Agent building: full ranking
Every tool numbered by AgentPick Score (0–100), our data score from public GitHub activity.
| # | Tool | What it does | Score | Stars | Updated |
|---|---|---|---|---|---|
| #1 | LangChain | The agent engineering platform. | 97 | ★ 148k | 14 Oct 2026 |
| #2 | CrewAI | Open-source multi-agent framework. This release adds a `crewai eval` command that reports where a stopped model broke, uses the LiteLLM cata… | 92 | ★ 60k | 14 Oct 2026 |
| #3 | Agno | Open-source agent framework and runtime. This release makes ClaudeAgent sessions resumable on any replica via database-stored transcripts, a… | 91 | ★ 43k | 14 Oct 2026 |
| #4 | LangGraph | LangChain's MIT-licensed framework for building stateful, controllable agents as graphs ("Build resilient agents"). Version 1.2.15 was publi… | 90 | ★ 43k | 15 Oct 2026 |
| #5 | DSPy | DSPy: The framework for programming—not prompting—language models | 90 | ★ 39k | 14 Oct 2026 |
| #6 | CopilotKit | The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol | 89 | ★ 38k | 14 Oct 2026 |
| #7 | LlamaIndex | LlamaIndex is the document processing platform for AI | 88 | ★ 53k | 14 Oct 2026 |
| #8 | agentscope | Build and run agents you can see, understand and trust. | 88 | ★ 33k | 14 Oct 2026 |
| #9 | Haystack | Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agen… | 88 | ★ 27k | 14 Oct 2026 |
| #10 | Google Agent Development Kit | Google's open-source agent framework. Release notes claim 40% faster time to first model request in long sessions, an after_tool_callback to… | 88 | ★ 22k | 14 Oct 2026 |
| #11 | Pydantic AI ✓ | Open-source Python agent framework from the Pydantic team. This release lets Skills layer project and personal libraries, runs BrowserUse on… | 88 | ★ 21k | 15 Oct 2026 |
| #12 | LangChain Deep Agents ✓ | Adds pinning skills by name (pinned_skills) and fixes skills middleware so each subagent gets its own. | 87 | ★ 30k | 14 Oct 2026 |
| #13 | OpenAI Agents SDK | OpenAI's open-source Python framework for multi-agent workflows. 0.23.1 is a patch release that restores release tests and a readiness check… | 86 | ★ 30k | 15 Oct 2026 |
| #14 | Mastra core | Open-source TypeScript agent framework. This release adds a FactorySandbox contract with Docker, E2B and Mastra Platform sandbox providers, … | 86 | ★ 29k | 15 Oct 2026 |
| #15 | Semantic Kernel | Integrate cutting-edge LLM technology quickly and easily into your apps | 86 | ★ 29k | 14 Oct 2026 |
| #16 | eliza | Open source agentic operating system | 85 | ★ 20k | 14 Oct 2026 |
| #17 | ag-ui | AG-UI: the Agent-User Interaction Protocol. Bring Agents into Frontend Applications. | 85 | ★ 17k | 14 Oct 2026 |
| #18 | Microsoft Agent Framework | Microsoft's open-source framework for building agents and multi-agent workflows (Python and .NET). 1.21.0 adds tool-result standing guidance… | 85 | ★ 14k | 14 Oct 2026 |
| #19 | omnigent | Omnigent is an open-source AI agent framework and meta-harness: orchestrate Claude Code, Codex, Cursor, Pi, and custom agents — swap harness… | 84 | ★ 11k | 15 Oct 2026 |
| #20 | harness-sdk | Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScript - any model, any cloud. | 83 | ★ 8.8k | 14 Oct 2026 |
| #21 | adk-go | An open-source, code-first Go toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control. | 82 | ★ 8.9k | 14 Oct 2026 |
| #22 | PraisonAI | PraisonAI 🦞 — Hire a 24/7 AI Workforce. Stop writing boilerplate and start shipping autonomous self-improving agents that research, plan, c… | 81 | ★ 9.2k | 14 Oct 2026 |
| #23 | agentscope-java | Build distributed, production-grade, long-running agents. | 81 | ★ 6k | 14 Oct 2026 |
