Last Updated: April 2026

smolagents is Hugging Face's lightweight library for code-first agents with minimal abstractions, tool use, and model-agnostic execution.
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'.
smolagents is Hugging Face's lightweight library for code-first agents with minimal abstractions, tool use, and model-agnostic execution.
smolagents 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.
smolagents appears to support tools, workflows, or external integrations, which makes it more useful for real task execution than a chat-only agent.
smolagents is best for users who want agentic task execution rather than a simple chatbot, but the exact audience leans more technical than casual.
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.
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