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Semantic Kernel

Microsoft's toolkit for building AI assistants and agents into apps, now followed by Microsoft Agent Framework.

What it does

Semantic Kernel is a toolkit from Microsoft for developers who want to add AI to their software. It works with Python, .NET and Java, and can connect to many AI providers, including OpenAI, Azure OpenAI and Hugging Face, as well as local models through Ollama.

Developers can build agents that use tools, remember things and plan steps, and set several agents to work together. It can also connect to databases that search by meaning.

The README says Microsoft Agent Framework is now its successor, and it links to a guide for moving projects over.

Who it's for

Software developers, especially in larger companies, adding AI features to their apps.

Can I use it without coding?

Developers only. It's a programming toolkit and needs an AI provider key. New to this? Start here.

Can I run it?

Cost
Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
Privacy
Your choice: run it on your device or use an online service
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (MIT): Very permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it