Deno's celld runs Cloudflare Workers on your own hardware

Celld: Self-hosted, distributed Durable Objects

celld is an open-source daemon that runs Cloudflare Workers and Durable Objects on your own machines. Each object is its own SQLite database, addressed by name and replicated to an S3-compatible bucket you own; nodes coordinate through that bucket alone, with no control plane or consensus. Because every object is its own small database, applications shard by construction — the contention and blast-radius failures of one shared database are designed out, not managed. Idle cells hibernate to nearly nothing.