You mostly use standard Web APIs inside Workers, so that's portable, but the entire runtime (including Durable Objects, KV, R2 and D2) is open-source and can be

You mostly use standard Web APIs inside Workers, so that's portable, but the entire runtime (including Durable Objects, KV, R2 and D2) is open-source and can be self-hosted. https://blog.cloudflare.com/workerd-open-source-workers-runtime/ https://blog.cloudflare.com/workerd-open-source-workers-runt...