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AI APP BUILDER + TEST LAB

Build the app.Test the mess.

Shipmunk turns one sentence into a working app, then tests it against resettable tools and simulated user journeys. Closed beta

app.shipmunk.ai
Support triage27,400 creditsSRSam Rivera
What do you want to build?
Describe it in a sentence. Shipmunk builds it, then proves it in a sandbox.
Build an MVP
A web app where my team picks lunch from nearby places, sees one combined order and gets a reminder before the cutoff.
01 · THE PROBLEM

A preview isn’t proof.

Anyone can generate an app in minutes. Nobody knows if it survives the first real user who pays late, cancels or types the wrong thing.

my-booking-app.preview
!
Something went wrong
TypeError: cannot read 'id' of undefined
First real user · checkout
  • ✕Self-checks pass, then fail on real data.
  • ✕A 404 where your app used to be.
  • ✕A silent queue, no idea what’s happening.
  • ✕An app that wipes its own data.
10 days 1 hour.

See a working, tested version of your idea or feature in an hour, not ten days.

02 · WHO IT’S FOR

Built for two kinds of builders.

NON-TECHNICAL FOUNDERS
You can describe it. You can’t tell if it works.

Say the idea in a sentence. Get an app that has already been used by simulated customers before yours arrive. Closed beta

PRODUCT AND ENGINEERING TEAMS
Test the feature before you commit the code.

Try a new feature against realistic tools and users on day one, without touching your codebase. Closed beta

Sandbox · Refund agentdemo run
SIMULATED TOOLS
Gmail3 threads
Stripe12 orders
Slack#support
Zendesk5 tickets
SeededRunningSnapshotReset
09:41:02Complaint email received+1 thread
09:41:04Order #1043 looked up$64.00
09:41:05Refund created−$64.00
09:41:06Posted to #support+1 message
09:41:07Ticket #88 set to solvedopen → solved
5 changes · nothing real was touched
03 · SANDBOX Closed beta

Use realistic tools without touching production.

Seed Gmail, Stripe, Slack, Calendar, HubSpot and Zendesk with test data. Run the workflow, inspect every change, then reset.

04 · PERSONA TESTING Closed beta

One app. More than one way to use it.

Replay the same journey with users who hesitate, mistype, cancel, retry or misunderstand the interface.

Persona runs · Checkout flowdemo run
JOURNEYSIGN UPBROWSECHECKOUTCONFIRMTIMERESULT
FFirst-time founder
2m 14sPassed
IImpatient operator
0m 41sFailed
CCautious buyer
3m 02sPassed
KKeyboard only
2m 48sPassed
RRetries after error
2m 31sPassed
Evidence · Impatient operatordemo run
SCREENSHOT · STEP 3
Order #1043$64.00
Pay $641
EXPECTED
One charge
OBSERVED
Two charges
TRACE
  1. userClicks “Pay $64”
  2. userClicks again after 0.4 s
  3. toolstripe.charges.create
  4. toolstripe.charges.create
  5. stateTwo charges on order #1043
Review point: disable Pay after the first click.
05 · EVIDENCE Closed beta

See the failure, not just the score.

Each run connects the user action, tool call, screenshot and resulting state so your team can reproduce what happened.

06 · OPTIMIZE

Compare models on identical work.

Keep the task, data and scoring fixed. Change the model and compare quality, runtime and estimated cost.

Compare models · Invoice readerdemo data
Same taskSame seedSame scoringTarget 95%
MODELPASS RATETIMECOSTVERDICT
Model A96%4.1 s190 creditsIn use
Model B95%2.6 s60 creditsGood choice
Model CClosed beta81%1.9 s20 creditsBelow target
Demo data · 412 cases · cost per case, estimated from dated prices
07 · WHY SHIPMUNK

Why not just use Claude Code or Codex?

They’re great at writing code. Shipmunk answers a different question.

01
Code tools write code. Shipmunk tests behavior. Closed beta

A diff tells you what changed. A Sandbox run shows what the app actually did when someone used it.

02
A world to test against. Closed beta

Stateful Gmail, Stripe, Slack, HubSpot, Calendar and Zendesk with seed, snapshot and reset. AI personas use the app, and every step shows expected against actual state.

03
One build, one quote, one receipt.

The price is quoted before anything runs. You get back the app and a record of what was tested.

The Sandbox is the rehearsal.

Launching still requires live accounts, provider approval and production checks. Shipmunk helps you reach that stage with fewer unknowns.

Give the idea somewhere safe to fail.

Build in Sandbox View a sample run