4
Naabu
Naabu is a free, open-source command-line port scanner that finds valid ports on hosts.
Free planAPILinuxmacOSSelf-hosted
6.8Free plan
Visit
5
Pentest-Tools Port Scanner
Pentest-Tools Port Scanner is a cloud-hosted Nmap-based tool for finding open TCP and UDP ports and services on network targets.
Free planWebAPI
6.8From $95 a month
Visit
6
ScanSearch
ScanSearch runs live, on-demand SYN scans and service detection to show current network exposure for specified targets.
Free planWebAPILinux
6.8From $0.30 a month
Visit
7
NetsCLI
NetsCLI is an open-source network scanner for discovering LAN devices, scanning TCP and UDP ports, querying DNS, and inspecting hosts.
Free planLinuxmacOSWindows
6.6Free plan
Visit
8
eslint-plugin-jsx-a11y
eslint-plugin-jsx-a11y is a free ESLint plugin that checks JSX in React applications for accessibility issues in static code.
Free plan
6.5Free plan
Visit
9
Port Authority
Port Authority is a free Android port scanner for discovering network hosts and viewing information about the device and other hosts.
Free planAndroid
6.5$4.99 one-time
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10
RustScan
RustScan is a free, open-source command-line port scanner for finding open network ports.
Free planAndroidLinuxmacOSSelf-hosted
6.4Free plan
Visit
11
HostedScan Security
HostedScan Security scans websites, servers, networks, and APIs for vulnerabilities, then presents findings in dashboards, alerts, and audit-ready reports.
WebAPI
6.3From $39 a month
Visit
12
Unicornscan
Unicornscan is a free network reconnaissance tool that sends asynchronous, stateless probes and records responses.
Free planWebAPILinuxmacOS
6.2Free plan
Visit
13
Windows Malicious Software Removal Tool
Windows Malicious Software Removal Tool (MSRT) is a free Windows utility for finding and removing prevalent malware threats and reversing changes they made.
Free planWindows
6.2Free plan
Visit
14
Angry IP Scanner
Angry IP Scanner is a free, open-source desktop tool for scanning IP addresses and ports.
Free planLinuxmacOSWindows
6.1Free plan
Visit
15
Nmap Online Scan
Nmap Online Scan is a web service for online network scanning and port discovery using Nmap.
Web
6.1$1.99 one-time
Visit
16
Advanced Port Scanner
Advanced Port Scanner is free Windows desktop software for finding open network ports and identifying programs running on detected ports.
Free planWindows
6.0Free plan
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17
Sherlock Forensics Port Scanner
Sherlock Forensics Port Scanner is a free desktop GUI tool for identifying exposed TCP ports and the services using them.
Free planLinuxWindows
6.0Free plan
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18
HackerTarget TCP Port Scan
HackerTarget TCP Port Scan checks an IPv4 or IPv6 address for common open ports, helping assess an internet-facing service or firewall.
WebAPIExtension
5.9From $120 a year
Visit
19
PortScan.com
PortScan.com checks TCP ports on the public IP address making the request and reports whether they are open, closed, or filtered.
Free planWebAPI
5.9Free plan
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20
PortScannerLabs
PortScannerLabs is a free web tool for checking an IP address or domain for common open, closed, or filtered network ports and flagging risky exposures.
Free planWeb
5.8Free plan
Visit
21
Port Scanner Software
Port Scanner Software is Windows desktop software that scans specified hosts across server port ranges and reports which ports are open or closed.
Windows
5.6$19.99 one-time
Visit
22
ZMap
ZMap is a free, open-source command-line scanner for Internet-wide network surveys.
LinuxmacOSSelf-hosted
5.6
Visit
23
Port Scanner ActiveX Control
Port Scanner ActiveX Control is paid Windows software for developers adding network port scanning to desktop applications.
Windows
5.5$300 one-time
Visit
24
portwave
portwave is a free command-line scanner for IPv4 and IPv6 targets on Linux, macOS, and Windows.
LinuxmacOSWindows
5.5
Visit
25
SolarWinds Port Scanner
SolarWinds Port Scanner is the open-port scanning feature in Engineer’s Toolset, a network suite with more than 60 tools.
Self-hostedWindows
5.5
Visit

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