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Osmium Coder vs Windsurf
Windsurf and Osmium are both agent-first editors that write to your files rather than handing you snippets. The dividing line is the same as with Cursor: Windsurf needs its service to think, and Osmium can think on your GPU.
Side by side
| Dimension | Osmium Coder | Windsurf |
|---|---|---|
| Runs without their cloud | Yes — the full IDE and agent run on a local model | No — the product requires their service |
| Free tier | The whole IDE, unmetered, on your own hardware | Limited free usage, then a subscription |
| Where edits land | Your working tree, as diffs you keep or discard | Varies — editor buffer, or a hosted branch |
| API keys | None — no paste field anywhere in the product | Usually managed for you, or BYO key |
| Works offline | Yes, once a local model is pulled | No |
| Code leaving the machine | Nothing leaves when the model is local | Prompts and context go to their service |
Where Windsurf is better
- A polished agentic flow with a lot of iteration behind it.
- Frontier model quality by default, without you choosing or sizing a model.
- A bigger community and more third-party material to learn from.
Choose Osmium when
- You want a free path that does not expire or throttle.
- You want to choose the exact open model you run, and know its VRAM cost up front.
- You need offline or air-gapped operation.