On-premises vs. the cloud: what will move your company forward?

Comparison between on-premises and cloud software for companies - which solution drives digitalisation?
Basics

What do on-premise, cloud, and hybrid mean?

With on-premise software, you run applications, databases, and infrastructure yourself or in a controlled environment. Cloud software is provided by external vendors and typically used as a SaaS solution. Hybrid architectures combine both models: existing internal systems stay in place while modern cloud platforms for customer service, CRM, automation, or data analytics are connected alongside them.

In practice, many companies work with historically grown system landscapes, individual processes, and varying requirements around data protection, integration, and scaling. Hybrid architectures that connect modern cloud systems with existing applications are therefore often the most realistic model.

On-Premise

Software, servers, and data are operated internally or managed in a controlled environment. This allows for a high degree of control over infrastructure and data storage, but typically increases the effort required for operations, maintenance, security, and further development.

Cloud

Applications are provided by external vendors and continuously developed. Cloud solutions make scaling, collaboration, and integrations easier, but require clear concepts for data protection, roles, permissions, and data flows.

Hybrid

Cloud and on-premise systems work together. This model is particularly suitable when existing systems need to remain in use while modern platforms still need to be integrated.

Comparison

On-premise vs. cloud: the key differences

Processes, security requirements, existing systems, integration options, and the question of how flexibly your IT landscape needs to respond to change – all of this influences the decision more strongly than technology alone.

Criterion On-Premise Cloud Hybrid
Control High degree of control over infrastructure, systems, and data storage. Control is partly with the vendor; internally focused primarily on processes and configuration. Critical systems remain internal while modern platforms are selectively connected.
Scaling Expansions require additional infrastructure and planning. Resources and user numbers can generally be scaled more flexibly. Scaling depends heavily on integrations and data architecture.
Updates Updates must be planned, tested, and implemented internally. Updates are typically provided directly by the vendor. Cloud and internal systems must remain compatible over the long term.
Security Depends on internal security measures, processes, and resources. Vendors handle many technical safeguards, but configuration and permissions remain critical. Requires clear rules for data flows, roles, and responsibilities.
Integration Legacy systems or missing APIs frequently make modern integrations more difficult. APIs and app frameworks make it easier to connect with CRM, ERP, or BI systems. Particularly well-suited for complex system landscapes with existing applications.
On-Premise

When on-premise still makes sense

Many organisations have good reasons to keep certain systems in-house – whether due to regulatory requirements, specialised applications, or historically grown IT structures.

Typical scenarios

  • heavily customised legacy systems
  • internal applications with no modern cloud alternative
  • regulatory requirements or specific data protection frameworks
  • tight coupling with local infrastructure
  • high requirements for individual processes

Key challenges

  • maintenance and operations
  • security updates
  • scaling
  • missing APIs
  • technical debt from legacy system landscapes

In many projects, the goal is therefore to modernise existing systems step by step: relevant data and processes are connected to modern cloud platforms via APIs, middleware, or custom integrations – without requiring a full system migration.

Cloud

Why cloud software offers more flexibility for many organisations

Cloud solutions offer the greatest advantages when it comes to scaling, collaboration, and integration. In customer service, CRM, or e-commerce, processes rarely run in isolation within a single system – modern teams work with multiple platforms, data sources, and automations simultaneously. Cloud development & strategy can help you build the right setup from the start.

Faster development

New features, automations, and integrations can typically be rolled out much more quickly.

Better collaboration

Teams access information centrally – regardless of location or device.

Stronger integrations

APIs, webhooks, and app frameworks make it easier to connect with CRM, ERP, BI, or support systems. An overview of possible Zendesk integrations is available here.

Hybrid architectures

Why hybrid models are often the most realistic solution

Most organisations already have a grown system landscape: ERP systems, internal databases, specialised applications with custom processes. The decisive question is a practical one: how can modern platforms be connected in a way that allows existing systems to continue operating?

Hybrid makes sense if you

  • want to keep using existing systems
  • want to connect modern customer service or CRM platforms
  • want to modernise step by step
  • don't want to migrate all data
  • need to combine cloud and internal processes

Typical challenges

  • unstable interfaces
  • unclear data flows
  • missing error handling
  • duplicate records
  • lack of transparency between systems
Integration

Connecting cloud and on-premise systems effectively

What matters most is that data flows between systems at all. Modern customer service and CRM processes only run efficiently when relevant information is available where your teams actually work.

This is where APIs, middleware, synchronisations, and custom integrations come in. Systems like Zendesk can be connected with CRM, ERP, e-commerce, or internal platforms without replacing existing processes entirely. See our page on Zendesk CRM integration for cloud and on-premise systems for how this works in practice.

Contracts, orders, contacts, invoices, or product data can be surfaced directly in support and used for automations. If you need custom interfaces or middleware for this, you'll find more information under Zendesk API & custom middleware.

Practical examples

Typical integrations between cloud and on-premise

CRM + Zendesk

Contacts, contracts, or customer data are surfaced directly in the ticket. More on this: Zendesk CRM integration.

ERP + customer service

Order status, invoices, or delivery information are synchronised automatically.

Legacy systems

Existing applications remain in place and are connected via APIs or middleware.

Decision guide

Which solution fits your needs?

Starting point Most likely direction
You want to scale quickly and use modern platforms. Cloud
You have heavily customised internal systems. On-premise or private cloud
Existing systems need to remain in use. Hybrid
Support teams need data from multiple systems. Cloud with API or middleware integration

Cloud or on-premise? We’ll help you figure it out.

Leafworks connects Zendesk with your existing systems – whether CRM, ERP, or internal databases, whether cloud or on-premise. With the right integrations, all relevant data is available exactly where your support teams work: in the ticket, without switching systems, without manual transfers.

We’ve implemented this with companies of all sizes and system landscapes – from historically grown on-premise structures to fully cloud-based setups. Get in touch if you want to know what makes sense for your setup.

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Marvin Post

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