Side-by-side comparison of 15 AI agent frameworks. Filter by use case (RAG, multi-agent, structured output) and language (Python, TypeScript, .NET). Updated weekly.
12k+Python / TypeScriptcontrol: graphstate: explicit-graphMITmulti-step agenthuman-in-the-loopstateful workflowRAG agent
LangGraph
Graph-based control for stateful LLM agents with explicit transitions and human gates.
28k+Pythoncontrol: crewstate: message-passingMITrole-based agent teamtask delegationresearchcontent workflow
CrewAI
Role-based crew orchestration with sequential or hierarchical task delegation.
35k+Python / .NETcontrol: conversationalstate: message-passingMITmulti-agent chatcode generation agentresearchtool use
AutoGen
Conversational multi-agent framework from Microsoft Research with deep tool use.
6k+Pythoncontrol: code-firststate: explicit-graphMITtyped structured outputfunction callingproduction appvalidation
Pydantic AI
Typed agents built on Pydantic validation. Production-first, structured output as first class.
8k+Python / TypeScriptcontrol: code-firststate: implicitMITOpenAI-first stackhandoff patternguardrailstracing
OpenAI Agents SDK
OpenAI official SDK with handoffs, guardrails, and built-in tracing UI.
10k+TypeScriptcontrol: code-firststate: explicit-graphElastic License 2.0TypeScript stackNext.js integrationworkflow with stepseval
Mastra
TypeScript-native framework with workflows, agents, RAG, and built-in eval.
13k+TypeScriptcontrol: code-firststate: implicitApache 2.0streaming UIchat interfaceNext.js appedge runtime
Vercel AI SDK
TypeScript SDK with streaming UI primitives and provider abstraction.
94k+Python / TypeScriptcontrol: code-firststate: implicitMITRAGprototypebroad integrationchain composition
LangChain
The original LLM framework. Broad integration surface, mature ecosystem.
36k+Python / TypeScriptcontrol: code-firststate: implicitMITRAGindex managementdata agentknowledge base
LlamaIndex
Data-first framework. Strongest for RAG and structured data agent.
17k+Pythoncontrol: code-firststate: explicit-graphApache 2.0production RAGpipeline compositionenterprise search
Haystack
Pipeline-based framework from deepset. Production search and RAG focus.
53k+TypeScript / Pythoncontrol: low-codestate: explicit-graphCustom (open-core)no-code agentworkflow builderteam collaborationself-host
Dify
Open-source LLM app platform with visual workflow builder. Self-hostable.
32k+TypeScriptcontrol: low-codestate: explicit-graphApache 2.0drag-drop chain builderno-codeprototypeself-host
Flowise
Drag-and-drop LangChain workflow builder. Open source, self-host first.
65k+TypeScriptcontrol: low-codestate: event-drivenSustainable Use Licenseworkflow automationAI agent nodeself-hostAPI integration
n8n
Workflow automation with AI agent nodes. Strong integration library.
21k+.NET / Python / Javacontrol: code-firststate: implicitMIT.NET stackenterpriseskill orchestrationplugin
Semantic Kernel
Microsoft enterprise SDK. .NET / Python / Java with plugin orchestration.
12k+Pythoncontrol: code-firststate: implicitApache 2.0minimal footprintcode agenttool useHF ecosystem
smolagents
Hugging Face minimal agent framework. Code-as-action approach, small footprint.