AI agent orchestration frameworks: the six worth your time, and how to choose one
The six open-source agent orchestration frameworks worth evaluating in 2026 are LangGraph, the OpenAI Agents SDK, CrewAI, AutoGen, smolagents and Google ADK. Choose LangGraph for stateful workflows that branch, retry and pause for human review; the OpenAI Agents SDK for the fastest path to a working loop inside one provider; CrewAI for role-based multi-agent prototypes; smolagents to learn the pattern before committing. All six are free and open source.
Free. 6 repositories, no payment. One email address opens the list.
Every framework on this page solves the same small problem. Call a model, read what it wants, run the tool, feed the result back, repeat. That loop is about forty lines. You could write it this afternoon.
What you're actually choosing between is opinions: how state is stored, what happens when step four throws, whether a human can interrupt, and how much of your code you rewrite when you switch models.
The first question I'd ask isn't which framework. It's whether your agent has to survive a restart. If a user can close the app mid-task and expect to come back to it, you need durable state, and that narrows the field to roughly LangGraph plus a fair amount of custom work. If every run is one request and one response, almost anything here is fine, and you should optimise for how fast your team can read the code instead.
The second question is what language your product is already written in. Most of this ecosystem is Python, and a lot of teams end up standing up a second service purely to host the agent: its own container, its own secrets, its own on-call rota. That cost is real and it never appears in the comparison tables. If you're a TypeScript shop, read the TypeScript page before you accept it.
One honest warning on AutoGen. The ideas out of Microsoft Research are strong and the codebase has been substantially rewritten more than once. That's normal for a research-led project and a genuine risk for a production roadmap. Read the migration history before you commit a quarter to it.
This week: write down whether your agent must survive a restart, and what language your product is in. Those two answers pick the framework for you in about five minutes.
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Orchestration: where the agent actually lives
Pick one. Picking two is how projects die. These are the four we have shipped against, and the honest reason you would choose each.
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The free list above is the short version, and every repository on it is in here too. The Gods Repo Library is the whole catalogue: 100 repositories across 12 categories, each with a written note on what it is for and when to reach for it, and it carries the AI optimisation half, inference, serving, quantisation and evaluation, that the free list barely touches. Every figure in it is read from the GitHub API rather than typed by hand, and nothing archived or idle survives the build. Verified 2026-09-23.
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