The best CopilotKit alternatives
8 tools that do a similar job to CopilotKit, 8 of them open source. Each entry says what it does and who it suits, so you can pick the one that fits instead of the most famous.
You're replacing
CopilotKitA TypeScript toolkit for building chat and generative UI on top of AI agents in web, mobile, and chat apps.
- 1
LangGraph
Open source · MIT · ★ 44.3k
A Python framework for building long-running agents that keep state and can resume after failures.
Best for: Python developers building multi-step AI agents that must survive failures or long waits; Teams that want fine-grained control over agent state and execution flow
- 2
assistant-ui
Open source · MIT · ★ 12.9k
A TypeScript/React library for building AI chat interfaces in your app.
Best for: React or Next.js developers adding an AI chat panel to an existing app; Teams that want to style chat UI with their own design system or shadcn/ui
- 3
Tambo
Open source · MIT · ★ 11.2k
React toolkit that lets AI agents render your own components as interactive UI.
Best for: React developers who want an AI chat to show charts, forms, or boards instead of only text; Teams willing to self-host the backend via Docker
- 4
PageIndex
Open source · MIT · ★ 40k
Lets an AI find answers in long documents by reading a table-of-contents-style tree, not vector search.
Best for: Developers building question-answering over long PDFs such as annual reports or manuals; Teams who want retrieved answers to be traceable to explicit sections of a document
- 5
OpenAI Agents SDK
Open source · MIT · ★ 30.5k
A Python SDK for building AI agents that use tools, hand off tasks, and keep conversation history.
Best for: Python developers building multi-step AI workflows; Teams that want agents to call tools and delegate work to other agents
- 6
Page Agent
Open source · MIT · ★ 29.6k
A JavaScript library that adds a natural-language AI agent to any web page you load it on.
Best for: Developers adding an AI copilot to their own web app; Teams wanting to automate repetitive form filling in internal ERP, CRM, or admin tools
- 7
Stagehand
Open source · MIT · ★ 25.9k
TypeScript, Python and Go SDK for letting AI control a web browser to act on and extract data from sites.
Best for: Developers building browser agents that must work on sites they do not control; Teams extracting structured data from web pages that lack an API
- 8
LlamaIndex
Open source · MIT · ★ 52.8k
Python framework for building LLM apps that query your own documents and data.
Best for: Python developers building retrieval-augmented generation (RAG) apps over private documents; Teams wanting a modular toolkit where they can swap LLM, embedding and vector store providers
How we pick: tools in the same category that solve the same problem, projects that name each other as alternatives, and open-source projects that describe themselves as an alternative to CopilotKit. We don't take payment for placement.