QA built for agentic coding.

Bugs, handled.

Nua finds bugs before your users do, reproduces the ones they report, and turns every fix into a regression test you never think about again.

Ship fast. Break nothing.

app.trynua.dev/inbox
Bug feed /// livelive
  • SENTRY-1042Invite email sends twice when the request retrieshigh ·fix prompt ready
  • LIN-517Cart total goes stale after switching currencymed ·test added
  • BUG BASHPromo code drops after a login redirecthigh ·recording attached
  • SENTRY-1088Duplicate invite on slow connectionshigh ·fix prompt ready
The problem

The expensive part of a bug isn't the fix. It's finding it and reproducing it.

TodayWith Nua
A bug report lands with no steps and no context. A senior engineer loses half a day just making it happen again.
Nua reproduces it first: steps, a screen recording, console errors, network requests. Your dev starts at the fix.
Dozens of reports a day, one or two days to turn each around. Feature work waits.
Every report shows up already reproduced, with a fix prompt ready to paste into Claude Code or Cursor.
The worst bugs are the ones you can't reproduce. They stay open for weeks and come back at the worst time.
If it happened, Nua can show it happening. And once it's fixed, a regression test keeps it fixed.
How it works

A bug report goes in. A ready-to-paste fix comes out.

  1. 01 / Report
    A bug lands in Linear or Sentry.
  2. 02 / Repro
    Nua reproduces it, on video, with the failure context.
  3. 03 / Fix
    Your dev pastes the fix prompt. The fix lands.
  4. 04 / Locked in
    A regression test is added so it never comes back.
Linear · LIN-482Bug
Invite emails going out twice

“Customer says teammates keep getting two invites. Can't repro on my machine. Happens sometimes?”

filed by support · no steps attached
Reproduced by Nua
repro.mp4 · 0:38
  1. 1. Invite a teammate on a slow connection
  2. 2. The request times out and retries
  3. 3. Both requests go through. Two emails send.
captured: console errors · network requests · app state
Fix prompt · ready

The invite request retries on timeout, but the first request already succeeded. Dedupe on the invite token before sending. Repro steps and network trace attached.

→ paste into Claude Code or Cursor. The fix stays yours.
Regression suite
invite-dedupe.spec.tsjust added1.2s
cart-currency.spec.ts0.9s
promo-redirect.spec.ts1.4s
Tests self-heal when your app changes. This bug is done.
01 / Report
A bug lands in Linear or Sentry.
Linear · LIN-482Bug
Invite emails going out twice

“Customer says teammates keep getting two invites. Can't repro on my machine. Happens sometimes?”

filed by support · no steps attached
02 / Repro
Nua reproduces it, on video, with the failure context.
Reproduced by Nua
repro.mp4 · 0:38
  1. 1. Invite a teammate on a slow connection
  2. 2. The request times out and retries
  3. 3. Both requests go through. Two emails send.
captured: console errors · network requests · app state
03 / Fix
Your dev pastes the fix prompt. The fix lands.
Fix prompt · ready

The invite request retries on timeout, but the first request already succeeded. Dedupe on the invite token before sending. Repro steps and network trace attached.

→ paste into Claude Code or Cursor. The fix stays yours.
04 / Locked in
A regression test is added so it never comes back.
Regression suite
invite-dedupe.spec.tsjust added1.2s
cart-currency.spec.ts0.9s
promo-redirect.spec.ts1.4s
Tests self-heal when your app changes. This bug is done.
The bug bash

Nua doesn't wait for bug reports.

It explores your app the way a real user would, plugged into your PRDs, tickets, and customer calls. That's how it finds the bugs nobody thought to write a test for: functional bugs, UX issues, and visual drift from AI-generated components.

Last night's run4 findings
  1. 01
    high· Checkout · 02:14

    Found the promo code that silently drops after a login redirect.

  2. 02
    high· Onboarding · 02:31

    Found the invite link that works twice. Two accounts, one email.

  3. 03
    high· Billing · 02:47

    Found the mid-cycle downgrade that charges the prorated month twice.

  4. 04
    med· Dashboard · 03:05

    Found the AI-generated table that overflows on a 13-inch screen.

Finding bugs used to look like this.

Load-testing a new rail bridge
Locomotives as the proof of safety
Edison at the test bench
The first actual bug, taped into the logbook
Test flight, Cape Canaveral
Human computers checking the math
Rooms of people, checking by hand
Verifying runs on the mainframe floor
Crash testing before the road

Rooms of people, checking by hand.

Then rooms of testers, clicking by hand.

Then scripts that broke every release.

AI made shipping features easy. What customers feel is the last 20 percent. Getting from 80 to 100 is the moat now.

This is how it's done now

It never comes back

Every fix becomes a test that keeps it fixed.

When your app changes, the tests adapt on their own. Nothing you fixed comes back.

app.trynua.dev/activity
Activity /// agent recordedlive
  • nowReproduced SENTRY-1088 · recording attachedreproduced
  • 2mNew onboarding flow detected. 4 tests self-healed.self-healed
  • 9mBug bash: 2 new findings on checkout.found
  • 18mLIN-517 fix verified. Regression test added.locked in
  • 41mNightly regression run · 86 of 86 passedcovered
  • 1hYour app changed. 6 tests adapted.self-healed
Where it pays off

What your team gets back.

01 / Ship features

Put the roadmap back on the roadmap.

When most of engineering goes to maintenance, features slip. Nua takes over finding and reproducing bugs, which is most of the treadmill. Your team gets its weeks back.

02 / Protect senior time

Senior engineers shouldn't be reproducing bugs.

The half-day repro hunt is the most expensive part of every ticket. Nua does the hunt and hands over a fix prompt. Your best people review the fix and move on.

03 / Catch the big one

Find the catastrophic bug before a user does.

The double-sent email. The race condition on checkout. Nua's bug bash explores your app like a real user and finds the failure nobody wrote a test for.

04 / The 2026 way

The AI QA upgrade, without building it yourself.

Teams are duct-taping internal bug-hunting rigs or paying an offshore QA firm. Nua is the third option: log in, connect Linear and Sentry, and it starts hunting.

Under the hood

Nua tests your app like someone who works there. It reads what your team already wrote.

PRDsTicketsCustomer callsSentry
NuaBugs found, reproduced, ready to fix

Get out of the bug business.

We're onboarding dev teams now. Setup is a login, not an integration project. Codebase access is optional. If bug reports are eating your roadmap, we should talk.