System Conversion
Brownfield
Convert the system you have, in place. History and configuration come with you.
Applications you build now convert with the system and keep running. Nothing built on ECC is thrown away.
Future-proof starts now
S/4HANA Migration: What Happens to the Apps You Have Now?
If you’re planning your S/4HANA migration but aren’t ready to move yet, Neptune helps you build apps that work today and migrate tomorrow. Our low-code platform supports ECC and S/4HANA side by side, so you can modernize now and reduce rework later.
Trusted by 600+ enterprises building on SAP without rebuilds
Who are you
System Conversion, New Implementation, or Selective Data Transition.
SAP names three routes to S/4HANA. Neptune’s role is different in each one, and in one of them it matters less.
Worth being clear about which you are in before you plan anything.
Worth being clear about which you are in before you plan anything.
Selective Data Transition
SDT
A middle route. Selected data and processes move into a new system.
You are already choosing what to carry across, and the application layer is normally something you keep rather than rebuild.
New Implementation
Greenfield
A clean S/4HANA system, with selected data moved in.
A greenfield build is a deliberate reset, so apps built on ECC are a bridge for the years before cutover rather than a permanent asset.
Why wait to innovate?
S/4HANA Migration is Inevitable.
Innovation Does Not Have to Wait.
Neptune enables rapid app development that’s fully SAP-native, letting you modernize, extend, and mobilize SAP systems without disrupting your clean core. Build mission-critical business apps faster and more securely.
High Costs. Low ROI.
Falling Behind.
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High migration costs & ROI uncertainty.
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Outdated user experience frustrates teams.
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Growing gap vs. more agile competitors.
Innovation Under Constraint.
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Limited availability of skilled SAP developers.
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Fear of building apps that won’t survive migration.
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Pressure to reduce tech debt while still delivering.
Innovate today. Migrate tomorrow
One Build.
Two SAP Generations.
Modernization
Deliver Modern UX on ECC.
Fiori-like apps without BTP or costly new hires.
Continuity
Future-proof Your Apps.
Build apps that run on ECC now and move to S/4HANA later.
Efficiency
Lower TCO Now.
Cut time-to-delivery, development costs, and future rework.
Real value without double dev
Speed, Scale and S/4HANA Compatibility.
3
x
faster time-to-deploy new apps
100
%
ECC and S/4HANA compatible apps
50
%
lower custom dev cost vs. traditional methods
0
%
rework on apps when migrating to S/4HANA
Feature highlights
What You Get on Both ECC and S/4HANA.
ECC and S/4HANA Dual Compatibility
Build apps today that work on both ECC and S/4HANA without double
development or future rework.
ABAP, SAPUI5 & JavaScript
Use the skills your team already has and bridge traditional SAP development with modern languages.
Offline and Mobile-First Design
Enable employees in the field or warehouse to work productively even without network access.
UI Prototyping. Drag-and-Drop Design
Speed up delivery with a visual app builder that brings ideas to life without complex coding.
Clean Core Ready and Compliant
Keep your SAP system clean with an approach that avoids modifying core logic or code.
Integration With SAP/Non-SAP Tools
Connect ECC and S/4HANA to modern tools, platforms, and third-party systems fast.
“Neptune is helping us deliver fast, sleek apps on ECC today that we can carry into S/4HANA tomorrow without rewriting a single line of code.”
IT Director
Global Retailer
Frequently
Asked Questions
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