Opensource Npcap source code can be downloaded, compiled and used for internal use.
So Npcap provides as 2 versions for open source and commercial use But as an open source project, it needs some support for costs. Npcap is an open source project and provided free for most cases.
`WinPcap` compatibility is another useful compatibility feature for Npcap.
`Libpcap` API support is very useful where popular applications like Wireshark, tcpdump can use Npcap easily like a native application.
`Loopback Packet Injection` makes Npcap inject packets to the loopback interfaces.
`Loopback Packet Capture` makes Npcap capture loopback interface packet capture which is generally used for different services to communicate on the local host.
If a non-Admin user tries to package capture he should pass UAC (User Account Control).
`Extra Security` will only provide packet capture to the Administrator level users.
`NDIS 6 support` will make the Npcap work with newer Windows operating systems like Windows 10, Windows Server 2016, etc.
Npcap provides a lot of powerful features according to WinPcap. The most important feature of Npcap is support for Windows 10 operating systems where WinPcap only supports up to Windows 7. Npcap is based on WinPcap project which is currently not actively developed. Npcap is created and developed as a Nmap project.