Should you purchase an ERP system or build one from scratch?

Last Updated: 

March 11, 2025

If you plan to implement an ERP solution to streamline accounting, procurement, and other day-to-day business processes, you have to decide whether to purchase it or develop one from the ground up. Understanding the differences between both options is essential for making a sound choice. 

To help you clear things up, we highlight the key differences between custom ERP platforms and off-the-shelf ERP solutions, guiding you in selecting the most suitable option based on your specific business case.

Key Takeaways on Purchasing an ERP System vs Building One

  1. Functionality Differences: Off-the-shelf ERP solutions may have excessive or insufficient features, while custom ERP systems are tailored to meet your exact business needs.
  2. Implementation Speed: Ready-made ERP solutions are quicker to implement since they are pre-built, while custom ERPs require time for development and testing.
  3. Cost Considerations: Off-the-shelf solutions have lower initial costs but may become expensive over time due to licensing fees, whereas custom ERPs can be more cost-effective in the long run.
  4. Ease of Adoption: Custom ERPs are designed around your employees' workflows, making them easier to adopt, while platform-based ERPs may require additional training.
  5. Customisation Flexibility: Custom ERP systems offer near-unlimited customisation capabilities, while off-the-shelf solutions have restricted flexibility.
  6. Scalability Factors: Custom ERPs can be scaled freely based on your infrastructure, whereas platform-based ERPs have scalability limits set by the vendor.
  7. Support and Maintenance: Off-the-shelf ERPs typically include basic support, while custom ERPs rely on internal teams or third-party developers for maintenance.
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The key difference between custom-built and platform-based ERP solutions

Off-the-shelf ERP software solutions are distributed by vendors to many different companies through either subscription-based or one-time purchase models, with examples including NetSuite, Odoo, and Dynamics 365 Business Central. In turn, custom ERP software is a solution that is tailor-built for one particular company and used individually by that organisation. To uncover core distinctions between these types of software, we evaluate both options from multiple perspectives. 

Functionality

A functional set provided by an off-the-shelf ERP solution is predefined by its vendor, and this functionality can be insufficient or excessive for your company. Meanwhile, the functionality of custom ERP software will match the unique functional requirements of your company 100% since the solution is initially built around them.

Implementation speed

The process of implementing a custom ERP system can be lengthy and time-consuming, as such a solution must be designed, developed, and tested first. Since off-the-shelf ERP solutions are ready-made and do not require development from scratch, companies typically implement them quicker.

Implementation cost

The initial costs of adopting a platform-based ERP system are typically lower compared to custom ERP implementation since your company does not need to spend resources on full-fledged development. However, financial expenses can increase over time due to recurring licensing fees. In this context, custom ERP adoption can be more cost-efficient in the long term, as your company does not need to pay for user licences.

Ease of adoption

Custom ERP software developers study your employees' workflows and consider their needs, expectations, and digital maturity during the development making it easier for your business users to adopt the new solution. With platform-based ERP solutions, users may require additional time to get used to the new platform and be able to use its functionality to the fullest extent.

Customisation capabilities

Off-the-shelf ERP systems offer various customisation capabilities, depending on a particular vendor, but still, they are always limited. At the same time, companies can customise and modify custom ERP solutions in alignment with evolving business needs with almost no limitations (as long as a company possesses the required financial, human, and infrastructure resources).

Scalability

The scalability of a platform-based ERP solution is determined by its vendor and is limited by the capabilities of a vendor's IT infrastructure. Meanwhile, custom ERP software can be scaled without restrictions if a company's infrastructure can support this scale.

Support

Typically, first-line support is included in all basic pricing and subscription plans of turnkey ERP software, but you will have to pay an additional fee for more advanced support services. The support and maintenance of a custom ERP system are controlled and done by your company's internal IT team or a third-party developer.

Deployment model

A company initiating custom ERP development has complete freedom of choice regarding where and how to host its ERP system (whether to host it on-premises, in the cloud (private or public), or use a hybrid approach). In turn, when a company implements an off-the-shelf ERP system, it can only choose among the deployment options provided by the vendor.

How to decide between turnkey and custom ERP systems?

To decide which type of ERP software is best to choose, you should take into account the specifics of your unique business case.

When to choose a turnkey ERP system

  • Your company has limited financial and technical resources to develop an ERP system from the ground up.
  • Your business processes and workflows are conventional and typical for your industry, therefore a ready-made ERP system most likely won’t require significant customisations.

When to opt for a custom ERP solution

  • Your workflows are non-trivial, and the functionality of a ready-made ERP solution can not cover them effectively.
  • You want to avoid recurring licensing expenses and reduce ERP implementation costs in the long run.
  • Your business is growing rapidly, and you want to be able to scale and customise the ERP system on demand without any restrictions.
  • You work in a highly regulated industry that has strict regulatory requirements.

Final thoughts

If you are considering implementing an ERP system, you will inevitably have to decide - to buy a ready-made solution on the market or to build your own system from scratch. You should carefully compare both options and weigh the strengths and weaknesses of ready-made vs. custom-built ERP solutions to make a grounded decision. You should also consider the specifics of your business case, as both types of solutions may be better suited to different scenarios. 

If you have difficulty making the final choice, consider consulting with third-party ERP experts. They will study the unique requirements of your business, map out your work processes, and help you define the most relevant ERP solution based on the business analysis results. If necessary, experts can also provide you with technical implementation support, whether customising an off-the-shelf ERP system or engineering and testing a bespoke ERP system.

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