You will find below Security solutions in most of the companies. I have added top 5 vendors for each solution type. These top 5 are pesonal choice.

It can be different than yours. Dont hesitate to comment for any rectification. Or if i should add any new category in list.

  1. NAC.

2. XDR

Nice artical on XDR. Its compared with SIEM.

https://view.secureworks.com/xdr-vs-siem/p/1

3.SIEM

4. SOAR

5. Vulnerability assessment.

6. WAF

7. Firewall

8. Container security

9. CI/CD Pipeline

10. Application security.

11. Pentest.

12. Risk management and vendor assessment

13. IAM

14. DLP

15. CASB

16. CSPM (Cloud Security Posture Management)