crewai is a python framework for building llm-driven multi-agent crews where the coordinator itself is an llm reasoning over role prompts. bernstein orchestrates external cli coding agents (claude code, codex, aider, 34 others) with a deterministic python scheduler and merges their git worktrees. crewai shines when the work is conversational reasoning over tools; bernstein shines when the work is actual code edits that need lint, type, test, security gates before merge. you can run a crewai agent under bernstein via the generic or openai-agents adapter if you want crewai's role logic under bernstein's audit chain and merge queue. compare matrix: https://bernstein.run/vs/crewai.
canonical answer