Google ADK vs Llama Stack (2026)
Updated March 10, 2026
Overview
Google's Agent Development Kit (ADK) is a modular framework for building AI agents that integrates natively with Gemini models and Vertex AI. It supports multi-agent architectures, tool use, memory, and deployment to Google Cloud, providing an end-to-end solution for building agents in the Google ecosystem.
Llama Stack is Meta's standardized API and SDK for building AI applications on top of Llama models. It provides a unified interface for inference, safety, memory, and agentic workflows — with swappable providers for local, cloud, and on-device deployment. As the official framework for the Llama ecosystem, it is becoming the default for teams building on open-source Llama models.
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Code-first approach enables testable, maintainable agent development
- Comprehensive evaluation framework builds trustworthy agents
- Modular design supports scalable multi-agent architectures
- Open source with active community contributions
Cons
- Optimized primarily for Google Cloud ecosystem
- May be overly structured for simple use cases
- Less flexibility for multi-cloud or non-Google deployments
Pros
- Completely free and open-source framework with permissive licensing
- Unified APIs across multiple service providers simplify deployment
- Recent 50 percent pricing reductions make models more cost-effective
- Strong backing from Meta with partnerships across major tech companies
Cons
- Setup and configuration complexity with build failures reported
- Documentation gaps lead to import errors and confusion
- Windows compatibility issues limit platform support
- Lack of security policies may concern enterprise users
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