Case Study: Leading Global Insurance Company achieves 4x faster, more accurate mainframe discovery and modernization with CAST Imaging (CAST)

American diversified insurer adopts CAST for discovery of mainframe ecosystem accelerating modernization program – 4x faster & accurate

A leading global American insurance company had migrated 73% of its applications to the cloud but remained dependent on a large on‑premises mainframe—about 110 million lines of COBOL using DB2 and IMS. After six failed attempts with service providers to document and plan mainframe decommissioning (and facing rising vendor costs), the group CIO launched a seventh effort to fully understand the mainframe estate before modernization.

The CIO’s team chose CAST Imaging to automatically discover and document the mainframe and distributed applications. In four weeks CAST’s professional services delivered interactive, accurate visualizations of core services across tens of millions of lines, cutting reliance on scarce SMEs, accelerating discovery (4x faster) and enabling confident, faster modernization planning.