# Juno

> Juno is an open-source serverless platform to build, deploy, and run apps in WASM containers with complete ownership and zero DevOps.

Juno is an open-source serverless platform to build, deploy, and run apps in WASM containers with complete ownership and zero DevOps.

## Facts
- Website: https://juno.build
- Categories: Developer Tools, Open Source
- LotsDirectory page: https://lots.directory/products/juno
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is Juno?

Juno is an open-source SDK and full-stack platform for apps in WASM containers. The site says Juno is in maintenance and not actively developed anymore.

## What Juno does

The stack includes hosting for static sites, SPA, and SSG, authentication with Google, GitHub, Passkeys, and Internet Identity, a key-value datastore, file storage, serverless functions in Rust or TypeScript, and privacy-friendly analytics. A frontend can use React, SvelteKit, or Next.js. The app is bundled into one WebAssembly container. A CLI or the Console UI can manage projects. Deploys can use GitHub Actions. The emulator is for work locally.

## Who Juno is for

Juno is for web developers building and hosting apps. The page says not to use it for anything serious, unless the need is only a static website.

## How Juno works

Scaffold with npm create juno@latest, or add skills with npx skills add junobuild/skills. Build the frontend, add a Rust or TypeScript function if needed, and test in the emulator. Deploy with a Satellite when the app should go live. The container holds data, logic, and storage. Juno has zero access to the code, data, or infrastructure. There is no cold start.

## Key features

- Open-source SDK for apps in WASM containers, with no DevOps.
- Hosting, authentication, key-value datastore, storage, functions, and analytics.
- Google, GitHub, Passkeys, and Internet Identity.
- Serverless functions in Rust or TypeScript.
- React, SvelteKit, or Next.js on the frontend.
- Emulator for work locally, then a Satellite deploy.
- CLI or Console UI, with GitHub Actions for deploys.
- The site says maintenance, and not actively developed anymore.

## Facts from juno.build, checked 14 October 2026

- The page says zero DevOps and no cold start.
- npx skills add junobuild/skills is for AI agent skills.
- Monitoring and Snapshots are listed with the other products.
- The page says the emulator mirrors production.

Written from Juno's own website ([Homepage](https://juno.build/), [Docs](https://juno.build/docs/intro)). The maker can claim this listing to edit it.

## FAQ

### Is Juno still actively developed?
No. The page says Juno is in maintenance and not actively developed anymore. It also says not to use it for anything serious.

### What is in the stack?
Hosting for static sites, SPA, and SSG. Authentication with Google, GitHub, Passkeys, and Internet Identity. A key-value datastore, file storage, serverless functions in Rust or TypeScript, and privacy-friendly analytics.

### How does a project start and deploy?
npm create juno@latest can scaffold a project. The emulator is for a build and test locally. A Satellite deploy takes the project to its own container. GitHub Actions can handle deploys and upgrades.

### Who controls the running app?
The page says Juno has zero access to the code, data, or infrastructure. The container holds data, logic, and storage. There is no cold start.

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Source: https://lots.directory/products/juno · Machine-readable context by LotsDirectory.