CopilotKit vs langchain
langchain is much bigger: 145.7k stars against 37.2k. Over the days we have tracked them CopilotKit moved +9.4% and langchain +2.6%, so CopilotKit is growing faster right now.
CopilotKit leads on noise control and model freedom. langchain does not take any axis by a clear margin.
Stars and commit dates come from our own daily tracking. The six axes are read off each project's documentation by our review pipeline, so they describe what a project says about itself, not what we measured in its code.
Where they stand today
Provides a multi-platform generative UI and shared-state SDK that lets the same agent run across web, mobile, and chat via the AG-UI Protocol.
- Stars
- 37.2k
- Tracked growth
- +9.4%
- Maturity
- ●●●●●
- Last commit
- 10h ago
- Language
- TypeScript
- License
- MIT
- Cost to run
- Your LLM API key (third‑party); optional CopilotKit Cloud (separate pricing).
A broad, production-ready agent framework with a large ecosystem of integrations and modular abstractions to swap models, tools, and retrievers without rewriting application code.
- Stars
- 145.7k
- Tracked growth
- +2.6%
- Maturity
- ●●●●●
- Last commit
- 2h ago
- Language
- Python
- License
- MIT
- Cost to run
- Your API key, per-provider pricing
Six axes, head to head
Each axis runs 0 to 5. The label under a score is what that project's own docs claim, not a category average.
| Axis | CopilotKit | langchain |
|---|---|---|
Context depth How much of your codebase it sees before it answers: the open diff, the diff plus related files, or the whole repository. | ●●●●● File-level context | ●●●●● Diff/file only |
Noise control How it keeps output volume down — severity thresholds, deduplication, incremental runs over new commits only. | ●●●●● Human-in-the-loop | ●●●●● None mentioned |
Customization How far it bends to your team: custom rules, prompts, style guides, per-path config. | ●●●●● Configurable skills & hooks | ●●●●● Config & prompts |
Privacy Whether your code stays on your own infrastructure: fully local, self-hostable, or cloud API only. | ●●●●● Self-hostable (cloud optional) | ●●●●● Cloud-key usage |
Model freedom Whether you can point it at any provider, or it is wired to one. | ●●●●● Bring-your-own key | ●●●●● Multiple providers |
Setup ease What it takes to get a first useful run out of it. | ●●●●● One-command quickstart | ●●●●● One-command start |
Which one to pick
Pick CopilotKit if…
Easy setup — get an agent-powered generative UI in minutes with npx create and plug in your LLM key to deploy across web, mobile, and chat.
- Noise control: Human-in-the-loop (3/5 against 1/5)
- Model freedom: Bring-your-own key (5/5 against 3/5)
Pick langchain if…
Model interoperability — Swap providers and integrations easily to prototype and productionize LLM applications with minimal code changes.
What people want from each one
CopilotKit/CopilotKit
Hacker News: Show HN: CopilotKit- Build in-app AI chatbots and AI-powered textareas drew 197 points and 67 comments.
langchain-ai/langchain
Hacker News: Why we no longer use LangChain for building our AI agents drew 480 points and 297 comments.
Questions people ask
Is CopilotKit better than langchain?
CopilotKit leads on noise control and model freedom. langchain does not take any axis by a clear margin. CopilotKit is worth picking when easy setup — get an agent-powered generative UI in minutes with npx create and plug in your LLM key to deploy across web, mobile, and chat.
Which of CopilotKit and langchain keeps my code private?
CopilotKit: Self-hostable (cloud optional) (4/5). langchain: Cloud-key usage (3/5).
What does each one cost to run?
CopilotKit: Your LLM API key (third‑party); optional CopilotKit Cloud (separate pricing).. langchain: Your API key, per-provider pricing.
Full profiles: CopilotKit/CopilotKit and langchain-ai/langchain. Everything else in Agent SDKs & frameworks.