Don't Anthropic and OpenAI both offer the same thing built in? What are the difference with this service?

their product attempts to duplicate your local dev setup on a machine on the cloud, which means they copy your .env / local postgres db, local docker-compose stack etc. It worked quite well for me, I tried it just now (except for postgres + setting up git). I think the product is quite good but still needs a bit of polishing.

I'm a bit frustrated that they restrained EU users from downloading their app, but I guess they just want to avoid dealing with GDPR, which is fair for an early startup!

Oof, I don't think we paid super close attention to the country list when shipping our app. We'll fix this for you, but it might be a few days for things to make it out of review. Really appreciate you trying it out. It's still pretty early so things are still rough around the edges, but we'll be keeping an eye out on our logs for bugs, and feel free to reach out to feedback at boxes.dev if you notice any issues.