Vercel Sandbox is a clean way to run untrusted code. A Firecracker microVM per sandbox, a Python and a JS SDK, snapshots that persist between runs, and if you already deploy on Vercel it drops straight in. It's a good product.
There's one line in the docs that decides it for a lot of EU teams, and it's easy to skim past: "Currently, Vercel Sandbox is only available in the iad1 region." That's US East, Northern Virginia. Every sandbox you create, every file your agent writes, every snapshot it saves - all of it runs there. There is no EU region to pick.
If you're an EU company shopping for a Vercel Sandbox alternative because of exactly that, this post is the comparison. Where the two line up, where they genuinely differ, and the honest places Vercel wins.
The short verdict
Pick Vercel Sandbox if you already live on Vercel, you want high self-serve concurrency out of the box, and US-region execution is fine for you. Pick orkestr if you're an EU company that needs the agent's code, files, and snapshots to physically stay in Europe - on every plan, by default, without a region you have to go ask for.
