Mainframe Software Statistics

Largest z/VSE Vendors

Top 20 z/VSE Vendors (out of a total of 100 active z/VSE vendors), ranked by the number of z/VSE software products currently marketed

Vendor Active Supported Inactive Total
1CA Technologies596570
2MacKinney Systems310435
3Software AG313135
4IBM3092867
5CSI International271028
6GSF Software140014
7TPS Systems110011
8Lattwein110011
9Rocket Software102214
10SDS100010
11UNICOM Systems9009
12Data2192011
13Semantic Designs8008
14ASG Software Solutions7108
15Barnard Software7007
16Attachmate6017
17Mantissa Corporation6309
18Software Pursuits6006
19B.O.S. Software Service6006
20XPS Software6006