Mastra vs Semantic Kernel

Pick two tools from the same category to compare side-by-side.

	Mastra TypeScript-first agent framework with workflows, RAG, memory, evals.	Semantic Kernel Microsoft's open-source SDK for embedding LLM agents and plugins into .NET, Python, and Java apps.
Category	framework	framework
Vendor type	open source	open source
Pricing	free	free
Strengths	+ First-class TypeScript / Node ergonomics + Provider-agnostic from day one + Batteries-included (RAG, memory, evals)	+ Strong enterprise and multi-language support (.NET, Python, Java) + Plugin/connector model and Azure ecosystem integration + Backed by Microsoft with extensive documentation + Established memory and planner/agent primitives
Tradeoffs	− Younger ecosystem vs LangChain/LangGraph − Less Python community overlap	− Most new investment has shifted to Microsoft Agent Framework − API churn and migration overhead for long-lived projects − Heavier, enterprise-oriented abstractions
Used in stacks	4	0