Open Source Nmap Alternatives
The best open source alternative to Nmap is Angry IP Scanner, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Nmap and 14 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Nmap are Zenmap (Free, Open Source), Port Authority (Free, Open Source), WinMTR (Free, Open Source) and MASSCAN (Free, Open Source).
- A handy systems and security-focused tool, Port Authority is a very fast Android port scanner. Port Authority also allows you to quickly discover hosts on your network and will display useful network information about your device and other hosts. View 37 alternatives to Port Authority
- Free • Open Source