Western Digital Red Plus vs Seagate IronWolf

Both lines are on Synology's and QNAP's official compatibility lists — this is not a "which works" question, but a "which fits your machine and workload" one. Everything below is read from the vendors' own HCLs, refreshed daily.

Western Digital Red Plus NAS 426NAS models up to 14TB · 41 part numbers
VS
Seagate IronWolf NAS 617NAS models up to 32TB · 79 part numbers

Western Digital Red Plus prices  Seagate IronWolf prices 

Head-to-head on the official list

Western Digital Red PlusSeagate IronWolf
Listed on official HCLs 426 models 617 models ✓
Largest listed capacity 14 TB 32 TB ✓
Smallest listed capacity 1 TB 1 TB
Part numbers on list 41 79 ✓
Product line NAS NAS

Which should you buy?

Coverage-wise, Western Digital Red Plus appears on more NAS machines (426 vs 617) — for an older or unusual model that margin can matter. Within the same tier, the honest answer is: pick the cheaper part number at your target capacity, then verify it on your exact model's page.

Both lines overlap on 241 NAS models — if yours is one of them, either drive is officially supported.

Popular part numbers (most-listed 12 of 41 / 79)

Western Digital Red Plus

Seagate IronWolf

NAS models that list both lines

These machines officially support both Western Digital Red Plus and Seagate IronWolf — your real decision is workload and price, not compatibility.

QNAP HS-251Full HCL →QNAP HS-251+Full HCL →QNAP HS-264Full HCL →QNAP HS-453DXFull HCL →QNAP QAI-16700Full HCL →QNAP TAS-168Full HCL →QNAP TAS-268Full HCL →QNAP TL-D1600SFull HCL →QNAP TL-D400SFull HCL →QNAP TL-D800CFull HCL →QNAP TL-D800SFull HCL →QNAP TL-R1200C-RPFull HCL →Synology DS1019+Full HCL →Synology DS115Full HCL →Synology DS115jFull HCL →Synology DS116Full HCL →Synology DS118Full HCL →Synology DS119jFull HCL →Synology DS120jFull HCL →Synology DS124Full HCL →Synology DS1515Full HCL →Synology DS1515+Full HCL →Synology DS1517Full HCL →Synology DS1517+Full HCL →Synology DS1520+Full HCL →Synology DS1522+Full HCL →Synology DS1618+Full HCL →Synology DS1621+Full HCL →Synology DS1815+Full HCL →Synology DS1817Full HCL →Synology DS1817+Full HCL →Synology DS1819+Full HCL →Synology DS1821+Full HCL →Synology DS215+Full HCL →Synology DS215jFull HCL →Synology DS216Full HCL →