Nmap Alternatives

Smap

passive Nmap like scanner built with shodan.io

GitHub - s0md3v/Smap: a drop-in replacement for Nmap powered by shodan.ioGitHub

Naabu

GitHub - projectdiscovery/naabu: A fast port scanner written in go with a focus on reliability and simplicity. Designed to be used in combination with other tools for attack surface discovery in bug bounties and pentestsGitHub