GA4 and GTM audits in minutes, not days.
Lumen is an automated Google Analytics and Google Tag Manager audit. 100+ checks, findings backed by data, and step-by-step guidance to fix every issue identified.
Live audit running
BigQuery daily export limit exceeded
1 BigQuery link is over the daily export limit, with a peak of 1,477,884 daily events (148% of the 1M limit).
Landing page (not set)
1,979,485 sessions recorded without a landing page set, accounting for 23.3% of all sessions.
Custom HTML injection tags
29 custom HTML tags found in the container. 6 have names that do not reflect their functionality.
Recommended events not used
23 events were found that closely resemble GA4 recommended events but use non-standard names.
Self-referrals
No self-referral sessions detected. Referral exclusions are configured correctly.
Common issues
What Lumen finds.
The most common findings on each platform. Every one of them directly affects the data you make decisions from.
GA4
- (not set) landing pages and inconsistent page paths
- Query parameter cardinality pushing data into (other)
- UTM inconsistencies splitting campaigns in reports
- Custom dimensions collecting no data
- Missing e-commerce funnel events
- Duplicate or suspicious transactions
GTM
- Duplicate tags and overlapping triggers
- Variables referencing missing dataLayer keys
- Unused triggers, orphaned variables, container bloat
- Tags with no consent status configured
- Injection tags with unclear naming or purpose
- Container versions published without change notes
How it works
Four steps from connection to findings.
Connect your GA4 and GTM accounts
Lumen connects via the GA4 Admin API and GTM API. Authorise access once. No exports, no scripts, no developer involvement.
100+ checks run automatically
The audit covers setup and property configuration, event schema, tag governance, trigger logic, attribution, consent mode, and cross-domain handling.
Review findings with fix steps and direct links
Each finding shows the data behind the issue, what to do about it, and a direct link into the relevant tag, trigger, event, or property setting.
Re-audit after you've made changes
Re-run against your updated configuration to confirm fixes are in place. Lumen shows what changed between runs.
Sample finding output
What a finding actually looks like.
94 tags in the container have no consent status configured and fire regardless of user consent state. This creates direct compliance exposure. Review each tag's consent settings, apply built-in consent checks where supported, and add additional consent requirements for tags that set cookies or send data to third parties.
Links directly to the flagged tags in your live GTM account.
299,358 purchase events were recorded against zero begin_checkout events, and view_item and add_to_cart are not collected at all. Funnel and abandonment reporting is impossible. Implement the missing e-commerce events in the dataLayer and add corresponding GA4 event tags so every shopping stage is tracked.
Links directly to these tags in your live GTM account.
Mixed-case mediums split the same channel across 55,521 sessions, and 7 non-standard parameter variants are not parsed by GA4 at all. Standardise UTM casing at the source, fix the malformed parameter names, and adopt a single tagging convention across teams.
Ongoing auditing
Audits that run on your schedule.
Configurations change constantly. Scheduled audits catch issues before they become invisible assumptions in your data.
Scheduled audits
Set a daily, weekly, or monthly cadence and Lumen runs automatically. You're alerted when new findings appear or an existing issue changes in severity.
Re-audit after fixes
After updating your configuration, re-run the same audit to verify the changes resolved the finding. Closed findings are marked resolved in the run history.
Run history and change tracking
Lumen keeps a record of every audit and shows what changed between runs. New issues from a deployment are flagged immediately.
Pricing
Simple, transparent pricing.
Start with a single audit or subscribe for ongoing coverage. All plans include direct GA4 and GTM connection, 100+ checks, and in-app findings with fix steps.
Single Business
- 2 accounts connected: 1 GA4 + 1 GTM
- 8 audit runs per month
- Scheduled audits
- CSV + PDF export
- 1 team seat
- White-label
Professional
- 10 accounts connected (GA4 and/or GTM)
- 40 audit runs per month
- Scheduled audits
- CSV + PDF export
- 1 team seat
- White-label
Agency
- 40 accounts connected (GA4 and/or GTM)
- 160 audit runs per month
- Scheduled audits
- CSV, JSON + PDF export
- Client sharing links
- Unlimited team seats
Enterprise
- Unlimited accounts connected
- Scheduled audits
- Unlimited audit runs
- All export formats
- Unlimited white-label PowerPoint exports
- Full white-label
- Dedicated onboarding
- Unlimited team seats
Single business audit
2 audits for one business: 1 GA4 + 1 GTM. Delivered instantly. No commitment.
Early access
Request early access.
Lumen is in early access. Join the waitlist and we will be in touch with onboarding details and early pricing.
No spam. We will reach out when your spot is ready.