SAP systems can be deployed in a variety of ways, but for a long time it's been either on-premise solutions or the cloud. If you're looking at your SAP landscape and planning a transformation, you'll want to get this decision right. In fact, it's not just about the tech - it affects every aspect of your business, from flexibility and scalability to cost and long-term strategy.
So, what's the goal here? Simply put, choose the right deployment model for you. One that aligns with your business needs and future growth.
SAP On-Premise refers to SAP systems installed and running on an organisation's own servers, within their own infrastructure. Think: your own servers in your own data centre, your own internal teams managing them, and total control over configuration and customisation.
That means you're responsible for:
Hardware and infrastructure
System maintenance and upgrades
Security and performance
In a typical on-premise setup:
SAP is running on internal servers in your own data center
Your IT teams are handling uptime, performance and data security
Updates are applied on a schedule and are not always mandatory
Customisations are built directly into the system
That gives you:
Total control
A flexible configuration
But requires:
Significant internal resources and expertise
Ongoing maintenance effort
Longer implementation timelines for on-premise deployments
Control: Full ownership of systems and data
Customisation: Ability to modify systems extensively. In fact, many teams keep their existing systems landscapes in place because the implementation approach can be tailored around data governance needs, such as financial reporting
Security control: Internal handling of security policies, which often means stronger data security for sensitive data and better alignment with stringent compliance requirements in regulated on-premise deployments
Stability: Established, well-understood environments that are often preferred as an on-premise solution in complex SAP software estates
High upfront costs: Infrastructure and maintenance expenses, added cost considerations around ongoing infrastructure ownership and internal support
Limited scalability: Expansion requires new hardware
Complex upgrades: Manual and resource-intensive, especially in legacy SAP ECC environments
Slower innovation: New features are not delivered automatically
SAP Public Cloud refers to cloud ERP delivered as a service, with SAP S/4HANA Cloud being the cloud version of SAP ERP.
This includes:
SAP S/4HANA Public Cloud
SAP Business Technology Platform (BTP)
SAP Cloud ERP, including 4HANA Cloud Public Edition
Cloud-based SAP applications
Systems are hosted and managed by SAP or cloud providers. SAP S/4HANA Cloud also includes SAP-managed data protection and compliance measures.
Organisations can access them via:
Secure internet connections
Subscription-based models: a software as a service (SaaS) approach that usually lowers initial upfront costs and reduces upfront costs through a subscription model, making it a scalable SaaS solution
In a cloud environment:
Systems run in shared cloud infrastructure
Updates are delivered regularly and mandatory software updates must be adopted within SAP's release timelines
Resources scale automatically
Users access SAP from anywhere
Rapid deployment is a major benefit - SAP S/4HANA Cloud can often go live in weeks
This gives you:
Flexibility
Faster innovation
Reduced infrastructure management
Scalability: Resources expand as needed - and public cloud solutions are well-suited to changing demand
Flexibility: Easy adaptation to business changes through a scalable cloud solution
Lower infrastructure burden: No need to manage hardware, with managed services handled by the provider for added cost efficiency
Continuous innovation: Regular system updates, reflecting SAP's cloud offerings as central to SAP's strategy and where SAP has invested heavily
Accessibility: Remote and global access
Less customisation: Standardised processes preferred
Dependence on provider: Less direct system control
Change management: Frequent updates require some adaptation
Subscription costs: Ongoing operational expense
There are significant differences between the two models.
SAP on-premise:
Full control
High customisation
Internal management
Higher upfront costs
SAP Public Cloud:
Standardised systems
Managed by provider
Scalable infrastructure
Subscription-based, with lower initial costs. A cloud version of SAP Cloud ERP Private, including SAP Cloud ERP Private as a cloud deployment option, can serve as a midpoint between choosing a fully on-premise method and public cloud.
The shift is more from control and customisation to a focus on flexibility and scalability.
SAP on-premise suits organisations who are after:
Complex customisation - the kind that can't be done as easily in the cloud
A high level of control over their systems - the kind that can be a challenge in cloud
They've already got an established infrastructure - no need to change that at this stage
They have to meet strict regulatory or compliance demands - in which case enhanced security and compliance is a must
SAP public cloud on the other hand is a good fit when:
Agility and scalability are top of mind - things that public cloud does well
You need to implement things in a hurry - public cloud can get you up and running faster
Standard processes are okay with you - you don't need all the customisation of on-premise
Lower upfront costs and less IT overhead are a priority - in which case standardisation on public cloud makes sense
A single tenant private cloud like SAP Cloud ERP Private can be a good compromise for organisations that want a bit more control than public cloud but aren't ready to go all the way back to on-premise.
