Nobody can tell you which AI agent framework to use without knowing five things about you. Anyone who tries is guessing. So think of this as the which AI agent framework should I use decision guide I wish someone had handed me: five questions, because the answers do the choosing.
One: what language does your team think in? Python teams belong with the Python frameworks, TypeScript teams with the TypeScript ones. Fighting your team's language for a framework is a strange use of energy. Two: how much control do you need? If you need to see and steer every step, you want the graph-and-state style, and LangGraph is the flagship. If you want to move fast, the role-based team style like CrewAI gets you there sooner. Be honest here. People routinely overestimate how much control they want and underestimate how much work it costs.
Three: who maintains this in a year? An unmaintained framework is a future rewrite, so check the maintenance pulse before you fall in love: recent commits, answered issues, releases this year. Four: where do the models run? If you need local models for privacy or cost, only shortlist frameworks with a pluggable model layer. I keep repeating the pluggable model layer thing across these articles. It is that important.
Five: how will you watch it run? Observability is a feature. Check for run traces and structured logs before you commit, not after your first 2 AM incident. Answer all five and the field of 548 collapses to a shortlist you can defend. Then build the same toy project in your top two, because the right choice usually becomes obvious within a weekend. Questions first, data throughout, feelings last.
Our AI agent framework comparison at localaiagents.fyi runs all 548 frameworks through activity, license, and capability signals, which is the data half of the method, and it is how the best open source AI agent frameworks separate from the pack. Prefer to outsource the choosing? Framework selection consulting SaaS offerings do this filtering for you. Or skip to working software: I build custom AI agents scoped to your actual workflow at localaiagents.fyi.