What access level does Lumnio need?

Viewer access to your GA4 properties and Read access to your GTM containers. Both OAuth and service account methods are supported.

Does Lumnio work on SPAs, React, and Next.js sites?

Yes. Lumnio runs Chromium with progressive hydration, menu expansion, and modal interaction, ensuring JavaScript-rendered content is fully captured.

How does telemetry interception work?

Lumnio launches an automated headless browser that injects a high-fidelity dataLayer proxy at page inception, capturing every push event in real time as a real user would trigger them.

Is my audit data secure?

Yes. Audit reports are locked to your account via JWT authentication. GTM container JSON is processed in volatile memory and never written to disk. OAuth tokens are encrypted at rest with AES-256.

Analytics Audit Engine

Don't report on data you can't trust.

Q: Does Lumnio modify my GTM container or GA4 property?

No. Lumnio connects with read-only OAuth scopes (analytics.readonly, tagmanager.readonly). We cannot write, modify, or publish anything to your GTM container or GA4 configuration.

Lumnio runs a real browser against your live site, intercepts every dataLayer event, and cross-checks it against your GTM container — surfacing every gap your dashboards will never show you.

Run a free audit How it works

100% read-only · Never modifies your GTM or GA4 · No card required

Critical

Warnings

Verified

Critical

Purchase event not firing

GTM trigger mismatch on /checkout/confirm

Warning

ecommerce.value undefined

Missing in 3 of 8 GA4 event tags

Pass

GA4 measurement ID verified

Firing correctly on all 12 audited pages

Process

Three steps to clean data

No manual configuration. No browser extensions. Point Lumnio at a URL and get a complete audit in minutes.

Connect

Authorise your Google account via OAuth for instant, read-only access to your GA4 properties and GTM containers. Or use a service account. Both methods are encrypted at rest.

Scan

Our headless browser navigates your live site, simulates real user clicks, expands menus and modals, and intercepts every dataLayer.push() event — exactly as a real visitor triggers them.

Report

Receive a boardroom-ready executive report, an interactive findings dashboard, annotated screenshots with visual overlays, and copy-paste developer fix scripts — all in one run.

What you can run

Three audits, one engine

Run any one on its own, or all three — each produces its own standalone, downloadable report.

Site audit report — tracking coverage health ring and verdict

Site & dataLayer

A real browser crawls your live pages, simulates clicks, and intercepts every dataLayer.push() — proving which interactions actually fire tracking, with the raw payload kept as evidence.

Site audit

GA4 configuration

Audits property settings, key events, data retention, attribution and the revenue loop — conversion value, Google Ads import and reporting identity — against best practice.

GA4 audit

GTM container

Reconciles tags, triggers and variables — Conversion Linker, Enhanced Conversions, consent mode and marketing pixels — so your ad spend optimises on complete data.

GTM audit

Deliverables

Three outputs, one audit

Every scan produces artefacts for every stakeholder — from board presentations to developer tickets.

PDF / HTML

Executive Report

A structured boardroom brief with severity scoring, business impact statements, and ROI justification for each recommended fix.

Severity-ranked findings
Business impact framing
Visual annotated screenshots

Interactive

Audit Dashboard

An interactive HTML dashboard with filterable findings by severity, tag type, and page — linking each issue back to the exact GTM trigger or GA4 configuration.

Filter by severity & page
Tag-by-tag reconciliation
dataLayer event log

Code

Developer Fix Scripts

Pre-generated dataLayer.push() snippets and GTM custom event implementations that a developer can drop in without needing to understand the full audit context.

Copy-paste GTM snippets
Custom event schemas
Variable mapping corrections

Pricing

Simple, transparent pricing

Five free scans, no card required. For ongoing access, talk to us.

Free Trial

Try Lumnio

Five complete audits — no commitment, no card.

$0 / 5 scans

Full single-page website audit
Complete GTM container analysis
Executive report & dashboard
Developer fix scripts included

Start free audit →

Enterprise & Teams

Custom Access

Ongoing monitoring, site-wide crawls, team seats, and dedicated support.

Custom / contact us

Unlimited site audits
Staging & authenticated environments
Team seats & shared history
Priority support & SLA

Payments secured by Stripe · Read-only access only · Cancel any time

Common questions

Quick answers

Does Lumnio modify my GTM container or GA4 property?

No — never. Lumnio connects with read-only OAuth scopes (analytics.readonly, tagmanager.readonly). We cannot and do not write, modify, or publish anything to your GTM container or GA4 configuration. Your production setup remains completely untouched.

What access level does it need?

Your Google account needs Viewer access to your GA4 properties and Read access to your GTM containers. If you prefer not to use OAuth, you can add our service account as a Viewer — instructions are in Settings after you sign up.

Does it work on SPAs, React, and Next.js sites?

Yes. The audit engine runs Chromium and executes progressive hydration scrolls, proactive menu expansion, and dynamic modal interaction. It waits for JavaScript to fully execute before capturing telemetry — so React, Vue, Angular, Gatsby, and Next.js sites are all handled correctly.

View all questions

Your first audit is free.

No credit card. No setup. Just a URL and two minutes.

Start free audit Talk to us