Mainframe Software Statistics

Largest zVSE/VSEn Vendors

Top 20 zVSE/VSEn Vendors (out of a total of 91 active zVSE/VSEn vendors), ranked by the number of zVSE/VSEn software products currently marketed

Vendor Active Supported Inactive Total
1MacKinney Systems310435
2Software AG313135
3CSI International271028
4Rocket Software193426
5IBM1963762
6Broadcom1641360
7GSF Software140014
8TPS Systems110011
9Lattwein110011
1021st Century Software110011
11SDS100010
12UNICOM Systems9009
13Data2192011
14Semantic Designs8008
15Barnard Software7007
16Phoenix Software International6118
17Mantissa Corporation6309
18Attachmate6017
19Software Pursuits6006
20XPS Software6006