Many organisations take a hybrid approach:
This can involve:
Putting core ERP on-premise or private cloud
Using public cloud (BTP) for extensions and innovation
It allows:
Stability in the core systems
Flexibility in new development
SAPs modern strategy is all about clean core architecture:
This means:
Keeping your ERP systems standard
Moving custom logic to cloud platforms
SAP public cloud makes this easy:
It encourages standard processes
It enables you to extend your system outside of the core
A typical modern setup might be:
SAP S/4HANA Cloud for ERP - with built in AI and machine learning to improve decisions and automate workflows
SAP BTP for integration and development
Analytics platforms for reporting, real-time analytics and predictive analytics
Or:
Legacy on-premise ERP - often based on SAP ECC
Cloud based extensions and tools
The key is to make sure your systems and business needs are aligned.
When you get it right:
Efficiency - workflow automation and AI means reduced complexity and better performance
Scalability - your systems grow with the business
Visibility - real time data and reporting with AI driven insights supports faster decision making and risk mitigation
Flexibility - you can adapt to change
Cost control - optimised infrastructure and operations
Organisations often struggle with:
No clear strategy - they're not sure if they should go cloud or stick with on-premise
Over customisation - which makes cloud adoption a nightmare
Integration complexity - trying to connect different environments
Change resistance - getting people to adapt to new ways of working
These challenges require:
Clear decision making
Strong governance and data governance
Things change:
Systems evolve
New tools get added
Business needs change
Unless you are on top of it:
Complexity increases
Costs rise
Performance declines
Whether on-premise or cloud ongoing management is a must.
Application Management Services (AMS) can:
Monitor your systems
Optmise performance
Fix issues
Keep things improving
AMS makes sure:
Your systems stay aligned
Value is sustained
SAP consultancy can help you:
Choose the right deployment model
Plan your cloud or on-premise strategy
Align your systems with business processes
Simplify complex landscapes
This leads to:
Better long-term outcomes
Modern SAP landscapes often include a mix of:
On-premise systems
Public cloud platforms (and some organisations also use SAP Sovereign Cloud for local data protection or residency rules)
Integration tools (SAP BTP) - including the integration suite as part of SAP Cloud Solutions
This leads to:
Flexible architectures
Scalable systems
A continuous innovation capability
When it works well:
Your systems are aligned with business needs
Integration is seamless
Data is consistent - thanks to the simplified model in SAP S/4HANA
Infrastructure supports growth - with deployment options and cloud options aligned to business goals
Complexity is under control
The result - an SAP environment that works for the business, not against it.
SAP on-premise: SAP systems hosted on your own infrastructure
SAP Public Cloud: SAP systems delivered as cloud services
SAP S/4HANA Cloud Public Edition: Cloud based SAP ERP platform
SAP Cloud ERP: SAPs cloud-based ERP offering
SAP BTP: Platform for integration and development
SAP Integration Suite: SAP BTP capability for connecting SAP and third-party systems
Clean core: Keeping your ERP standard while extending externally
AMS: Ongoing support and fine-tuning
What is SAP on-premise anyway?
It means you're hosting and totally in charge of your SAP system - think of it as having it installed in your own home.
What is SAP public cloud?
This is where SAP's cloud-based ERP services come in - think SAP S/4HANA Cloud, but delivered to your business as a service.
SAP on-premise or cloud - which is the 'better' one?
The answer to this depends on what your business actually needs and is trying to achieve.
When does SAP on-premise make more sense?
When your business needs to call the shots, get really deep into customising things, or deal with compliance rules that are pretty strict.
Is there some middle ground between on-premise and the public cloud?
Well, yes - something like a private cloud edition where you get a single-tenant deployment can offer a pretty good compromise.
Can SAP be used in a hybrid set-up?
Oh, yeah - loads of businesses have both models in place.
Why are so many companies shifting to SAP cloud?
For the simple reasons of scalability, flexibility and not having to worry about the old IT infrastructure.
SAP on-premise and public cloud aren't mutually exclusive, they're just two different ways to get what you want from SAP. And remember that SAP's got a plan to be moving everyone to S/4HANA by 2027 - that's worth thinking about too. Just pick the balance that's right for your business, and SAP can be a platform that helps you grow, rather than getting in the way.