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Alternatives to CopilotKit

CopilotKit is an agent framework by 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. If it doesn't fit your setup, these 12 agent frameworks cover similar ground. They are ordered by how closely they match CopilotKit and by our rank, which weighs adoption, freshness and documentation; money never changes the order. Pi Agent Core leads the list (more GitHub stars (117.6K)). Each entry shows data reasons to switch, and you can open a side-by-side comparison with CopilotKit.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

You're replacing

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.

12 alternatives

Ordered by how closely each matches CopilotKit (shared product, category or stated alternative) and by rank.

  1. 1
    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.

    • More GitHub stars (117.6K)

    ★ 117.6K↓ 5.1M/wkLast active Oct 24, 2026Compare →

  2. 2
    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.

    • 25.2K GitHub stars
    • Active in the last 30 days

    ★ 25.2K↓ 40.7K/wkLast active Oct 18, 2026Compare →

  3. 3
    trueforge

    truefoundry

    Open-source agent harness that runs the model loop for you, with MCP tools, skills, sandboxing, approvals and a chat UI.

    • 6.4K GitHub stars
    • Active in the last 30 days

    ★ 6.4KLast active Oct 24, 2026

  4. 4
    ai

    TanStack

    TypeScript SDK for streaming chat, tool-calling agents and structured output across model providers and UI frameworks.

    • 3.2K GitHub stars
    • Active in the last 30 days

    ★ 3.2KLast active Oct 24, 2026

  5. 5
    Deep Agents

    LangChain

    Opinionated agent harness on LangGraph with sub-agents, filesystem access, context management, persistent memory and approval of tool calls.

    • Supports Python

    ★ 30.6K↓ 1.9M/wkLast active Oct 24, 2026Compare →

  6. 6
    Mastra

    Mastra

    TypeScript framework for AI agents and apps with graph-based workflows, memory, suspend-and-resume approvals, MCP servers and model routing.

    • 29.1K GitHub stars
    • Active in the last 30 days

    ★ 29.1K↓ 1.4M/wkLast active Oct 24, 2026Compare →

  7. 7
    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.

    • Supports Python and Go

    ★ 25.8K↓ 996K/wkLast active Oct 23, 2026Compare →

  8. 8
    Vercel AI SDK

    Vercel

    TypeScript toolkit for AI apps and agents with a unified provider API, streaming, UI hooks and a wrapper for running established agent harnesses.

    • 27.5K GitHub stars
    • Active in the last 30 days

    ★ 27.5KLast active Oct 23, 2026

  9. 9
    LangGraph.js

    LangChain

    Open-source agent harness from LangChain for building agents with code, with LangSmith for testing and monitoring.

    • 3.4K GitHub stars
    • Active in the last 30 days

    ★ 3.4K↓ 2.3M/wkLast active Oct 22, 2026

  10. 10
    Claude Agent SDK (TypeScript)

    Anthropic

    TypeScript SDK that gives programs Claude Code's built-in tools for reading, editing and running code, installed from npm.

    • 1.8K GitHub stars
    • Most weekly downloads here (8.1M)

    ★ 1.8K↓ 8.1M/wkLast active Oct 23, 2026Compare →

  11. 11
    trigger.dev

    triggerdotdev

    TypeScript platform to build and deploy long-running AI agents and workflows with retries, queues and human approval steps.

    • Supports JavaScript

    ★ 16.6KLast active Oct 24, 2026

  12. 12
    OpenAI Agents SDK (JavaScript)

    OpenAI

    TypeScript and JavaScript framework for multi-agent workflows with tools, handoffs, guardrails, sandboxes and voice agents.

    • Supports JavaScript

    ★ 3.9K↓ 1.2M/wkLast active Oct 21, 2026

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