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