What is System Integrator (SI)?
A system integrator is a consulting firm that implements, configures, and integrates an ERP system on behalf of the customer.
Definition
A system integrator (SI) is a professional services firm that delivers ERP implementations, taking responsibility for design, configuration, data migration, integration with other systems, testing, and go-live support. SIs range from global consultancies handling large, multi-country programs to specialized regional or industry-focused boutiques. They typically provide the project methodology, consultants with product and process expertise, and the labor to translate business requirements into a working configured system. Unlike the software vendor, which sells and maintains the ERP product, the SI provides the implementation services, although some vendors also offer their own professional services. Choosing the right SI, with relevant industry and product experience, is one of the most consequential decisions in an ERP project.
How System Integrator Works in ERP
In an ERP project, the SI usually leads the methodology, runs workshops to capture requirements, configures the system, and manages workstreams such as data migration and integration. They work alongside the customer's project team and key users, who supply business knowledge and make decisions. The commercial relationship is governed by a statement of work that defines scope, deliverables, and responsibilities between the customer, the SI, and the software vendor.
ERP Vendors with Strong System Integrator
SAP S/4HANA Private Cloud
Fully customisable managed-cloud ERP for complex enterprises
Oracle ERP Cloud
Enterprise cloud ERP with deep financials and analytics
Microsoft Dynamics 365
Modular ERP + CRM tightly integrated with Microsoft 365
Infor CloudSuite
Industry-specific cloud ERP suites on AWS
Frequently Asked Questions
What is the difference between a system integrator and a software vendor?
The software vendor builds, licenses, and maintains the ERP product, while the system integrator provides the consulting and labor to implement and configure it for a specific customer. Some vendors also offer their own implementation services, but many customers engage an independent SI.
How is a system integrator different from a value-added reseller?
A VAR resells the ERP software, often bundling its own services, and is common in the small-to-midmarket. A system integrator focuses primarily on delivering implementation services and is more associated with larger, complex projects, though the roles can overlap.