Updated April 2026

Best Multi-Agent Framework for Java

Java multi-agent frameworks are concentrated around Microsoft Semantic Kernel's Java SDK and Google ADK's Java implementation. Both are usable in production; Semantic Kernel has broader ecosystem maturity, Google ADK has the most native A2A protocol support. Pick based on which cloud you are deploying to.

Constraint: Java stacks narrow to Semantic Kernel or Google ADK.

Top picks for Java

  1. #1
    Microsoft Semantic Kernel

    ×1.2 overhead

  2. #2
    Google Agent Development Kit

    ×1.2 overhead

Starter scaffolds

Buzzi ships Java-compatible starter scaffolds for the top picks above. Run the wizard to download a 2-agent hello-world ZIP customised to your task pattern.

Run the selector

FAQ

  1. Which multi-agent framework is best for Java?

    Java stacks narrow to Semantic Kernel or Google ADK. The wizard ranks every viable option for your specific workload.

  2. Can I switch frameworks after starting in Java?

    Yes, but the cost is real — most agent code couples to its framework's primitives. Pick once, deliberately.

  3. Does Java performance differ across frameworks?

    Marginally. Token costs dominate runtime; framework-level overhead is a small fraction of total cost in most workloads.

  4. Are the recommendations for Java the same as Python?

    No — language-specific constraints can rule frameworks out entirely. See the constraints note above.