7 tools21 comparisons
Best LLM Frameworks Tools(2026)
Build LLM-powered applications with chains, agents, and RAG pipelines. We compared 7tools so you don't have to.
LangChain
From $0
Framework for building LLM-powered applications
Chains and agentsRAG supportMemory management
LlamaIndex
From $0
Data framework for LLM applications
RAG pipelines100+ data connectorsMulti-modal support
Haystack
From $0
Open-source LLM framework for production pipelines
Modular pipeline architectureDocument storesRetrieval pipelines
Semantic Kernel
From $0
Microsoft's open-source AI SDK for .NET, Python, and Java
Plugin architectureMemory managementMulti-agent orchestration
AutoGen
From $0
Multi-agent conversation framework by Microsoft
Multi-agent conversationsHuman-in-the-loopCode execution
CrewAI
From $0
Role-based multi-agent framework
Role-based agentsTask delegationProcess types (sequential/hierarchical)
Vercel AI SDK
From $0
TypeScript SDK for building AI-powered web apps
Streaming RSCuseChat / useCompletion hooksMulti-provider (OpenAI, Anthropic, Mistral)
Head-to-head
LLM Frameworks Comparisons
LangChain vs LlamaIndexLangChain vs HaystackLangChain vs Semantic KernelLangChain vs AutoGenLangChain vs CrewAILangChain vs Vercel AI SDKLlamaIndex vs HaystackLlamaIndex vs Semantic KernelLlamaIndex vs AutoGenLlamaIndex vs CrewAILlamaIndex vs Vercel AI SDKHaystack vs Semantic KernelHaystack vs AutoGenHaystack vs CrewAIHaystack vs Vercel AI SDKSemantic Kernel vs AutoGenSemantic Kernel vs CrewAISemantic Kernel vs Vercel AI SDKAutoGen vs CrewAIAutoGen vs Vercel AI SDKCrewAI vs Vercel AI SDK