Last Updated: April 2026

Google's Agent Development Kit is a code-first framework for building, evaluating, and deploying sophisticated agents, especially around Gemini and agent-to-agent workflows.
Autogen MicrosoftAutogen is a open source framework for building AI agents in Python and .NET.
ElizaEliza is an open source conversational AI agent for Twitter, Discord, and other platforms through integrations.
phidataphidata is a framework and interface for building AI agents with 'memory, knowledge, tools and reasoning'.
Google's Agent Development Kit is a code-first framework for building, evaluating, and deploying sophisticated agents, especially around Gemini and agent-to-agent workflows. It is especially notable for good fit for google-stack agent builders.
Google Agent Development Kit appears to be open-source or GitHub-first, which makes it a better fit for developers who want more control over architecture, tooling, and deployment.
Google Agent Development Kit appears to support tools, workflows, or external integrations, which makes it more useful for real task execution than a chat-only agent.
Google Agent Development Kit looks best suited to developers and technical teams building agents, workflows, or automation systems. It is more infrastructure-oriented than end-user assistant oriented.
CrewAI is a popular framework for building multi-agent systems where specialized agents collaborate on complex business and automation workflows.
LangGraph is a graph-based orchestration framework for building stateful, long-running AI agents with retries, branching, and human-in-the-loop control.
OpenAI Agents SDK is a lightweight framework for building tool-using and multi-agent workflows with handoffs, tracing, and guardrails.
Agent Zero is a general-purpose AI agent framework that can use the terminal, browser, files, and reusable skills to complete autonomous tasks.
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