1. Akamai Technologies Inc.
2. Alibaba Group
3. Amazon Web Services Inc.
4. Applicure Technologies Ltd.
5. Barracuda Networks Inc.
6. Citrix Systems Inc.
7. Cloudflare Inc.
8. F5 Networks Inc.
9. Fastly Inc.
10. Fortinet Inc.
11. Imperva Inc.
12. Lumen Technologies
13. Microsoft Corporation
14. NSFOCUS Inc.
15. Oracle Corporation
16. Penta Security Systems Inc.
17. Positive Technologies
18. Qualys Inc.
19. Radware Ltd.
20. Sophos Group PLC
21. Trustwave Holdings Inc.