What will you ship?

Describe an idea. Kaer turns it into a working app, preview, or fix — without the babysitting.

Speaks every language your stack does

React

TypeScript

Python

Rust

Node.js

Swift

Ruby

Postgres

GraphQL

React

TypeScript

Python

Rust

Node.js

Swift

Ruby

Postgres

GraphQL

The page demos itself

It runs while you read.

Every card on this page is a real, running slice of the operator. Watch them work — then click one to try it yourself.

01 · Task graph

It thinks in parallel.

One prompt fans into a tree of subtasks. The agent runs them on isolated microVMs and stitches the result.

One promptplan the change

schemadone

interfacerunning

testsqueued

One PRstitched & ready

02 · Code review

It reads your code.

Patch by anchor, not by rewrite. Unified diffs you can actually review.

            import { stripe } from '@/lib/stripe'import { loadCart } from '@/lib/cart'export async function checkout(req, res) {  const cart = await loadCart(req.userId);  // FIX: race when user has 2 tabs open  if (!cart.items.length) return res.status(400);  const key = cart.id + ':' + cart.version;  return stripe.createSession({ cart, idempotencyKey: key });}  // idempotencyKey blocks the double-charge ✓  // 400 now guards the empty cart ✓import { stripe } from '@/lib/stripe'import { loadCart } from '@/lib/cart'export async function checkout(req, res) {  const cart = await loadCart(req.userId);  // FIX: race when user has 2 tabs open  if (!cart.items.length) return res.status(400);  const key = cart.id + ':' + cart.version;  return stripe.createSession({ cart, idempotencyKey: key });}  // idempotencyKey blocks the double-charge ✓  // 400 now guards the empty cart ✓
          

03 · Handoff

It follows you.

Laptop, phone, tablet — the session, cursor, and full context travel with you.

kaer

Build
faster

prompt → PR

Start

kaer

Ship in parallel

One prompt fans into subtasks — stitched into a single PR.

Try the operator

kaer

Preview live

every branch, instantly

Open

you aria devon maria

04 · Pipeline

It ships.

Preview links per branch, rollbacks in seconds, approvals between meetings.

buildpassed

review6 of 6

stagingv1.0.42

canaryrolling

prodqueued

reviewing done

Meet Operator

An engineer that doesn't sleep.

Operator v1 is the autonomous agent at the heart of Kaer. It plans, branches, edits, runs, and ships — in parallel, in isolation, on every device you touch.

Plans, then fans out into a tree of parallel subtasks
Patches by anchor — never silently rewrites the wrong file
Runs each subtask in its own isolated microVM
Streams every step; you can pause, redirect, or take the cursor at any point

human Add Stripe checkout to the pricing page.

planSurvey the repo for the existing checkout flow.
spawnBranch into 4 parallel ops: schema, UI, billing, tests.
editPatch src/checkout/handler.ts:142
verifySpin an isolated VM, run the new e2e suite.
shipPR opened, preview link in #engineering.

elapsed00:00:42

tokens12,481

cost$0.04

Voice agent

Talk to Kaer. Keep moving.

Say what you want out loud and keep working. Kaer plans the change, writes the code, and runs the checks — and can even drive your computer while you're away — pausing for your approval before anything risky.

Listening Say what you want out loud.

WakeOn-device hotword. Nothing leaves your machine.
PlanMaps the change across your repo.
ParallelFans work out across microVMs.
ConfirmPauses for one-tap approval + full diff.
ShipPR opened, preview link posted.

One request, start to finish

Not screenshots. Live previews.

A single voice session — “add a dark mode toggle” — captured as it moves through every stage: listening, planning, working in parallel, pausing to confirm, then shipping. Nothing here is a mockup.

Listening Hotword activated 01 / 05

You“Hey Kaer, add a dark mode toggle to the settings page.”

On-device wake detection — zero cloud audio until you speak.

Planning Reading the codebase 02 / 05

Kaer“On it. Checking the settings structure and theme provider, then I’ll fan the work out.”

Breaks intent into a parallel plan across the files it needs to touch.

Working Parallel · 4 microVMs 03 / 05

Confirm Awaiting approval 04 / 05

Risky steps pause for a one-tap approval, full diff first.

Shipped Tests passing 05 / 05

pr-447.kaer.dev PR opened in #engineering

Preview ready, full context kept for the next ask.

Pricing

Start small. Scale fast.

Designed for every stage — from "just trying it" to "running the company on it."

Starter

For exploring what's possible.

Free

Free daily Operator credits
Free credits for AI integrations
Publish 1 app
Limited Operator intelligence
Community support only

Kaer Core

For personal projects & simple apps.

$ 2218 per month
billed monthlybilled yearly

Join Core

$20 of monthly credits
Includes up to 5 collaborators
Unlimited workspaces
Autonomous long builds
Remove "Made with Kaer"

Kaer Pro

For commercial & professional builds.

$ 11290 per month
billed monthlybilled yearly

Join Pro

Everything in Core
$100 monthly credits
Includes up to 15 collaborators
Includes up to 50 viewers
Priority compute pool

Enterprise

For enterprise-grade security & controls.

Custom

Everything in Pro
Custom seat limits
SSO / SAML
Advanced privacy controls
Design system support

Ready when you are.

