Post-launch operations layer

Launching is something
everyone can do.
Maintaining is not.

Your app's dedicated second shift — autonomous monitoring, maintenance, fixes, and optimization so you don't have to.

Free tier: 1 app, URL-only. No repo, no credentials, no card required.

AI builders get you to launch.
Then you're on your own.

Cursor, Bolt, Lovable, Replit — they're brilliant for shipping. The moment your app goes live, every bug, every slow query, every 500 error becomes your problem. The code is AI-generated and hard to reason about. The builder who shipped it has moved on.

NightSteward picks up where the AI builder left off. Start with just your URL — no code access required. Prove value first, go deeper when it matters.

170+
Lovable-built apps found with exposed security vulnerabilities in a single audit
$0
Ongoing operations budget for the average indie-built app after launch day
0
Tools that autonomously monitor, diagnose, fix, and operate shipped apps end-to-end

From alert to fix — with your approval at every step

A real workflow, not a diagram. NightSteward never makes a change without showing you what it's doing and why.

01
Issue detected
NightSteward catches the problem
NightSteward — Monitoring · CheckoutApp
CheckoutApp · checkout.yourapp.com
POST /api/checkout → 500 Internal Server Error
Triggered 14 times in the last 22 minutes · First seen 04:12 UTC
Critical
CheckoutApp · API latency
Response time degraded — p95 jumped from 180ms to 4.2s
Correlates with 500 errors — likely same root cause
Warning
CheckoutApp · Frontend
Homepage and product pages loading normally
Issue is isolated to the checkout flow
OK
02
Diagnosis
Plain-English explanation
NightSteward — Diagnosis Report
What's happening
Your checkout endpoint is failing because the Stripe webhook handler expects a price_id field that no longer exists in the request payload. This was likely introduced in the last deploy (2 days ago) when the product pricing model changed from flat-price to tiered, but the webhook handler wasn't updated to match.
Root cause: schema mismatch Affected: 100% of checkout attempts Since: deploy #47 (2 days ago) Fix complexity: Low
03
Proposed fix
Here's what I'd change and why
NightSteward — Proposed Change · api/webhooks/stripe.js
Changes to api/webhooks/stripe.js lines 34–41
const { price_id, quantity } = session.metadata;
const lineItem = await findItemByPrice(price_id);
 
+ const { tier_id, quantity } = session.metadata;
+ const lineItem = await findItemByTier(tier_id);
+ if (!lineItem) throw new Error(`Unknown tier: ${tier_id}`);
Why this fix: Deploy #47 renamed price_idtier_id in the Stripe session metadata to support tiered pricing. The webhook handler was never updated. This patch aligns the handler with the current session format and adds a guard clause to surface unknown tiers explicitly instead of silently failing.
04
Your call
Approve, skip, or edit
NightSteward — Fix Review
Ready to deploy fix #47-a
This change updates the Stripe webhook handler to use the new tier_id field. It's a one-line logic change — no schema migrations, no side effects on other endpoints.
✓ Deploy fix Edit first Skip this time
Autonomy level: Review all fixes (default). You can change this to auto-apply low-risk fixes or full autopilot in settings — see permissions model →
05
Fixed ✓
Deployed and verified working
NightSteward — Post-Deploy Verification
Checkout is working
All post-deploy checks passed · 04:31 UTC
POST /api/checkout returning 200 — confirmed across 3 test transactions
Response time back to baseline (p95: 190ms)
Stripe webhook acknowledged — no new errors in logs
Rollback snapshot saved — revert available if anything degrades
🔴 Alert raised 04:12 🔍 Diagnosed 04:15 ✅ Fixed 04:31 · 19 minutes total

Every stage of keeping an app alive

From uptime to code-level fixes to optimization. NightSteward covers the complete operational lifecycle your app needs after launch.

Live 📡

Monitor

Continuous eyes on your app's health. Catches problems before your users do.

  • Uptime & availability checks (5-min intervals)
  • HTTP response time tracking
  • Frontend rendering integrity
  • User flow health checks
  • Plain-English status reports
Live 🔍

Detect & Diagnose

Not just alerts — actual explanations. Finds what broke and why, in language you can act on.

  • Root cause analysis from live issues
  • Plain-English incident reports
  • Correlates multiple signals automatically
  • Isolates issue scope (frontend vs. backend)
  • Fix complexity estimate before you decide
Live · Pro 🔧

Maintain

Proactive upkeep so your app doesn't rot. Dependency updates, config drift, performance decay — handled.

  • Dependency update monitoring
  • Performance drift detection
  • Configuration rot alerts
  • Security patch notifications
  • Code health trend reporting
Live · Pro

Fix

Code-level fixes, proposed with full transparency. You control what gets deployed and when.

  • AI-generated fix proposals with diff preview
  • Human approval required by default
  • Autonomous deployment after approval
  • Post-deploy health verification
  • Auto-rollback if fix degrades app
Coming soon 📈

Optimize

Performance tuning beyond just uptime. Latency reduction, resource efficiency, query optimization.

  • Database query performance analysis
  • Asset & bundle size recommendations
  • Cache hit rate monitoring
  • Memory & CPU efficiency reports
  • Automated performance regression detection
Roadmap 🚀

Grow

Conversion insights and UX friction detection. Understand how users actually experience your app.

