Best Agent Building Tools

Open-source LLM app platform with visual orchestration

ByteDance's no-code agent builder

The open-source library for browser-driving agents

Multi-agent orchestration framework

Open-source KB QA from FIT2CLOUD

Deep-document-understanding RAG engine

Self-hostable workflow automation with AI nodes

Microsoft's multi-agent conversation framework

Graph orchestration for reliable agents

China's open-source knowledge-base QA platform

Microsoft's SDK for building AI agents

Hugging Face's minimalist agent library

Agent framework by the Pydantic team

Pioneering open-source multi-agent society framework

Alibaba's multi-agent development framework

Visual drag-and-drop builder for LLM apps

Stateful agents with long-term memory, from MemGPT

Registry to find and install MCP servers

250+ tool integrations for AI agents

MCP server directory with security scans

MCP server directory and ecosystem news

Tool-calling platform with auth for AI agents

The most popular LLM app framework

Lightweight, fast framework for multi-modal agents

Largest directory of MCP servers

Drag-and-drop LLM orchestration, open source

Multi-agent framework that simulates a software company