CopilotKit vs stagehand
CopilotKit and stagehand are both agent frameworks. CopilotKit is published by CopilotKit and stagehand by browserbase. On GitHub, CopilotKit has 38,211 stars and stagehand has 25,800. Both were last active in Oct 2026. The table lines up where they differ (publisher, weekly downloads and languages) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. CopilotKit describes itself as: Open-source SDK that connects AI agents to app front ends with chat UI, generative UI, shared state and human approvals; creator of the AG-UI protocol. stagehand: SDK for browser agents with act, observe and extract calls, used from TypeScript and Python to automate sites and pull out structured data. Licenses: CopilotKit MIT, stagehand MIT.
Updated Oct 26, 2026 · Built from catalog data; how we rank and grade
CopilotKit
CopilotKit
Open-source SDK that connects AI agents to app front ends with chat UI, generative UI, shared state and human approvals; creator of the AG-UI protocol.
stagehand
browserbase
SDK for browser agents with act, observe and extract calls, used from TypeScript and Python to automate sites and pull out structured data.
Who should pick which
- Pick CopilotKit if you want MCP support built in.
- Pick stagehand if you work in Python and Go.
- Pick stagehand if you want a stable release (CopilotKit is marked beta).
From listing data only. We don't pick a winner on security beyond the grades; read how grades work.
Side by side
| Fact | CopilotKit | stagehand |
|---|---|---|
| Type | Harness | Harness |
| Publisher | CopilotKit | browserbase |
| License | MIT | MIT |
| Pricing | Not stated | Not stated |
| Runs | Not stated | Not stated |
| Auth | Not stated | Not stated |
| Hosts supported | Not stated | Not stated |
| Tools | Not listed yet | Not listed yet |
| Security grade | –Security: not graded yet | –Security: not graded yet |
| Freshness grade | AFreshness: A | AFreshness: A |
| GitHub stars | 38,211 | 25,800 |
| Weekly downloads | 286,211 | 996,024 |
| Last release | Oct 16, 2026 | Oct 23, 2026 |
| Last activity | Oct 24, 2026 | Oct 23, 2026 |
Facts from each listing's public sources, checked daily. Tool lists arrive with tool scans.
Install
CopilotKit
npm install @copilotkit/react-core
stagehand
npm install @browserbasehq/stagehand
Also consider
- 0.867score
Pi Agent Core
Earendil
Minimal TypeScript agent harness with an agent runtime, multi-provider LLM API, terminal UI and coding agent CLI that users extend themselves.
HarnessAFreshness: A★ 117.6K↓ 5.1M/wk - 0.799score
Letta
Letta
Open-source agent harness for stateful agents whose memory persists and improves with use, with a terminal UI, app server and TypeScript SDK.
HarnessAFreshness: A★ 25.2K↓ 40.7K/wk - 0.787score
trueforge
truefoundry
Open-source agent harness that runs the model loop for you, with MCP tools, skills, sandboxing, approvals and a chat UI.
HarnessAFreshness: A★ 6.4K
Questions
- Is CopilotKit or stagehand more popular?
- CopilotKit has more GitHub stars (38,211 against 25,800). Stars measure attention, not quality, so check freshness and docs too.
- Are CopilotKit and stagehand open source?
- Yes: CopilotKit is MIT and stagehand is MIT.
Related
- AlternativesAlternatives to CopilotKit
- AlternativesAlternatives to stagehand
- Best ofBest agent frameworks for TypeScript
- Best ofBest agent frameworks for Python
- ComparisonCopilotKit vs Pi Agent Core
- ComparisonCopilotKit vs Letta
- ComparisonCopilotKit vs Deep Agents
- ComparisonPi Agent Core vs stagehand
- ComparisonLangChain vs stagehand
Cite this page
CopilotKit vs stagehand. Agent Mart. https://agentmart.dev/compare/copilotkit-vs-stagehand (last updated 2026-10-26)