Semantic Kernel
Microsoft's SDK for composing AI skills, plugins, and agents into enterprise applications.
Semantic Kernel is Microsoft's agent and orchestration SDK, with first-class support for C# alongside Python and Java. It treats capabilities as plugins the model can call, and adds planners that assemble those plugins toward a goal.
Its centre of gravity is the enterprise .NET world, where it brings agents into existing Microsoft-stack applications.
Where it fits
The natural choice for .NET and enterprise Microsoft shops bringing agents into existing applications.
Where it does not fit
Less compelling for a Python-first or JavaScript team with no Microsoft-stack ties.
Alternatives to Semantic Kernel
The closest options on the map, and where each fits instead.
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AutoGen Multi-agent conversation
A fit for research-flavoured, exploratory multi-agent work where conversation between agents is the point.
Unlike Semantic Kernel Maturity: growing
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LangGraph Graph orchestration
Reach for LangGraph when an agent needs real branching (loops, retries, human-in-the-loop pauses) and you want that control flow written down explicitly.
Pairs with
Commonly used alongside it.
