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CrewAI

multi-agentframework
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Trial

CrewAI is a Python framework for building multi-agent AI systems using a "crew" metaphor — you define agents with roles, goals, and tools, then assign them tasks that they work on collaboratively.

Buy vs Build

CrewAI is open-source (build), but CrewAI Enterprise offers a hosted, managed version with a visual builder — shifting it toward buy. If your team doesn't want to write Python, CrewAI's visual no-code editor is worth exploring.

Why It's in Trial

CrewAI powers agents for 60% of Fortune 500 companies, raised $18M, and is backed by Andrew Ng's AI Fund. It's widely regarded as the most approachable multi-agent framework for teams new to agent development.

The Crew Mental Model

Instead of thinking in graphs (like LangGraph), CrewAI maps to how human teams work:

  • Agent: An AI with a role ("you are a senior software engineer"), a goal ("write clean, tested code"), and tools it can use (file reader, code executor)
  • Task: A unit of work assigned to one or more agents
  • Crew: The team of agents working together on a project
  • Flow: Deterministic logic that decides how tasks are sequenced

This maps naturally to how software teams are organized, which makes it easier for non-ML engineers to reason about.

When to Choose CrewAI vs LangGraph

  • CrewAI: You're new to multi-agent development; you want fast results; your workflow maps cleanly to roles and tasks
  • LangGraph: You need fine-grained control over conditional branching; you want to inspect every node transition; you're building something complex

Getting Started

pip install crewai

from crewai import Agent, Task, Crew

developer = Agent(
    role="Senior Software Engineer",
    goal="Write clean, tested Python code",
    backstory="You have 10 years of Python experience..."
)

task = Task(
    description="Write a function that validates email addresses",
    agent=developer
)

crew = Crew(agents=[developer], tasks=[task])
result = crew.kickoff()

Key Characteristics

Property Value
Language Python
License MIT
Hosted option CrewAI Enterprise
Provider CrewAI Inc.
Website crewai.com
GitHub crewAIInc/crewAI

Further Reading