Card Issuing & Processing · Commerce & Payments
Should you build or buy Card Issuing & Processing Platform (Modern / API-First)?
A Card Issuing & Processing Platform (Modern / API-First) is infrastructure software that enables companies to create and manage payment cards — virtual or physical — including authorization logic, spending controls, transaction webhooks, and card lifecycle management, all exposed through developer-friendly APIs. These platforms carry the underlying Visa/Mastercard scheme certification, BIN sponsorship, and PCI-DSS Level 1 compliance so that companies building card products don't have to.
The build-vs-buy decision for Card Issuing & Processing Platform turns on the structural gap between what a software team can build and what scheme certification and BIN sponsorship require, alongside how much differentiation actually lives in the processing layer versus the card product built on top; the specifics decide it.
Build it, buy it, or bridge?
When building makes sense
Building a card issuing and processing platform from scratch is not realistic for most organizations. The barrier is not software complexity — it is Visa and Mastercard scheme certification, BIN sponsorship through a chartered bank, and PCI-DSS Level 1 compliance. Large neobanks like Monzo or Chime have in-housed their core ledger software, but none have replaced the scheme connectivity. That is the structural ceiling on self-build: the ledger software is genuinely buildable and open-source options exist, but the certification overhead is permanent. The case for building a custom layer on top of a certified platform is different — authorization webhooks, custom fraud models, and spending control logic are all reasonable to build in-house. That is an extension, not a replacement. The processing layer itself is increasingly commodity; Marqeta, Lithic, and i2c offer near-identical capabilities, which means the differentiation in any card product lives in the product design, not the processor.
When buying makes sense
Buying a card issuing platform is the standard path because the regulated infrastructure it provides cannot be replicated without obtaining the regulation. Scheme certification requires direct engagement with Visa or Mastercard, formal testing, and ongoing compliance obligations. PCI-DSS Level 1 requires an annual QSA audit and sustaining a security program around cardholder data. Platforms like Marqeta, Galileo, Lithic, and i2c have absorbed those costs and wrapped them in developer-facing APIs. The practical decision becomes which platform's API design, spending control granularity, geographic coverage, and unit economics fit the card product being built. AI is increasingly relevant to authorization decisioning and fraud scoring within these platforms, but the scheme certification and BIN sponsorship constraints are permanent features of the market — software evolution does not eliminate them.
The desk read
Card issuance requires Visa or Mastercard scheme certification, BIN sponsorship through a chartered bank, and PCI-DSS Level 1 compliance. Those aren't software problems. They're regulated infrastructure requirements. Platforms like Marqeta, Lithic, and i2c have built that infrastructure and wrapped it in modern APIs. Large neobanks have in-housed their core ledger software but not the scheme connectivity, which illustrates where the structural ceiling on self-build sits.
The relevant decision for most organizations is which issuer-processor's API design, spending control capabilities, and geographic coverage best fits the card product being built. Thredd and Galileo serve different market segments with different integration models. AI is influencing fraud scoring and authorization logic within these platforms, but the scheme certification and BIN sponsorship constraints are permanent features of the market regardless of how software costs evolve.
Frequently asked
What is Card Issuing & Processing Platform (Modern / API-First)?
A Card Issuing & Processing Platform is infrastructure software that enables companies to create and manage payment cards — virtual or physical — including authorization logic, spending controls, transaction webhooks, and card lifecycle management, all exposed through developer-friendly APIs. These platforms carry the underlying Visa/Mastercard scheme certification, BIN sponsorship, and PCI-DSS Level 1 compliance so that companies building card products don't have to.
When does building Card Issuing & Processing Platform make sense?
Building the processing layer itself is not realistic without scheme certification and BIN sponsorship, which require regulatory engagement that takes years. The viable build case is custom authorization logic and fraud models built on top of a certified platform via its real-time webhook integrations — extension, not replacement.
When does buying Card Issuing & Processing Platform make sense?
For any company building a card product without an existing bank charter or scheme certification, buying is the practical starting point. Platforms like Marqeta, Lithic, and i2c provide the regulated infrastructure as a service, with the decision among vendors turning on API design, geographic reach, and spending control capabilities.
What are the main Card Issuing & Processing Platform vendors?
Representative vendors include Marqeta, Galileo (SoFi), Lithic, i2c. B4 Pro scores the full set.
How do real-time authorization webhooks change the build-vs-buy calculus?
Modern issuer-processors like Marqeta and Lithic expose real-time authorization endpoints where custom logic — fraud models, spending rules, merchant-category controls — can run synchronously before a transaction approves. This lets teams build meaningful card-product differentiation without owning the certification layer, which is the structural part that cannot be replicated internally.