The author
Pierre-Éric Bouchez
Director & Partner, R&D unit
By Pierre-Éric Bouchez, published 25 August 2026
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- Neptune DXP and SAP Fiori both produce SAPUI5 applications; the difference lies in tooling, data and licensing.
- Neptune speeds up development from ABAP, but adds dependency on a third-party vendor.
- Native Fiori relies on SAP standards (OData, RAP, CAP) and on the clean core recommended for S/4HANA.
- Migration is done in batches: both technologies coexist in the launchpad during the transition.
Key takeaways
01
When to keep Neptune
Recent and stable estate, heavy offline use, staying on ECC or on-premise S/4HANA, low licence cost.
02
When to move to Fiori
S/4HANA and clean core project, fewer vendors, screens covered by Fiori elements, scarce Neptune skills.
03
Migrate without disruption
Estate audit, scoping, OData or RAP redevelopment, testing and progressive cutover: the InRize approach.
04
Duration
An audit in a few weeks, then batches of one to three months, testing included.
Sources: Neptune Software, SAP Learning