No credit card. No queue. Just a prompt — and an agent that actually does something with it.

Start free See pricing

Loading…

What will you ship?

Describe an idea. Kaer turns it into a working app, preview, or fix — without the babysitting.

Speaks every language your stack does

React

TypeScript

Python

Rust

Node.js

Swift

Ruby

Postgres

GraphQL

React

TypeScript

Python

Rust

Node.js

Swift

Ruby

Postgres

GraphQL

The page demos itself

It runs while you read.

Every card on this page is a real, running slice of the operator. Watch them work — then click one to try it yourself.

01 · Task graph

It thinks in parallel.

One prompt fans into a tree of subtasks. The agent runs them on isolated microVMs and stitches the result.

One promptplan the change

schemadone

interfacerunning

testsqueued

One PRstitched & ready

02 · Code review

It reads your code.

Patch by anchor, not by rewrite. Unified diffs you can actually review.

            import { stripe } from '@/lib/stripe'import { loadCart } from '@/lib/cart'export async function checkout(req, res) {  const cart = await loadCart(req.userId);  // FIX: race when user has 2 tabs open  if (!cart.items.length) return res.status(400);  const key = cart.id + ':' + cart.version;  return stripe.createSession({ cart, idempotencyKey: key });}  // idempotencyKey blocks the double-charge ✓  // 400 now guards the empty cart ✓import { stripe } from '@/lib/stripe'import { loadCart } from '@/lib/cart'export async function checkout(req, res) {  const cart = await loadCart(req.userId);  // FIX: race when user has 2 tabs open  if (!cart.items.length) return res.status(400);  const key = cart.id + ':' + cart.version;  return stripe.createSession({ cart, idempotencyKey: key });}  // idempotencyKey blocks the double-charge ✓  // 400 now guards the empty cart ✓
          

03 · Handoff

It follows you.

Laptop, phone, tablet — the session, cursor, and full context travel with you.

kaer

Build
faster

prompt → PR

Start

kaer

Ship in parallel

One prompt fans into subtasks — stitched into a single PR.

Try the operator

kaer

Preview live

every branch, instantly

Open

you aria devon maria

04 · Pipeline

It ships.

Preview links per branch, rollbacks in seconds, approvals between meetings.

buildpassed

review6 of 6

stagingv1.0.42

canaryrolling

prodqueued

reviewing done

Meet Operator

An engineer that doesn't sleep.

Operator v1 is the autonomous agent at the heart of Kaer. It plans, branches, edits, runs, and ships — in parallel, in isolation, on every device you touch.

Plans, then fans out into a tree of parallel subtasks
Patches by anchor — never silently rewrites the wrong file
Runs each subtask in its own isolated microVM
Streams every step; you can pause, redirect, or take the cursor at any point

human Add Stripe checkout to the pricing page.

planSurvey the repo for the existing checkout flow.
spawnBranch into 4 parallel ops: schema, UI, billing, tests.
editPatch src/checkout/handler.ts:142
verifySpin an isolated VM, run the new e2e suite.
shipPR opened, preview link in #engineering.

elapsed00:00:42

tokens12,481

cost$0.04

Voice agent

Talk to Kaer. Keep moving.

Listening Say what you want out loud.

WakeOn-device hotword. Nothing leaves your machine.
PlanMaps the change across your repo.
ParallelFans work out across microVMs.
ConfirmPauses for one-tap approval + full diff.
ShipPR opened, preview link posted.

One request, start to finish

Not screenshots. Live previews.

Listening Hotword activated 01 / 05

You“Hey Kaer, add a dark mode toggle to the settings page.”

On-device wake detection — zero cloud audio until you speak.

Planning Reading the codebase 02 / 05

Kaer“On it. Checking the settings structure and theme provider, then I’ll fan the work out.”

Breaks intent into a parallel plan across the files it needs to touch.

Working Parallel · 4 microVMs 03 / 05

Confirm Awaiting approval 04 / 05

Risky steps pause for a one-tap approval, full diff first.

Shipped Tests passing 05 / 05

pr-447.kaer.dev PR opened in #engineering

Preview ready, full context kept for the next ask.

Pricing

Start small. Scale fast.

Designed for every stage — from "just trying it" to "running the company on it."

Starter

For exploring what's possible.

Free

Free daily Operator credits
Free credits for AI integrations
Publish 1 app
Limited Operator intelligence
Community support only

Kaer Core

For personal projects & simple apps.

$ 2218 per month
billed monthlybilled yearly

Join Core

$20 of monthly credits
Includes up to 5 collaborators
Unlimited workspaces
Autonomous long builds
Remove "Made with Kaer"

Kaer Pro

For commercial & professional builds.

$ 11290 per month
billed monthlybilled yearly

Join Pro

Everything in Core
$100 monthly credits
Includes up to 15 collaborators
Includes up to 50 viewers
Priority compute pool

Enterprise

For enterprise-grade security & controls.

Custom

Everything in Pro
Custom seat limits
SSO / SAML
Advanced privacy controls
Design system support

Ready when you are.

No credit card. No queue. Just a prompt — and an agent that actually does something with it.

Start free See pricing