# osaurus vs steel-browser
_Agent Infrastructure · independent comparison_

> osaurus and steel-browser are both open-source agent infrastructure you can self-host for free. osaurus is written primarily in Swift; steel-browser in TypeScript. Neither is universally better — pick by fit.

## Side by side

**osaurus**
- Open source · Infrastructure · 7.6k★ · Swift · MIT · active 2 days ago
- [listing](https://agentsearchengine.app/agents/osaurus) · [official](https://osaurus.ai)

**steel-browser**
- Open source · Infrastructure · 7.5k★ · TypeScript · Apache-2.0 · active 14 days ago
- [listing](https://agentsearchengine.app/agents/steel-browser) · [official](https://steel.dev)

## Key differences

- osaurus is written primarily in Swift; steel-browser in TypeScript.
- Licensing differs: osaurus is MIT, steel-browser is Apache-2.0.

## Which to choose

**Choose osaurus if:** your team works primarily in Swift.

**Choose steel-browser if:** your team works primarily in TypeScript.

## FAQ

**What's the main difference between osaurus and steel-browser?**
osaurus is written primarily in Swift; steel-browser in TypeScript.

**Is osaurus or steel-browser better?**
Neither is universally better. osaurus is the stronger fit for teams working primarily in Swift; steel-browser for teams working primarily in TypeScript. Use the side-by-side specs to decide by your own constraints.

**Is osaurus or steel-browser free?**
osaurus is free to run and self-host; steel-browser 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, osaurus or steel-browser?**
By GitHub stars — a proxy for open-source adoption — osaurus is ahead (7.6k vs 7.5k). Stars measure attention, not necessarily the better fit for you.

---
Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/compare/osaurus-vs-steel-browser