More powerful browser-operating autonomous agent capabilities, but operates as a closed cloud service rather than local software.
#1CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. Hermes-Agent records 3,638,741 monthly visits with -5.4% growth and Freemium pricing.

Open-source frontend stack for building AI agents and copilots inside your own product
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | copilotkit.ai | hermes-agent.nousresearch.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 403.15K (403,148) | 3.64M (3,638,741) |
| MoM Traffic Delta |
| +268.49K (+199.4%) |
| -208.19K (-5.4%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇺🇸 United States (19.3%) |
|---|
| Direct Visits / mo | 179.26K | 1.05M |
|---|
| User Rating | 4.6 | 4.6 |
|---|
| Supported Platforms | Website | Website |
|---|

Open-source frontend stack for building AI agents and copilots inside your own product
Ship a working copilot UI in minutes with drop-in components for React, Angular, Vue, iOS, and Android, or go fully headless for total control over rendering.
A general-purpose bi-directional link between your app and any agent backend, with integrations for the OpenAI Agents SDK, Claude Agent SDK, LangChain, Google ADK, AWS Strands, Mastra, and many more.
Agents return real UI — charts, forms, tables, and approval prompts rendered with your own design system on the same screen the user is already working in.
Let agents read and write application state, call your frontend functions, and pause for human approval before sensitive actions are executed.
A free, open-source personal AI agent that learns your projects and works across every messaging app.
Hermes keeps conversations, memories, and skills between sessions, and turns solutions it has already found into reusable capabilities you can call again.
Connect Telegram, Discord, Slack, WhatsApp, Signal, email, and the CLI to a single agent with one shared memory, so context follows you across platforms.
Describe recurring reports, backups, or daily briefings in plain language and let them run unattended through the gateway.
Spawn isolated subagents with their own conversations, terminals, and Python RPC scripts to run zero-context-cost pipelines in parallel.
More powerful browser-operating autonomous agent capabilities, but operates as a closed cloud service rather than local software.
#1SpecialistAdvanced visual workflow automation and agent orchestration, but requires more manual node setup than autonomous agents.
#2
Free / Open-sourceSimilar local-first design and chat app connectivity, but lacks Hermes' specific multi-platform messaging framework.
#3
Free / Open-sourceSelf-hosted AI workspace for local and cloud models

Free / Open-sourceGreat team-focused agent workspace integration, but less tailored for individual persistent personal agent task automation.

Free / Open-sourceComprehensive multi-provider chat interface and custom agents, but less specialized for autonomous messaging bot task execution.
SpecialistOpen-source AI automation that unifies agents, flows and 770+ app integrations

Hosted cloud option for always-on agents, but lacks the fully self-hosted open-source flexibility of Hermes.

SpecialistIDE extension providing model-agnostic AI coding assistance rather than a frontend UI component library for web applications.

Free / Open-sourceSelf-driving agent platform you run in your own cloud

Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.

Free / Open-sourceStrong open-source agent workstation with persistent memory, but relies more heavily on Qwen models.

More powerful browser-operating autonomous agent capabilities, but operates as a closed cloud service rather than local software.
SpecialistAdvanced visual workflow automation and agent orchestration, but requires more manual node setup than autonomous agents.
Free / Open-sourceSimilar local-first design and chat app connectivity, but lacks Hermes' specific multi-platform messaging framework.
Free / Open-sourceSelf-hosted AI workspace for local and cloud models
Free / Open-sourceComprehensive multi-provider chat interface and custom agents, but less specialized for autonomous messaging bot task execution.
SpecialistOpen-source AI automation that unifies agents, flows and 770+ app integrations
Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.