| #24 | voltagent | AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework | 80 | ★ 11k | 13 Oct 2026 |
| #25 | ruby_llm | The Ruby-native AI framework. | 79 | ★ 4.5k | 14 Oct 2026 |
| #26 | docmost | Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion. | 77 | ★ 22k | 14 Oct 2026 |
| #27 | ClawX | ClawX is a desktop app that provides a graphical interface for OpenClaw AI agents. It turns CLI-based AI orchestration into a desktop experi… | 77 | ★ 7.6k | 14 Oct 2026 |
| #28 | Backlog.md | Backlog.md - A tool for managing project collaboration between humans and AI Agents in a git ecosystem | 77 | ★ 7k | 14 Oct 2026 |
| #29 | maka | Apache Maka (Incubating) is a high-performance agent workspace that keeps a complete record of everything it did. | 77 | ★ 5.7k | 14 Oct 2026 |
| #30 | OpenExecutive | AI-powered virtual executive team — a single coherent executive persona backed by 8 specialist agents (FastAPI + Next.js). | 77 | ★ 5.6k | 14 Oct 2026 |
| #31 | thunderbolt | AI You Control: Choose your models. Own your data. Eliminate vendor lock-in. | 77 | ★ 4.8k | 14 Oct 2026 |
| #32 | koog | Koog is a JVM (Java and Kotlin) framework for building predictable, fault-tolerant and enterprise-ready AI agents across all platforms – fro… | 77 | ★ 4.6k | 13 Oct 2026 |
| #33 | langroid | Harness LLMs with Multi-Agent Programming | 77 | ★ 4.1k | 14 Oct 2026 |
| #34 | LazyLLM | Easiest and laziest way for building multi-agent LLMs applications. | 77 | ★ 3.9k | 13 Oct 2026 |
| #35 | ai | 🤖 Type-safe, provider-agnostic TypeScript AI SDK for streaming chat, tool calling, agents, and multimodal apps across OpenAI, Anthropic, Ge… | 77 | ★ 3.2k | 14 Oct 2026 |
| #36 | agent-lightning | The absolute trainer to light up AI agents. | 76 | ★ 19k | 9 Oct 2026 |
| #37 | sphere-sdk | The SDK for autonomous economic agents. Give an agent an identity, a wallet, and the ability to find, negotiate with, and settle with other … | 76 | ★ 5.4k | 14 Oct 2026 |
| #38 | Olares | Open-Source Personal Cloud OS for Always-On Agents | 76 | ★ 5.3k | 14 Oct 2026 |
| #39 | cli-printing-press | Every API has a secret identity. This finds it, absorbs every feature from every competing tool, then builds the GOAT CLI — designed for AI … | 76 | ★ 4.8k | 13 Oct 2026 |
| #40 | embabel-agent | Agent framework for the JVM. Pronounced Em-BAY-bel /ɛmˈbeɪbəl/ | 76 | ★ 4.5k | 14 Oct 2026 |
| #41 | OpenBiliClaw | 本地私有、开源的自进化跨平台 AI 内容发现 Agent：先理解你，再主动从 B站、小红书、抖音、YouTube、X、知乎、Reddit、微博等平台与开放 Web 寻找内容。（支持 deepseek harness 插件） | Local-first open-source cr… | 76 | ★ 3.4k | 14 Oct 2026 |
| #42 | MemMachine | Universal memory layer for AI Agents. It provides scalable, extensible, and interoperable memory storage and retrieval to streamline AI agen… | 76 | ★ 3.1k | 13 Oct 2026 |
| #43 | workflow | Workflow SDK: Build durable, reliable, and observable apps and AI Agents in TypeScript | 76 | ★ 2.5k | 14 Oct 2026 |
| #44 | memanto | Memory that AI Agents Love! | 76 | ★ 2.3k | 14 Oct 2026 |
| #45 | trulens | Evaluation and Tracking for LLM Experiments and AI Agents | 75 | ★ 3.6k | 13 Oct 2026 |
| #46 | beeai-framework | Build production-ready AI agents in both Python and Typescript. | 75 | ★ 3.4k | 14 Oct 2026 |
| #47 | mercury-agent | Soul-driven AI agent with permission-hardened tools, token budgets, and multi-channel access. Runs 24/7 from CLI, Telegram or More. | 75 | ★ 3.4k | 14 Oct 2026 |
| #48 | argent | An agentic toolkit to control, debug, and profile iOS and Android apps. Made by Software Mansion. | 75 | ★ 3k | 14 Oct 2026 |
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