Product market taxonomy distinguishes between endocardial and epicardial LAAO platforms, each subdivided by occlusion mechanism. Endocardial devices—occluding from inside the atrium—capture > 95 % of revenues and separate into occluders (e.g., disc-and-sail nitinol meshes) and plugs (balloon- or disc-shaped foams). Occluders currently hold ~72 % share, favoured for controlled repositionability and robust clinical evidence; plugs represent ~23 %, positioned for cost-sensitive markets. Epicardial systems, deployed on the heart’s outer surface, split into clips (rigid mechanical arms) and loop snares (suture-based tightening), jointly constituting < 5 % share but growing at double digits as surgeons seek fully extravascular closure without oral anticoagulation. Pricing is inversely correlated with invasiveness: occluders average US 7 k, plugs US 5 k, clips US 4 k, and loops < US 2 k. Technology pipelines indicate biodegradable endocardial frames and magnet-assisted epicardial clips, confirming that modality-specific clinical requirements, not commodity substitution, will continue to define segment boundaries.