provider-agnostic terminal coding agent that can inspect projects, edit files, and run commands.

Reference
Agent + harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

OpenAI Agents SDK

OpenAI

A lightweight SDK for building agentic AI applications with agents, tools, handoffs, guardrails, and tracing.

Reference
Agent framework
Use
General purpose
Pricing
Unknown pricing
Not verified
Latest release
None· None

OpenClaw

OpenClaw Foundation

A self-hosted AI assistant and gateway that connects chat channels, tools, and configurable agent runtimes.

Reference
Agent + harness
Use
General purpose
Pricing
Open source
Not verified
Latest release
None· None

OpenCode

Anomaly

An open-source AI coding agent available in the terminal, desktop app, and IDE extension.

Reference
Agent + harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

OpenHands Agent Canvas

OpenHands

An AI-driven development platform with composable SDK, CLI, and local or cloud interfaces.

Reference
Harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

Pi Coding Agent

Earendil Works

A minimal, customizable agent harness for terminal-based coding workflows.

Reference
Harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

Pydantic AI

Pydantic

A typed, extensible Python AI SDK for building agents and AI applications.

Reference
Agent framework
Use
General purpose
Pricing
Unknown pricing
Not verified
Latest release
None· None

Strands Agents

Strands Agents

A Python and TypeScript SDK for building, managing, evaluating, and deploying AI-powered agents.

Reference
Agent framework
Use
General purpose
Pricing
Unknown pricing
Not verified
Latest release
None· None

Warp

Warp

An agentic development environment that combines a modern terminal with coding-agent workflows.

Reference
Agent + harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

Zed Agent

Zed Industries

Zed’s native coding-agent path, integrated with its editor, terminal, project, tools, and review UI.

Reference
Agent + harness
Use
Coding
Pricing
Unknown pricing
Not verified
Latest release
None· None

How do Agent Skills work?

A skill is a bounded set of instructions and resources that tells an agent when and how to perform a specialized task.