Spring AI
Spring framework for building AI applications in Java/Kotlin
Verdict
Brings the Spring ecosystem to AI. Familiar paradigms for Java teams — auto-configuration, dependency injection, and testability. Supports all major model providers. Growing fast.
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- HaystackStable
Deepset open-source NLP framework for production LLM pipelines
- Semantic KernelProduction
Microsoft's enterprise SDK for AI apps (.NET, Python, Java)
- InstructorProduction
Structured outputs from LLMs using Pydantic schemas