The Python versus TypeScript question in agent frameworks is not really a language question. It is a culture question, and knowing which culture you belong to answers half of it before you start.
Python is the research culture. Notebooks, experiments, the ML ecosystem, and the vast majority of frameworks: over 250 in our database. If your team thinks in Python, or your agent needs to touch ML tooling, this is home. The examples assume Python, the answers assume Python. Fighting that gravity is a strange use of energy, and I have watched teams try. It rarely ends well.
TypeScript is the product culture. Web developers, full-stack teams, people shipping user-facing apps where the agent is a feature, not the product. The TypeScript frameworks are fewer but often more product-shaped: better defaults for web integration, cleaner paths to deployment. If you search TypeScript AI agent frameworks you will hit the Mastra vs Vercel AI SDK debate within minutes, and honestly it is a good debate. Both are serious tools with real tradeoffs.
Neither culture is better. They are better for different teams, and here is the part people skip: a Python ML team adopting a TypeScript framework for ideological reasons will be miserable. A web team adopting a Python framework because it topped a ranking will be equally miserable. Match the ecosystem to the team, then pick the best framework inside it. I have seen this rule violated in both directions. It never works.
Within each language, run the same filters: maintenance pulse, real contributors, sane license, pluggable model layer. Language narrows the field. Data picks the winner. And if neither culture feels like home, a custom AI agent platform SaaS can abstract the whole question away, though you should understand what you are giving up before you pay someone else to hold the complexity. Our AI agent framework comparison table splits all 548 frameworks by language with activity and license signals. Browse your half at localaiagents.fyi. Or skip the ecosystem debate: I build custom AI agents scoped to your actual workflow at localaiagents.fyi.