What is the major difference between Zenmap and Nessus?

Related questions

1. What is Shodan dork?
2. Is Shodan free?
3. How do I find my IP address and port number?
4. What is verbosity in nmap?
5. What is the use of Nmap software?
6. What is PN in nmap?

Tags

1. #while
2. #ports
3. #assessments
4. #check
5. #nessus
6. #zenmap
7. #performs
8. #between
9. #scanning
10. #during
11. #vulnerability
12. #difference
13. #major
14. #services