Ant: A New JavaScript Runtime With Its Own Engine, Package Registry, and Desktop Framework

Last updated: July 12, 2026

Official Sources#

The JavaScript runtime wars just got a new contender. Ant is a lightweight JavaScript runtime with its own engine, package manager, package registry (ants.land), and a desktop app framework. The kicker? It's built by a single developer.

The Show HN post describes Ant as "a JavaScript ecosystem built around a runtime with its own JavaScript engine" - not a V8 wrapper like Node, Deno, or Bun, but a ground-up implementation.

What Makes Ant Different#

In a runtime landscape dominated by V8 (Chrome's engine powering Node and Deno) and JavaScriptCore (Safari's engine powering Bun), Ant takes the audacious path of building its own JavaScript engine. The result is a remarkably small footprint.

Size matters:

• V8: Hundreds of megabytes
• Ant: ~8MB including the entire runtime and Node compatibility layer

As the author explained in the HN thread: "its ~8mb including the entire runtime and node-compat work. pretty simple to embed anywhere as well."

The ecosystem:

• Ant runtime - The core JavaScript execution environment
• apm - Package manager compatible with npm protocols
• ants.land - A dedicated package registry
• Ant Desktop - An Electron alternative for building native desktop apps (just released a stable version)

What HN Is Saying#

The discussion revealed both excitement and skepticism, typical for any project this ambitious.

The embedding use case:

"Holy crap, V8 is that big now? Very interested in this for embedding purposes."

For developers who need to embed JavaScript in other applications - games, desktop apps, IoT devices - the size difference is significant. Shipping V8 means shipping hundreds of megabytes of runtime. Shipping Ant means 8MB.

Performance questions:

One commenter pointed to zoo.js benchmarks showing Ant lagging behind V8 significantly. The author acknowledged this but noted:

"many [improvements], the engine has basically gone through a full rewrite since feb, that was still mostly interpt and missing many jit ops. nightly will include benchmarks soon as well"

The "near-V8 speeds" claim from the project page appears aspirational rather than current reality, but the trajectory is toward closing that gap.

The sandboxing angle:

"The thing that caught my eye immediately was the sandboxing. I have no idea why Node and npm don't have sandboxing by default. It would greatly help with some of these worms and supply chain attacks."

Ant apparently includes sandboxing features that Node lacks out of the box - relevant given the ongoing npm supply chain security concerns.

Registry skepticism:

Several commenters questioned the need for yet another package registry:

"Could you use the JSR package registry instead of setting up a new one?"

Another suggested the economics don't make sense: "Implementing, running, maintaining, scaling a module registry is probably not worth the time. Unless there's a clear technical requirement from the runtime."

The origin story:

An interesting thread surfaced about the project's history. Someone linked to a GitHub issue from March suggesting early versions may have been derived from Elk, an AGPL-licensed embedded JavaScript engine. The author acknowledged the history but noted the current codebase is a complete rewrite:

"this was flagging code from all the way back in dec of 2025, back when this project was just some idea... around feb thats when basically deleted the existing codebase and designed a much more reliable system from the ground up"

The name collision:

Multiple commenters pointed out Ant shares its name with Apache Ant (the Java build tool) and Anthropic's CLI tool:

"i was just joking about Anthropic's ant CLI not caring about Apache ant, and now we're talking about Javascript ant!"

The 2026 Runtime Landscape#

To understand where Ant fits, here's the current state of JavaScript runtimes:

Bun proved there's room for new entrants when it was acquired by Anthropic to power Claude Code, leveraging its sub-10ms cold starts.

Ant's bet is different: sacrifice some performance for radical embeddability. If you're building a desktop app, game, or IoT device where you need JavaScript scripting, 8MB is a lot more palatable than hundreds of megabytes.

Should You Use It?#

Consider Ant if:

• You need to embed JavaScript in another application
• Binary size is a hard constraint
• You're building lightweight desktop apps (Ant Desktop)
• You want to experiment with a non-V8/JSC JavaScript engine

Wait and see if:

• You need production-grade performance
• You depend heavily on npm ecosystem compatibility
• You need stability guarantees

The author is refreshingly honest about the project's state: "It's still early, and I'd appreciate any feedback on the overall direction."

The Solo Developer Question#

Building a JavaScript engine is typically a multi-year, multi-team effort. V8 has hundreds of contributors. JavaScriptCore has decades of Safari development behind it.

Ant's author documented the journey in blog posts: building the first version in a month and the follow-up rewrite. As one HN commenter observed:

"I'm not sure what the economics of building a new runtime and ecosystem from scratch are but it seems we're already in a phase where individual developers are creating software which previously took a whole team. And its only getting started..."

Whether Ant becomes a serious contender or remains a niche tool for embedding use cases, it's a fascinating example of what's possible when one developer decides to build from scratch instead of wrapping V8.

FAQ#

What is Ant?#

Ant is a lightweight JavaScript runtime built by a single developer. It ships its own JavaScript engine rather than wrapping V8 or JavaScriptCore, plus a package manager (apm), a package registry (ants.land) and a desktop app framework (Ant Desktop).

How big is Ant compared with V8?#

The author says Ant is about 8MB including the entire runtime and the Node compatibility layer, compared with hundreds of megabytes for V8. That small footprint is the main reason it appeals for embedding JavaScript in games, desktop apps and IoT devices.

Is Ant as fast as V8?#

Not yet. Benchmarks on zoo.js show Ant lagging behind V8 significantly. The author says the engine has gone through a full rewrite since February and that nightly builds will include benchmarks soon, so the near-V8 speed claim reads as aspirational for now.

Should I use Ant in production?#

Consider it if you need to embed JavaScript, have a hard binary size constraint or want to experiment with a non-V8 engine. Wait if you need production-grade performance, heavy npm compatibility or stability guarantees. The author describes the project as still early.

Continue Reading#

• Adam (YC W25): Open Source AI CAD That Generates OpenSCAD from Text
• Your AI Session Is No Longer Yours: How Providers Seal Reasoning, Search, and Subagent State
• Box3D: Erin Catto Releases an Open Source 3D Physics Engine

Sources#

• Ant Homepage - Official project site
• HN Discussion - 45+ comments with author Q&A
• Ant GitHub - Source code
• ants.land - Package registry
• Ant Desktop on npm - Desktop framework
• Zoo.js Benchmarks - JavaScript runtime comparison
• Building a JS Runtime in One Month - Author's development blog
• 2026 Runtime Comparison - Node vs Bun vs Deno analysis