OpenWorkers – Self-hosted Cloudflare workers in Rust
I've been working on this for some time now, starting with vm2, then deno-core for 2 years, and recently rewrote it on rusty_v8 with Claude's help. OpenWorkers lets you run untrusted JS in V8 isolates on your own infrastructure. Same DX as Cloudflare Workers, no vendor lock-in. What works today: fetch, KV, Postgres bindings, S3/R2, cron scheduling, crypto.subtle. Self-hosting is a single docker-compose file + Postgres. Would love feedback on the architecture and what feature you'd want next.
In plain words
OpenWorkers is a self-hosted platform for running untrusted JavaScript in V8 isolates on your own infrastructure, built in Rust. It mirrors Cloudflare Workers' developer experience while eliminating vendor lock-in. The tool supports fetch requests, key-value storage, Postgres bindings, S3/R2 integration, cron scheduling, and Web Crypto APIs. Designed for developers who want serverless-style functions without cloud dependencies, it deploys via a single Docker Compose configuration with Postgres.
written from the facts on this page · September 2026
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