CopilotKit vs Pi Agent Core
CopilotKit and Pi Agent Core are both agent frameworks. CopilotKit is published by CopilotKit and Pi Agent Core by Earendil. On GitHub, Pi Agent Core has 117,586 stars and CopilotKit has 38,211. Both were last active in Oct 2026. The table lines up where they differ (publisher, weekly downloads and category) 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. Pi Agent Core: Minimal TypeScript agent harness with an agent runtime, multi-provider LLM API, terminal UI and coding agent CLI that users extend themselves. Licenses: CopilotKit MIT, Pi Agent Core 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.
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.
Who should pick which
- Pick CopilotKit if you want MCP support built in.
- Pick Pi Agent Core if you want a stable release (CopilotKit is marked beta).
- Pi Agent Core has the larger community: 117,586 GitHub stars against 38,211.
From listing data only. We don't pick a winner on security beyond the grades; read how grades work.
Side by side
| Fact | CopilotKit | Pi Agent Core |
|---|---|---|
| Type | Harness | Harness |
| Publisher | CopilotKit | Earendil |
| 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 | 117,586 |
| Weekly downloads | 286,211 | 5,107,393 |
| Last release | Oct 16, 2026 | Oct 21, 2026 |
| Last activity | Oct 24, 2026 | Oct 24, 2026 |
Facts from each listing's public sources, checked daily. Tool lists arrive with tool scans.
Install
CopilotKit
npm install @copilotkit/react-core
Pi Agent Core
npm install @earendil-works/pi-agent-core
Also consider
- 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 - 0.756score
ai
TanStack
TypeScript SDK for streaming chat, tool-calling agents and structured output across model providers and UI frameworks.
HarnessAFreshness: A★ 3.2K
Questions
- Is CopilotKit or Pi Agent Core more popular?
- Pi Agent Core has more GitHub stars (117,586 against 38,211). Stars measure attention, not quality, so check freshness and docs too.
- Are CopilotKit and Pi Agent Core open source?
- Yes: CopilotKit is MIT and Pi Agent Core is MIT.
Related
Cite this page
CopilotKit vs Pi Agent Core. Agent Mart. https://agentmart.dev/compare/copilotkit-vs-pi-agent-core (last updated 2026-10-26)