Mainframe Software Statistics

Largest z/VSE Vendors

Top 20 z/VSE Vendors (out of a total of 98 active z/VSE vendors), ranked by the number of z/VSE software products currently marketed

Vendor Active Supported Inactive Total
1MacKinney Systems310435
2Software AG313135
3IBM2992866
4CSI International271028
5Broadcom1643160
6GSF Software140014
7TPS Systems110011
8Lattwein110011
9Rocket Software102214
10SDS100010
11UNICOM Systems9009
12Data2192011
13Semantic Designs8008
14ASG Software Solutions7108
15Barnard Software7007
16Phoenix Software International6118
17Attachmate6017
18Mantissa Corporation6309
19Software Pursuits6006
20B.O.S. Software Service6006