ERP Comparison
Custom ERP vs SAP — An Honest Comparison
SAP is a market leader for good reasons. But it's not the only option — and not always the best fit.
Updated 24 September 2026
The short answer
Choose SAP when you need a globally standardised ERP with certified industry modules, multi-country compliance out of the box and a large partner ecosystem — and you have the budget (typically 100,000–500,000+ EUR over three years) and 6–18 months to implement it. Choose a custom ERP when your operations do not fit standard modules, per-user licensing keeps growing, or you need deep integration with existing systems — typically 40,000–120,000 EUR over three years and 3–6 months to a first release.
| Custom | SAP | |
|---|---|---|
| Total cost (3 years) | 40,000-120,000 EUR | 100,000-500,000+ EUR |
| Implementation | 3-6 months | 6-18 months |
| Customization | Full control | Limited |
| Systems integration | Included | Add-on required |
| Data ownership | Full control | Limited |
| Team training | Included | Add-on required |
| Custom modules | Full control | Included |
| Scalability | Included | Included |
| Reporting | Full control | Included |
| Updates | Included | Add-on required |
Custom Solution
Pros
- Built exactly for your operational processes
- Significantly lower total cost in the long run
- Faster and more flexible implementation
- No expensive per-user licensing fees
Cons
- You don't get SAP's vast ecosystem
- Requires a dedicated dev team or trusted partner
SAP
Pros
- Industry standard with built-in best practices
- Vast ecosystem of certified modules and integrations
- Recognized by auditors and global partners
Cons
- Very high licensing and implementation costs
- Complex implementation taking months or years
- Difficult and expensive to customize
When does a custom ERP make sense?
- 01 Your processes don't fit standard SAP modules
- 02 Your budget doesn't allow for the SAP initial investment
- 03 You need flexibility and rapid iterations
- 04 You want to avoid single-vendor lock-in
- 05 Your team needs a simplified interface, not SAP's complexity
What drives the cost of a custom ERP
- Number of modules in the first release (inventory, purchasing, production, sales, finance)
- Integrations with accounting, warehouse, e-commerce, banking and CRM systems
- User roles, approval workflows and audit trails
- Data migration from spreadsheets or a legacy ERP
- Reporting and dashboard requirements
- Ongoing maintenance, usually 10–15% of the build cost per year
What drives the cost of SAP
- Licences or cloud subscriptions, usually priced per user
- Implementation partner fees, often the largest single cost
- Customisation beyond standard modules
- Training for end users and key users
- Hosting or cloud subscription and infrastructure
- Upgrades and ongoing partner support
Other options worth considering
- SAP Business One
- SAP's product for small and mid-size companies — lighter than S/4HANA, still bound to SAP's data model.
- Microsoft Dynamics 365 Business Central
- Cloud ERP for SMEs, a natural fit if you already run Microsoft 365.
- Odoo
- Modular, open-source-based ERP; affordable to start, but heavy customisation needs specialist developers.
- Oracle NetSuite
- Cloud ERP popular with fast-growing and multi-entity companies.
- Hybrid approach
- Keep standard accounting software and build only the operational modules that make your business different. Often the best value for mid-size companies.
Questions to answer before you decide
- 01 Which of your processes are genuinely unique, and which are standard accounting or HR?
- 02 How many users will need access in three years, and what would per-user licences cost at that size?
- 03 Which systems must the ERP integrate with on day one?
- 04 Do you need multi-country statutory reporting out of the box?
- 05 Who will own and maintain the system after launch — an internal team or a partner?
Frequently Asked Questions
How much does a custom ERP cost?
A custom ERP starts from 40,000 EUR for a basic system and can reach 120,000 EUR for a complete solution. Over 3-5 years, the total cost is usually lower than SAP.
Can it fully replace SAP?
It depends on your needs. A custom ERP can cover 100% of your specific operational requirements, but SAP offers modules for almost anything. We'll evaluate your specific case.
What happens if the business grows?
A custom ERP built on modern architecture (microservices, cloud-native) scales excellently. There are no artificial licensing limits.
How do you ensure compliance?
We integrate compliance requirements (GDPR, local accounting, etc.) directly into the system. The source code is yours, giving you total transparency.
Think a custom ERP might be right for you?
Let's analyze together whether a custom ERP or SAP is the right choice.