Semantic KernelvsWeaviate

Full side-by-side comparison — features, pricing, platforms, and which one wins in 2026.

Semantic Kernel

Developer Tools

Microsoft's AI orchestration SDK for building agents with .NET, Python, and Java

Weaviate

Vector Databases

Open-source vector database with built-in AI modules

FeatureSemantic KernelWeaviate
CategoryDeveloper ToolsVector Databases
PricingFree (open-source)Free (open-source) + Cloud
GitHub Stars
More stars
23k
12k
PlatformsLinux, macOS, WindowsLinux, Docker, Web
Key Features
  • Plugin system
  • Memory
  • Planner
  • Multi-language
  • Azure integration
  • Vector search
  • Hybrid search
  • AI modules
  • GraphQL
  • Multi-tenancy
Pros
  • + Enterprise-ready with Microsoft backing
  • + Multi-language (C#, Python, Java)
  • + Deep Azure OpenAI integration
  • + Plugin architecture for extensibility
  • + Built-in AI modules
  • + Hybrid search capability
  • + GraphQL API
  • + Multi-tenancy
  • + Active development
Cons
  • Heavy enterprise focus
  • Verbose API compared to alternatives
  • Complex configuration
  • Resource heavy
  • Cloud pricing unclear
  • Smaller community than Pinecone
Tags
microsoftsdkenterprisedotnet
vector-dbsearchgraphqlopen-source

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