# Show HN: I compared 15 AI agent frameworks across 4 production stacks

> Source: <https://compare-lab.xyz/ai-agent-frameworks/>
> Published: 2026-06-26 15:21:14+00:00

# AI Agent Frameworks, Compared

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](/frameworks/langgraph)

### LangGraph

Graph-based control for stateful LLM agents with explicit transitions and human gates.

[28k+Pythoncontrol: crewstate: message-passingMITrole-based agent teamtask delegationresearchcontent workflow](/frameworks/crewai)

### CrewAI

Role-based crew orchestration with sequential or hierarchical task delegation.

[35k+Python / .NETcontrol: conversationalstate: message-passingMITmulti-agent chatcode generation agentresearchtool use](/frameworks/autogen)

### AutoGen

Conversational multi-agent framework from Microsoft Research with deep tool use.

[6k+Pythoncontrol: code-firststate: explicit-graphMITtyped structured outputfunction callingproduction appvalidation](/frameworks/pydantic-ai)

### Pydantic AI

Typed agents built on Pydantic validation. Production-first, structured output as first class.

[8k+Python / TypeScriptcontrol: code-firststate: implicitMITOpenAI-first stackhandoff patternguardrailstracing](/frameworks/openai-agents-sdk)

### 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](/frameworks/mastra)

### Mastra

TypeScript-native framework with workflows, agents, RAG, and built-in eval.

[13k+TypeScriptcontrol: code-firststate: implicitApache 2.0streaming UIchat interfaceNext.js appedge runtime](/frameworks/vercel-ai-sdk)

### Vercel AI SDK

TypeScript SDK with streaming UI primitives and provider abstraction.

[94k+Python / TypeScriptcontrol: code-firststate: implicitMITRAGprototypebroad integrationchain composition](/frameworks/langchain)

### LangChain

The original LLM framework. Broad integration surface, mature ecosystem.

[36k+Python / TypeScriptcontrol: code-firststate: implicitMITRAGindex managementdata agentknowledge base](/frameworks/llamaindex)

### LlamaIndex

Data-first framework. Strongest for RAG and structured data agent.

[17k+Pythoncontrol: code-firststate: explicit-graphApache 2.0production RAGpipeline compositionenterprise search](/frameworks/haystack)

### 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](/frameworks/dify)

### 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](/frameworks/flowise)

### 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](/frameworks/n8n)

### n8n

Workflow automation with AI agent nodes. Strong integration library.

[21k+.NET / Python / Javacontrol: code-firststate: implicitMIT.NET stackenterpriseskill orchestrationplugin](/frameworks/semantic-kernel)

### Semantic Kernel

Microsoft enterprise SDK. .NET / Python / Java with plugin orchestration.

[12k+Pythoncontrol: code-firststate: implicitApache 2.0minimal footprintcode agenttool useHF ecosystem](/frameworks/smolagents)

### smolagents

Hugging Face minimal agent framework. Code-as-action approach, small footprint.