  • Funnel drop-off detection
  • UX friction pattern identification
  • Conversion rate anomaly alerts
  • Session flow analysis
  • A/B test health monitoring

You stay in control.
Always.

NightSteward is designed around progressive trust. It starts with the absolute minimum access — just your URL — and earns the right to go deeper. You control exactly what it can do and when.

🪜

Progressive access

Starts with just a URL. Proves value at every tier before asking for more. URL → GitHub OAuth → deeper integrations. You grant each level deliberately.

🔒

Permission model

Each integration has a defined, minimal scope. You can see exactly what's being accessed and why. Revoke any integration instantly, at any time, from settings.

↩️

Rollback guarantee

Every fix creates a pre-deploy snapshot. If a fix degrades your app, NightSteward automatically reverts. Manual revert available instantly from the dashboard.

Default
Review everything

Every proposed fix requires your explicit approval before deployment. Nothing happens without you.

Auto-fix low-risk

NightSteward auto-deploys fixes rated low-complexity. Higher-risk fixes still require approval.

Full autopilot

All fixes deploy automatically. You get notified after. Post-deploy rollback always available.

Start free. Upgrade when it earns it.

No long-term contract. No surprise costs. Free tier needs only a URL — no code access, no credentials. See full permissions model →

Free

Monitor

$0 forever

Start with just a URL. Continuous health checks, plain-English findings, incident alerts.

🔓 URL access only
  • 3 apps
  • 5-min uptime checks
  • Response time tracking
  • Incident alerts
  • Script audit preview (2 findings)
Start free →
Pro

Audit

$4.99 /mo
1-week free trial

Full script audits. Every finding across all 5 categories. SEO, security, performance, reliability.

🔍 URL + deep audit access
  • 5 apps
  • Full script audits (all findings)
  • Security header analysis
  • SEO & performance scoring
  • Broken link detection
Try free for 7 days →
Premium · AI Included

Autopilot

$49 /mo

500 AI interactions/month included. No API key needed. Full autopilot mode available.

Full autonomous access
  • 20 apps
  • 500 AI interactions/month
  • No API key required
  • Full autopilot mode
  • All Premium BYOK features
  • Priority support
Get full autopilot →
Need more apps? Add-ons coming soon.  ·  See what NightSteward can access per tier →

Not monitoring. Not code review.
The missing layer between them.

Capability Better Stack / UptimeRobot CodeRabbit NightSteward
Uptime & availability monitoring ✓ Yes ✗ No ✓ Yes
Plain-English issue diagnosis ✗ No — just raw alerts ✗ No ✓ Yes
Automated fix proposals with diff preview ✗ No ⚠ On PRs you write ✓ Yes — from live issues
Human approval before deploy ✗ N/A ✓ Yes ✓ Always, by default
Autonomous deployment after approval ✗ No ✗ No ✓ Yes
Rollback if fix degrades app ✗ No ✗ No ✓ Automatic snapshot + revert
Works without code access ✓ Yes ✗ No ✓ Yes — free tier
Built for AI-generated codebases ✗ No ⚠ Partially ✓ Purpose-built for this

What the numbers look like

Early data from beta users. We believe in showing real numbers, not made-up ones.

Beta avg
19m
Mean time from alert to fix proposal
Beta avg
94%
Fix acceptance rate (user approved & deployed)
Beta avg
99.6%
Uptime across monitored apps
Beta avg
0
Unrecoverable outages after NightSteward fixes deployed
NightSteward — Week 1 Report · CheckoutApp
Mar 17 – Mar 24, 2025
Overall uptime 99.8%
Incidents detected 3
Incidents resolved autonomously 2 of 3
Avg response time 210ms ↓ (was 340ms)
Stripe webhook field mismatch Fixed ✓ — 19 min
Missing rate limit on /api/send-email Fixed ✓ — 34 min
Login redirect loop on Safari Pending your approval
3 dependency updates available (1 security patch) Review →
Login redirect loop fix awaiting approval Review →

Built for a specific kind of app. Proud of it.

NightSteward is not for every codebase. It's purpose-built for standard web apps — the kind Cursor, Bolt, Lovable, and Replit produce. If you're running microservices on Kubernetes with a dedicated SRE team, this isn't for you. If you shipped something with an AI builder last month and it's running in production with no ops support — this is exactly for you.

✓ Built for

  • Apps built with Cursor, Bolt, Lovable, Replit
  • 🌐 Standard web apps (Express, Next.js, Rails, Django)
  • 🗄 Postgres-backed, REST or tRPC API architectures
  • 👤 Solo founders and small teams with no dedicated ops
  • 📦 Single-service apps deployed on Render, Heroku, Fly, Vercel
  • 🔧 Apps that need maintaining, not rebuilding

✗ Not built for

  • 🏗 Kubernetes microservices with dedicated SRE teams
  • 📱 Native mobile apps (iOS/Android)
  • 🔀 Exotic or multi-repo monorepo architectures
  • 🏢 Enterprise compliance environments (HIPAA, SOC2 in progress)
  • 🔬 Scientific computing or data pipelines
  • 🎮 Game servers or real-time infrastructure

Launch it. NightSteward takes over from there.

The autonomous second shift for every app that deserves to stay alive after launch day.

Paste your app URL → Start free monitoring