workerd
Ranked 5 of 9 JavaScript runtimes by recommenders
Open-source JavaScript runtime from Cloudflare that runs Workers code locally, with strong sandboxing and a wrangler-free mode. Caveat: still beta, and Durable Objects don't work across multiple machines.
Open-source JavaScript runtime from Cloudflare that runs Workers code locally, with strong sandboxing and a wrangler-free mode. Caveat: still beta, and Durable Objects don't work across multiple machines.
20 people gave an opinion
- recommend it
- 13
- criticize it
- 7
- approval share
- 65%
Recommended in 10 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: not recommended
- June 2026: recommended
- July 2026: not recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 13 people recommend itNeeds 10 or more, met.
- 1.8 recommenders for every criticNeeds 2 to 1 or better, not met.
- Recommended in 10 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Strong sandboxing and permissions
“workerd as-is actually does provide strong sandboxing, at least as strong as (arguably stronger than) any other JS runtime”
Comment from 21 Nov 2025 in “Head in the Zed Cloud” “runtime supports sandboxing and permissions like deno or workerd”
Comment from 1 Feb 2026 in “What I learned building an opinionated and minimal coding agent” “workerd has some pretty aggressive sandboxing too”
Comment from 10 Oct 2026 in “Cloudflare acquires Deno” Local development, testing and CI
“developing and testing user-facing apps with Miniflare, workerd, D1, and wrangler has been a breeze”
Comment from 24 Jan 2026 in “Tell HN: Cloudflare's D1 service degraded since 2 days” “wrangler / workerd enables local CI”
Comment from 10 Sep 2026 in “Open Source Durable Objects for Postgres” Open source, trusted Cloudflare runtime
“Workerd is already open source so that's a good start.”
Comment from 10 Nov 2025 in “Head in the Zed Cloud” “I trust workerd in the context of Cloudflare”
Comment from 4 Jan 2026 in “JavaScript engines zoo – Compare every JavaScript engine”
What people warn about
Each mark is one comment
Beta, not production-ready
“There is a big "WARNING: This is a beta. Work in progress" message in https://github.com/cloudflare/workerd”
Comment from 4 Jan 2026 in “OpenWorkers: Self-Hosted Cloudflare Workers in Rust” “workerd is really far from production-ready Workers replacement”
Comment from 11 Oct 2026 in “Cloudflare acquires Deno” Depends on Cloudflare-only services
“push on semantics that can only be run on Cloudflare infrastructure”
Comment from 9 Oct 2026 in “Cloudflare acquires Deno” “you can't run D1 (Sqlite alternative), you can't run KV or Queues”
Comment from 9 Oct 2026 in “Cloudflare acquires Deno”
Other JavaScript runtimes people recommend
The four most recommended other JavaScript runtimes, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Bun | 493 | 608 | 45% | 12 | 2 yrs17 owners | — |
| Node.js | 257 | 241 | 52% | 12 | 10 yrs5 owners | — |
| Deno | 234 | 176 | 57% | 12 | 2 yrs13 owners | — |
| Ant JavaScript runtime | 16 | 17 | 48% | 2 | — | — |
| workerdThis page | 13 | 7 | 65% | 10 | — | — |
What people said
27 of the 35 comments that mention it, newest first. Each links to the original comment.
“workerd is really far from production-ready Workers replacement”
“workerd has some pretty aggressive sandboxing too”
“you can't run D1 (Sqlite alternative), you can't run KV or Queues”
“push on semantics that can only be run on Cloudflare infrastructure”
“Kind of hard to figure out what sandboxing controls are available given the lack of docs.”
“it seems like they will be explicitly working on making workerd an open source self hostable runtime”
“but I guess workerd addressed that.”
“wrangler / workerd enables local CI”
“workerd stand-alone is designed to work well at small-medium scale.”
“workerd can be used directly without wrangler, and is production-capable in that format.”
“Durable Objects don't scale out well without the global scheduling”
“The biggest catch is that workerd's implementation of Durable Objects currently doesn't work across multiple machines”
“My go-to solution is to make ad-hoc proxies with workerd that work just the way i need”
“Kenton and others fought hard to make the abstractions among the cleanest and well designed in the industry”
“even there, with limitations”
“no new language needed just a new runtime”
“WARNING: workerd is not a hardened sandbox”
“runtime supports sandboxing and permissions like deno or workerd”
“developing and testing user-facing apps with Miniflare, workerd, D1, and wrangler has been a breeze”
“why not just give the people workerd?”
“I trust workerd in the context of Cloudflare”
“workerd is the only one I know of where this is the core intended use case”
“workers + DO alone is enough to do a whole lot of things...”
“There is a big "WARNING: This is a beta. Work in progress" message in https://github.com/cloudflare/workerd”
“workerd is actually better for that”
“workerd as-is actually does provide strong sandboxing, at least as strong as (arguably stronger than) any other JS runtime”
“Workerd is already open source so that's a good start.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.