Many people are sure that an open-source payment software is a free-of-charge product, that said, an opensource gateway is a tool for free payment transaction processing. Unfortunately, the reality is a little bit different.
If you find a provider of a free open source gateway, just keep in mind that you will need a PCI-compliant environment (it costs around $20–25K). Plus, you’re supposed to find an acquiring bank to issue merchant accounts for your sub-merchants; which is a quite costly procedure, as you need to go through several integrations: the acquirer integration, merchants onboarding, provisioning, and payment reconciliation. In case you will need new terminal payment solutions, this will entail additional integrations and EMV certifications.
At United Thinkers, we would highly recommend using a flexible open-source payment platform called UniPay Gateway. Of course, this is not free software, just commercial. However, businesses can license their product and then receive access to the source code.
Having access to the code gives you the unique opportunity to develop a system on top of the white label solution. Despite the advanced features available within a white gateway, sometimes businesses are interested in additional functionality which can be added due to the source code. For example, they can need support for 3D Secure, EMV terminals, tokenization, P2PE, processing of cryptocurrency or ACH transactions, etc.
The open-source software packages can include some integration logics, different features for Payment Facilitators, various integrations and implementations, recurring billing and chargeback related features. If you need an EMV integration, or a mobile payments solution, you should license the relevant software to receive the source code that can be easily customized according to your business needs.
You should consider some open source payment gateway providers that offer their services to Fortune 500 companies, like UniPay Gateway. Their main advantage is that the product is developed for large enterprises and can meet any needs of the most demanding clients. Growing medium companies can also afford to license this software and access all features that other licensees already developed and pay a relatively small fee once they get access to the platform. To do that, medium businesses should start processing with a hosted gateway with an option to license source code later and install the product in the data centers, once they grow their transaction volumes.
To learn more information about open-source UniPay Gateway software is available here: UniPay – Payment Gateway Software.