AI agents leaderboard.
Agents, frameworks and platforms built for autonomous work. Browse all of them at /ai-agents.
| # | Listing | Category | Stars | Forks | Last push |
|---|---|---|---|---|---|
| 1 | OpenHands Open source platform for software development agents that can run tools and MCP servers. | Developer tools | 90k | 11.9k | Oct 5, 2026 |
| 2 | Aider Terminal AI pair-programming tool that maps a codebase, edits files across many languages, commits to git, and lints and tests automatically with many LLMs. | Developer tools | 49.4k | 5k | May 22, 2026 |
| 3 | LangGraph LangChain framework and platform for building stateful, long-running agents with MCP tool adapters. | Developer tools | 42.7k | 7.3k | Oct 4, 2026 |
| 4 | CopilotKit Agentic frontend stack connecting agents to user-facing apps with generative UI, frontend tools, human-in-the-loop approvals and shared state; supports AG-UI and MCP Apps. | Developer tools | 37.8k | 4.7k | Oct 5, 2026 |
| 5 | Langfuse Open-source engineering platform for agent evaluation and observability with hierarchical traces of LLM, tool and retrieval steps, agent graphs and an MCP server. | Developer tools | 35.4k | 3.9k | Oct 4, 2026 |
| 6 | Semantic Kernel Microsoft SDK for agents and plugins in .NET, Python and Java with MCP support. | Developer tools | 28.6k | 4.8k | Oct 1, 2026 |
| 7 | FastMCP Python framework for building MCP servers and clients quickly. | Developer tools | 28k | 2.4k | Oct 5, 2026 |
| 8 | Vercel AI SDK TypeScript toolkit for AI applications and agents with MCP client support. | Developer tools | 27.1k | 5.3k | Oct 5, 2026 |
| 9 | Letta Platform for stateful agents with long-term memory, formerly MemGPT. | Developer tools | 25k | 2.6k | Sep 10, 2026 |
| 10 | Opik Open-source observability and evaluation platform with full trace trees for multi-step agents and tool calls, LLM-as-judge metrics and an opik-mcp server. | Developer tools | 22.4k | 1.8k | Oct 5, 2026 |
| 11 | Google Agent Development Kit Google framework for building and deploying agents with tools, evaluation and MCP support. | Developer tools | 21.7k | 4.1k | Oct 4, 2026 |
| 12 | Plandex Terminal-based coding agent that plans and executes large multi-step tasks across many files, loading context, running commands and debugging autonomously. | Developer tools | 15.7k | 1.2k | Oct 3, 2025 |
| 13 | Eino Go framework for LLM applications with ChatModelAgent (tool use, ReAct), DeepAgent for multi-step tasks with sub-agents, and interrupt/resume for human-in-the-loop. | Developer tools | 13.2k | 1.1k | Sep 29, 2026 |
| 14 | assistant-ui React primitives for agent chat interfaces with streaming tool calls, branching and generative UI, plus runtime adapters and MCP integration including MCP Apps. | Developer tools | 12.4k | 1.2k | Oct 5, 2026 |
| 15 | Arize Phoenix Open-source observability and evaluation platform for agent development with step-level tracing, LLM-as-judge evals, datasets from traces and experiments. | Developer tools | 11.7k | 1.2k | Oct 4, 2026 |
| 16 | mcp-use Open source library for connecting any LLM to MCP servers and building MCP agents. | Developer tools | 10.7k | 1.5k | Oct 2, 2026 |
| 17 | LangWatch LLM engineering platform for simulation-based agent testing, LLM-as-judge evals and OpenTelemetry trace observability, tracing and mocking tool and MCP calls. | Developer tools | 4.9k | 407 | Oct 4, 2026 |