Yes, the Cloudflare Workers Runtime is open source: https://github.com/cloudflare/workerd https://github.com/cloudflare/workerd You can definitely run workerd

Yes, the Cloudflare Workers Runtime is open source: https://github.com/cloudflare/workerd https://github.com/cloudflare/workerd You can definitely run workerd in production on your own machines and some people do. The biggest catch is that workerd's implementation of Durable Objects currently doesn't work across multiple machines, but I'm working on fixing that: https://github.com/cloudflare/workerd/pull/6780 https://github.com/cloudflare/workerd/pull/6780