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
1	MacKinney Systems	31	0	4	35
2	Software AG	31	3	1	35
3	IBM	29	9	28	66
4	CSI International	27	1	0	28
5	Broadcom	16	43	1	60
6	GSF Software	14	0	0	14
7	TPS Systems	11	0	0	11
8	Lattwein	11	0	0	11
9	Rocket Software	10	2	2	14
10	SDS	10	0	0	10
11	UNICOM Systems	9	0	0	9
12	Data21	9	2	0	11
13	Semantic Designs	8	0	0	8
14	ASG Software Solutions	7	1	0	8
15	Barnard Software	7	0	0	7
16	Phoenix Software International	6	1	1	8
17	Attachmate	6	0	1	7
18	Mantissa Corporation	6	3	0	9
19	Software Pursuits	6	0	0	6
20	B.O.S. Software Service	6	0	0	6