Comparison Preset
LangGraph is the better fit here because of its superior risk profile and development activity. Its MIT license, single MODERATE vulnerability, and high commit frequency (16x/week) present a more stable and actively maintained project than SmolAgents, which has a CRITICAL vulnerability. LangGraph's design for durable execution and persistence directly addresses enterprise requirements for reliable, long-running systems. The strong bus factor of 8/10 and integration with LangSmith for production tracing further solidify its position as the more mature and defensible choice. The framework's low-level control is also well-suited for building the complex, custom workflows required in enterprise settings.
Overview
The bottom line — what this framework is, who it's for, and when to walk away.
Bottom Line Up Front
LangGraph is a low-level Python orchestration framework for building complex, stateful, and durable AI agents. It provides core benefits like persistence, human-in-the-loop capabilities, and comprehensive memory. While very powerful, it requires familiarity with agent components and offers less abstraction than other frameworks.
SmolAgents is an open-source Python library designed to easily build and run agents with minimal code. It supports both code-execution and tool-calling agents, is model and tool-agnostic, and integrates with Hugging Face Hub. Secure code execution and modality-agnostic capabilities extend its utility.
Best For
Building low-level, long-running, stateful AI agents requiring durable execution and human oversight.
Rapidly building, running, and sharing LLM agents, especially those executing Python code securely.
Avoid If
You are new to agents or need a higher-level abstraction for simpler LLM application development.
Executing untrusted `CodeAgent` prompts without configuring a sandboxed environment.
Strengths
- +Provides durable execution, allowing agents to persist through failures and resume operations.
- +Supports human-in-the-loop interaction, enabling inspection and modification of agent state at any point.
- +Offers comprehensive memory management for both short-term working memory and long-term cross-session memory.
- +Integrates with LangSmith for deep visibility, tracing, debugging, and production deployment of agent systems.
- +Acts as a low-level orchestration runtime, offering fine-grained control over agent workflow and state transitions.
- +Provides a simple API for agent development, with agent logic fitting in approximately 1000 lines of code.
- +Offers first-class support for `CodeAgent`s that write and execute Python code, enabling natural composability.
- +Supports secure code execution in sandboxed environments via Modal, Blaxel, E2B, or Docker.
- +Includes `ToolCallingAgent` support for traditional JSON/text-based tool invocation paradigms.
- +Integrates seamlessly with Hugging Face Hub for sharing and loading agents and tools as Gradio Spaces.
- +Is model-agnostic, supporting Hugging Face Inference providers, OpenAI, Anthropic (via LiteLLM), and local models (Transformers, Ollama).
- +Is modality-agnostic, capable of handling vision, video, and audio inputs for broader application types.
- +Is tool-agnostic, allowing integration with tools from MCP servers, LangChain, or other Hugging Face Spaces.
- +Includes command-line utilities (smolagent, webagent) for quick agent execution without boilerplate code.
Weaknesses
- −It is a very low-level framework, requiring engineers to manage prompts and architecture explicitly.
- −Does not abstract prompts or architecture, demanding familiarity with agent components like models and tools.
- −Has a higher learning curve for those just starting with agents or seeking a more abstract development experience.
- −Potential security risks exist if `CodeAgent` is used to execute untrusted code without configuring a sandboxed environment.
- −Minimalistic abstractions may require more direct coding or boilerplate for highly customized or complex agent workflows.
- −No explicit mention of built-in memory management or long-term conversational state management is provided.
Project Health
Is this project alive, well-maintained, and safe to bet on long-term?
Bus Factor Score
Maintainers
Open Issues
Fit
Does it support the workflows, patterns, and capabilities your team actually needs?
State Management
LangGraph manages state through a graph-based structure allowing for persistence, human intervention, and comprehensive short-term/long-term memory.
no data
Cost & Licensing
What does it actually cost? License type, pricing model, and hidden fees.
License
Perspective
Your expertise shapes what we build next.
We build for engineers who make real architectural decisions. If something is missing, inaccurate, or could be more useful — we want to hear it.
FrameworkPicker — The technical decision engine for the agentic AI era.