Codebase QA for Supabase & Next.js

The QA leader your codebase never had.

Harvey checks your whole app — security, tests, performance, data, maintainability — and hands you one readiness verdict you can act on. It's the senior quality review you can't yet justify hiring for.

No database, no credentials, no production contact. Just point us at your repo.

Readiness report
your-saas · main
VerdictNot ready to scale
01Multi-tenant securitycross-tenant read possibleCritical
02Live pen-testboundary crossed, 2 tenantsCritical
03Hotspots3 files hold 60% of churnReview
04Duplication8% duplicated logicReview
05Dead code14 unused exportsClean
06Maintainabilityhand-rolled auth, use a libraryReview
07Performance2 N+1 queries, 1 missing indexCritical
08Test quality41% of tests can't actually failReview
09App Router boundariesserver env reachable from clientReview
10Data classificationPII in 3 unprotected columnsReview
Why this matters

You shipped fast. Do you actually know what you shipped?

No QA team, no senior lead reviewing every merge — just you and an assistant that says it's fine. The result is a codebase you can't see the true state of: which tests can't catch a bug, where the data's exposed, what falls over at scale.

Most founders find out the hard way. To take one example: when researchers reviewed public apps built with AI tools, roughly one in ten was exposing user data — a blind spot no one on the team could see. Shipping fast was the right call. Harvey shows you the real state of what you built — before it costs you.

One audit vs. ten tools

A scanner gives you noise. Harvey gives you a verdict.

You could buy a security scanner, a coverage tool, a perf monitor, and a linter — and still not know if you're ready. Harvey is the senior read that runs all of it and tells you what actually matters for your app.

The whole picture

Ten dimensions in one audit — security, tests, performance, data, maintainability — rolled into a single readiness verdict, not ten disconnected dashboards.

Judgment, not alerts

Ranked by what matters for your codebase — a senior read, not four thousand linter warnings you'll ignore. Every finding comes with the fix.

We prove it, live

Where it counts, we don't just flag — we stand up a copy of your stack and prove it. A cross-tenant leak isn't a warning; it's the row we shouldn't have been able to read.

Tools vs. a leader

The questions a stack of tools can't answer.

Question about your codebaseToolsHarvey
Flags syntax patterns & known CVEs
Which of my tests can't actually catch a bug?
Can one tenant read another's data? proven live
What will fall over when traffic scales?
Where is unprotected PII sitting?
One verdict across the whole codebase 10 modules
Tells me what it did not check

Keep your tools — they're good continuous hygiene. Harvey answers a different question: is this codebase actually ready?

Ten modules · equal weight

Everything Harvey checks before you scale.

No module is the headline. The deliverable is the true state of your codebase across all ten — a readiness verdict, not a single-issue report.

01

Multi-tenant security

Cross-tenant isolation, RLS, auth boundaries.

02

Live pen-test

A real attack on a live copy of your stack.

03

Hotspot analysis

Where complexity and change collide.

04

Duplication

Copy-pasted logic that drifts out of sync.

05

Dead code

What's shipped but never runs.

06

Maintainability

Hand-rolled code with a better replacement.

07

Performance

N+1 queries, missing indexes, Core Web Vitals.

08

Test quality

Which of your tests can't actually catch a bug.

09

App Router boundaries

Server→client leaks, Server Action auth.

10

Data classification

Every piece of PII / PHI / PCI, and where it lives.

How it works

Start free. The full audit goes where a scan can't.

Point us at your repo

Read-only access with git history, or a code archive. No database, no keys, no production contact. Same-day turnaround.

Get your readiness report

All ten modules over your source, in plain English, ranked by what matters — a read on what your code indicates, yours to keep whether or not you buy.

Go deeper

The paid audit does what source alone can't: stands up your stack and proves findings live, tests whether your tests actually catch bugs, and reviews your live database. Different depth — not more of the same.

Start your free scan

Source-only. No database, no credentials, no production contact.

Free indicates · the audit proves

What the free scan can't tell you.

The free scan reads your source and reports what it indicates. A whole class of findings doesn't exist until Harvey runs the deeper tiers — no amount of static analysis can surface them.

Full audit

Proven cross-tenant access

Free scan: flags an RLS policy that looks like it leaks across tenants.

Full audit

Tests that can't catch a bug

Free scan: notes which tests exist and look thin.

What you actually getFree scan$0Connectedfrom $500Full auditfrom $1,000
Reads your source
Findings across all ten modules
False positives triaged out
Fixes named, not just flagged
Reads your production database
Live database + Supabase advisors
Drift between prod and your migrations
PII protection verified in production
Stands up & attacks your app
Cross-tenant access proven on a live stack
Tests broken on purpose to see which fail
Auth, endpoint & service-seam attacks

The free scan is a real ten-module read of your source. Connected adds your live database; Full adds standing up and attacking a running copy — the only way to prove a flaw instead of flagging it.

Transparent pricing

No "book a call to hear the price."

Publishing prices is deliberate — most boutique auditors hide them behind a call. Pricing scales with your codebase size, so a weekend project and an enterprise monorepo never pay the same.

FREE SCAN
$0
  • Source-only, no credentials
  • All ten modules, static findings
  • Same-day, yours to keep
Run the free scan
CONNECTED AUDIT
$500 / from · by size
  • All ten modules, reviewed with real verdicts
  • Live database: RLS, Supabase advisors, drift
  • PII protection verified in production
  • Read-only access — nothing stood up
Start with a free scan
FULL AUDIT
$1,000 / from · by size
  • Everything in the Connected audit
  • We stand up your stack and attack it live
  • Cross-tenant access & auth flaws proven
  • Mutation-tested tests + investor-ready summary
Start with a free scan
Codebase size · measured automaticallyFree scanConnectedFull audit
Small · under 10k lines$0$500$1,000
Medium · 10k–50k lines$0$1,500$3,000
Large · 50k–150k lines$0$3,500$7,000
Enterprise · 150k+ / monorepo / regulated$0CustomCustom

We measure your codebase size during the free scan and quote from it — generated and vendored code doesn't count. Launch pricing; for context, source-only "vibe-code" audits run $1,500–$5,000 and a traditional pentest $4,000–$12,000 regardless of app size.

How we report

Harvey tells you what it didn't check.

An unstated limitation reads as a clean bill of health. So every Harvey report carries a coverage ledger — each module, its status, and the reason if it couldn't run. No silent gaps.

M8 · Test qualitymutation run completeRan
M1 · Multi-tenant securityRLS + auth reviewedRan
M7 · Performance (DB advisors)needs a connected databaseNot run
M10 · Data classification (live)needs a connected databaseNot run
Start free

Find out what's actually in your codebase.

Source-only, no credentials, yours to keep — then see what the full audit can prove that a scan can't.