Do I need a separate vendor for MRZ, visual zone OCR, NFC, and barcode reading, or one unified SDK?

For most businesses, a unified SDK covering MRZ, visual zone OCR, barcode reading, and, where relevant, NFC chip reading is the more practical choice than stitching together separate specialized vendors for each individual capability, and this is reflected in how most established identity-verification products in the market are actually built, as combined solutions rather than single-purpose tools.

The main advantage of a unified approach is that cross-validation between these different data sources, comparing MRZ against visual zone, or either against barcode data, is one of the more valuable fraud-detection techniques available, and it's naturally easier to implement when a single vendor's system already has all the relevant data sources extracted and available for comparison, rather than requiring a business to independently integrate multiple separate vendors and then build its own cross-validation logic on top, which adds real development complexity and maintenance burden.

Integration effort is also generally lower with a unified solution, since a business's development team deals with one SDK, one set of documentation, and one support relationship, rather than managing multiple separate integrations, each with its own API conventions, data formats, and update cycles that need to be kept compatible with each other over time.

There can be legitimate reasons to use separate specialized vendors for specific pieces, for instance, a business with an existing, deeply integrated biometric verification system might keep that provider while adopting a different vendor specifically for document scanning, but this is generally the exception rather than the default approach, and usually reflects a specific existing investment or specialized requirement rather than a general best practice.

For the majority of businesses building or upgrading an identity verification process from scratch, starting with a unified solution covering the core document-reading capabilities (MRZ, visual zone OCR, barcode, and NFC where relevant) is typically the more efficient and maintainable path.

ScanDoc provides exactly this kind of unified coverage, MRZ, visual zone OCR, and barcode reading with cross-validation built in as a standard part of the platform, designed so businesses don't need to separately integrate and reconcile multiple specialized vendors for these core capabilities.