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
1	MacKinney Systems	31	0	4	35
2	Software AG	31	3	1	35
3	CSI International	27	1	0	28
4	Rocket Software	19	3	4	26
5	IBM	19	6	37	62
6	Broadcom	16	41	3	60
7	GSF Software	14	0	0	14
8	TPS Systems	11	0	0	11
9	Lattwein	11	0	0	11
10	21st Century Software	11	0	0	11
11	SDS	10	0	0	10
12	UNICOM Systems	9	0	0	9
13	Data21	9	2	0	11
14	Semantic Designs	8	0	0	8
15	Barnard Software	7	0	0	7
16	Phoenix Software International	6	1	1	8
17	Mantissa Corporation	6	3	0	9
18	Attachmate	6	0	1	7
19	Software Pursuits	6	0	0	6
20	XPS Software	6	0	0	6