Migration guide
GA4 to Adobe Analytics
Move from GA4 to Adobe Analytics without losing reporting continuity, mapping existing events to a governed solution design.
Overview
What this migration really involves
A GA4 to Adobe Analytics migration is two projects wearing one name: standing up Adobe Analytics correctly, and winding down GA4 without losing the history, integrations and team confidence built on it. Projects that treat it as a single lift-and-shift discover the second project mid-flight — usually at cutover, which is the most expensive possible moment.
Move from GA4 to Adobe Analytics without losing reporting continuity, mapping existing events to a governed solution design. The phased approach below keeps both platforms running in parallel while numbers are reconciled, so cutover is a decision you take on evidence rather than a deadline you brace for. Every phase has an explicit rollback path until decommissioning is signed off.
Just as important is what should not migrate. Legacy platforms accumulate years of unused reports, stale segments and integrations nobody can explain. The assessment phase separates what earns its place in Adobe Analytics from what should be archived — routinely shrinking the migration by a third before it starts.
Process
The migration, phase by phase
- 1
Audit current GA4 events, custom dimensions and reporting usage
- 2
Design the Adobe solution design reference and data layer mapping
- 3
Implement Web SDK in parallel with existing GA4 collection
- 4
Reconcile metrics across both platforms over a parallel-run period
- 5
Rebuild priority reports in Analysis Workspace and enable teams
- 6
Decommission GA4 collection once variance is accepted
Risks
What actually goes wrong
Every migration guide that omits these is selling, not advising.
- Metric definitions differ — expect variance and agree tolerance up front
- Historical GA4 data does not transfer; plan for an archive strategy
- Consent configuration must be replicated exactly to stay compliant
GA4 to Adobe Analytics — frequently asked questions
How long does a GA4 to Adobe Analytics migration take?
Most land in three to six months including the parallel-run window. The drivers are data volume, customization depth on the legacy side and how much historical continuity you need — the assessment phase gives you a committed timeline within two weeks.
Will we lose historical data?
Historical GA4 data does not transfer; plan for an archive strategy We plan this explicitly: what migrates, what gets archived in an accessible form, and what the reporting continuity strategy is during the transition — agreed before cutover, not discovered after.
Can we run both platforms in parallel during the migration?
Yes — a parallel-run window is a standard phase, not an option. Both platforms operate simultaneously while numbers are reconciled and variance is understood, and cutover only happens once you've accepted the comparison. A rollback plan exists until decommissioning.
What does the migration cost?
Scope depends on data volume, integration count and customization depth, so we don't publish a number that would be wrong for most readers. The assessment produces a fixed-price proposal — and often finds scope that shouldn't migrate at all, which is the cheapest work there is.
What goes wrong most often in this migration?
Metric definitions differ — expect variance and agree tolerance up front It's the first thing our assessment checks, and the phased approach on this page exists specifically to surface it while it's still cheap to fix.
Scope your GA4 migration
A short assessment gives you the real timeline, cost range and risk register for your specific setup — before you commit to anything.
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