# bifrost vs osaurus
_Agent Infrastructure · independent comparison_

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

## Side by side

**bifrost**
- Open source · Infrastructure · 7.5k★ · Go · Apache-2.0 · active 7 days ago
- [listing](https://agentsearchengine.app/agents/bifrost) · [official](https://www.getmaxim.ai/bifrost)

**osaurus**
- Open source · Infrastructure · 7.7k★ · Swift · MIT · active 7 days ago
- [listing](https://agentsearchengine.app/agents/osaurus) · [official](https://osaurus.ai)

## Key differences

- bifrost is written primarily in Go; osaurus in Swift.
- Licensing differs: bifrost is Apache-2.0, osaurus is MIT.

## Which to choose

**Choose bifrost if:** your team works primarily in Go.

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

## FAQ

**What's the main difference between bifrost and osaurus?**
bifrost is written primarily in Go; osaurus in Swift.

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

**Is bifrost or osaurus free?**
bifrost is free to run and self-host; osaurus 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, bifrost or osaurus?**
By GitHub stars — a proxy for open-source adoption — osaurus is ahead (7.7k vs 7.5k). 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/bifrost-vs-osaurus