# pydantic-ai vs ruflo
_Agent Frameworks · independent comparison_

> pydantic-ai and ruflo are both open-source agent frameworks you can self-host for free. ruflo has wider GitHub adoption — 68k stars vs 19k. Neither is universally better — pick by fit.

## Side by side

**pydantic-ai**
- Open source · Framework · 19k★ · Python · MIT · active 2 days ago
- Best for: Python teams that want type-safe agent development with the Pydantic philosophy.
- Avoid if: You are not working in Python.
- [listing](https://agentsearchengine.app/agents/pydantic-ai) · [official](https://pydantic.dev/pydantic-ai)

**ruflo**
- Open source · Framework · 68k★ · TypeScript · MIT · active 3 days ago
- Best for: Adding tools, memory, loops, and sandboxes on top of Claude Code or Codex.
- Avoid if: You do not already use Claude Code or Codex — Ruflo is a harness layered on them.
- [listing](https://agentsearchengine.app/agents/ruflo) · [official](https://Cognitum.One)

## Key differences

- ruflo has wider GitHub adoption — 68k stars vs 19k.
- pydantic-ai is written primarily in Python; ruflo in TypeScript.

## Which to choose

**Choose pydantic-ai if:** Python teams that want type-safe agent development with the Pydantic philosophy.

**Choose ruflo if:** Adding tools, memory, loops, and sandboxes on top of Claude Code or Codex.

## FAQ

**What's the main difference between pydantic-ai and ruflo?**
ruflo has wider GitHub adoption — 68k stars vs 19k.

**Is pydantic-ai or ruflo better?**
Neither is universally better. pydantic-ai is the stronger fit for Python teams that want type-safe agent development with the Pydantic philosophy; ruflo for Adding tools, memory, loops, and sandboxes on top of Claude Code or Codex. Use the side-by-side specs to decide by your own constraints.

**Is pydantic-ai or ruflo free?**
pydantic-ai is free to run and self-host; ruflo is free to run and self-host. Both are free to self-host — you only pay for the infrastructure and any model or API usage.

**Which is more popular, pydantic-ai or ruflo?**
By GitHub stars — a proxy for open-source adoption — ruflo is ahead (68k vs 19k). Stars measure attention, not necessarily the better fit for you.

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Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/compare/pydantic-ai-vs-ruflo