Semantic Kernel alternatives

The 6 best alternatives to Semantic Kernel

Each tool below is a same-category competitor. Click Compare for a side-by-side breakdown against Semantic Kernel.

• 

  LangGraphFreemium

  A low-level orchestration framework for building stateful, multi-step agent workflows with explicit control over state, branching, and human-in-the-loop steps.

  • Explicit control over agent state and branching
  • First-class human-in-the-loop and checkpointing
  Compare to Semantic KernelVisit
• 

  CrewAIFreemium

  A framework for orchestrating role-based multi-agent teams, where specialized agents collaborate on a task under a defined process.

  • Intuitive role-based multi-agent model
  • Fast to prototype with
  Compare to Semantic KernelVisit
• 

  LlamaIndexFreemium

  A data framework for connecting LLMs to private and enterprise data — ingestion, indexing, retrieval, and agent workflows over your own content.

  • Deep, well-documented retrieval toolkit
  • Handles complex and messy document types
  Compare to Semantic KernelVisit
• 

  Microsoft AutoGenFree

  An open-source framework from Microsoft Research for building multi-agent applications, where agents converse to solve tasks together.

  • Mature multi-agent conversation patterns
  • Backed by Microsoft Research
  Compare to Semantic KernelVisit
• 

  OpenAI AgentKitFreemium

  OpenAI first-party agent toolkit — a visual Agent Builder, embeddable ChatKit UI, a connector registry, and evals, billed at plain API rates.

  • No platform fee on top of API usage
  • Visual workflow builder with versioning
  Compare to Semantic KernelVisit
• 

  HaystackFreemium

  An open-source framework from deepset for building production LLM applications — RAG, search, and agents — built around composable pipelines.

  • Explicit, testable pipeline architecture
  • Mature retrieval and evaluation tooling
  Compare to Semantic KernelVisit