Mainframe Software Statistics

Largest zVSE/VSEn Vendors

Top 20 zVSE/VSEn Vendors (out of a total of 90 active zVSE/VSEn vendors), ranked by the number of zVSE/VSEn software products currently marketed

Vendor Active Supported Inactive Total
1Software AG314136
2MacKinney Systems310435
3CSI International271028
4IBM1963762
5Rocket Software193426
6Broadcom1641360
7GSF Software140014
821st Century Software110011
9Lattwein110011
10TPS Systems110011
11SDS100010
12Data2192011
13UNICOM Systems9009
14Semantic Designs8008
15Barnard Software7007
16XPS Software6006
17Phoenix Software International6118
18Attachmate6017
19Mantissa Corporation6309
20Software Pursuits6006