Mainframe Software Statistics

Largest z/OS Vendors

Top 20 z/OS Vendors (out of a total of 274 active z/OS vendors), ranked by the number of z/OS software products currently marketed

	Vendor	Active	Supported	Inactive	Total
1	IBM	181	46	371	598
2	Rocket Software	135	38	12	185
3	Broadcom	92	103	16	211
4	BMC	77	51	62	190
5	MacKinney Systems	48	1	3	52
6	Software AG	43	5	2	50
7	UNICOM Systems	38	0	3	41
8	GSF Software	30	0	0	30
9	Levi, Ray & Shoup	20	2	0	22
10	Software Engineering of America	20	0	1	21
11	ASPG	18	0	0	18
12	SDS	17	0	1	18
13	CDB Software	16	0	0	16
14	Vanguard	15	2	3	20
15	21st Century Software	14	0	0	14
16	Tone Software	14	0	0	14
17	Macro 4	14	2	0	16
18	TPS Systems	13	1	0	14
19	Phoenix Software International	12	1	1	14
20	DTS Software	11	0	0	11