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Nmap Reviews

Vendor: Nmap
4.3 out of 5
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What is Nmap?

Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are available for Linux, Windows, and Mac OS X. In addition to the classic command-line Nmap executable, the Nmap suite includes an advanced GUI and results viewer (Zenmap), a flexible data transfer, redirection, and debugging tool (Ncat), a utility for comparing scan results (Ndiff), and a packet generation and response analysis tool (Nping).

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Nmap is the #16 ranked solution in best Network Monitoring Tools. PeerSpot users give Nmap an average rating of 8.6 out of 10. Nmap is most commonly compared to Zabbix: Nmap vs Zabbix. Nmap is popular among the large enterprise segment, accounting for 47% of users researching this solution on PeerSpot. The top industry researching this solution are professionals from a manufacturing company, accounting for 11% of all views.
Buyer's Guide
Nmap
April 2026
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Nmap mindshare

As of April 2026, the mindshare of Nmap in the Network Monitoring Software category stands at 0.8%, up from 0.5% compared to the previous year, according to calculations based on PeerSpot user engagement data.
Network Monitoring Software Mindshare Distribution
ProductMindshare (%)
Nmap0.8%
Zabbix4.3%
SolarWinds NPM3.6%
Other91.3%
Network Monitoring Software

PeerResearch reports based on Nmap reviews

TypeTitleDate
CategoryNetwork Monitoring SoftwareApr 24, 2026Download
ProductReviews, tips, and advice from real usersApr 24, 2026Download
ComparisonNmap vs ZabbixApr 24, 2026Download
ComparisonNmap vs Auvik Network Management (ANM)Apr 24, 2026Download
ComparisonNmap vs DatadogApr 24, 2026Download
Suggested products
TitleRatingMindshareRecommending
Zabbix4.24.3%95%108 interviewsAdd to research
SolarWinds NPM4.13.6%92%160 interviewsAdd to research
 
 
Key learnings from peers
Last updated Apr 5, 2026

Valuable Features

Nmap's most valuable features include port scanning, service version detection, and OS detection, which are essential for network management and security auditing. It allows users to identify network configurations, discover open ports, and detect vulnerabilities in systems. Additionally, Nmap offers script scanning, integration with other tools, and the ability to perform comprehensive network scans. Its command-line interface is powerful, while its real-time reporting and traffic analysis capabilities enhance usability for diverse security and compliance needs.
  • "This was my first project, and Nmap was the best tool that I have used to date, and I recommend it to everyone."
  • "Nmap is easy to use; it's a command-line interface, and the output is quite good."
  • "It works very nicely for troubleshooting, because when a service isn't running for any of your users, you can use Nmap to check it directly and easily determine whether the service is actually running or not."

Room for Improvement

Nmap users suggest enhancements like a graphical user interface and quicker scanning. They mention network scanning speed and request capabilities for automatic vulnerability assessments. Additional requests include better reporting features, user-friendliness for beginners, and clearer visualization through an updated interface. Users note Nmap’s reliance on the open-source community for development and suggest commercial investments could enhance performance. Improved license models and a focus on modernizing the design are also proposed.
  • "Nmap will be a little difficult for beginners because of the learning curve and the CLI-based system, but once you get the hang of it, it becomes very powerful."
  • "Since I started using Nmap, it has been completely based on the command prompt and I think it would help other users if they implemented a decent GUI as well."
  • "The price is high and could be cheaper."

ROI

Users gained $200 profit from bug bounties using Nmap. Being a complimentary tool, it saves money compared to enterprise scanners, which have specific detection capabilities. Nmap enables significant business growth without financial investment. It assists in efficiently identifying network vulnerabilities, making it valuable for organizations. However, some question the ability to calculate financial return due to its open-source nature.

Pricing

Nmap is predominantly free and open-source, appealing to enterprises seeking cost-effective solutions. However, there are paid professional versions and licensing options available, like perpetual and volume-based licenses, for additional features and support. The perpetual license offers a one-time purchase without renewal costs, while the volume-based license is scalable, suited for enterprises needing extensive scans. Enterprises with specific needs may consider additional services or support contracts.
  • "I am using the free version of Nmap."
  • "The product's pricing is fine. The licensing options for Nmap include perpetual licenses and volume-based licenses. For perpetual licenses, once you purchase it, there's no need to invest in renewals. And for volume-based licenses, enterprise companies can use it multiple times based on the number of users or devices they need to scan. It's a pay-as-you-go model, similar to how you pay for what you use."
  • "Nmap is an open-source product. You don't need a license to install it."

Popular Use Cases

Users primarily utilize Nmap for reconnaissance, identifying open ports, running services, and potential security risks. It aids in OS detection, vulnerability assessment, and network mapping. Nmap is employed by various entities for scanning networks, examining device configurations, and evaluating penetration potential. It enables vulnerability identification and port monitoring while assisting in network troubleshooting and maintaining cybersecurity. Nmap is crucial in industries like manufacturing and government for network inventory management and communication protocol verification.

Service and Support

Nmap's customer service and support are rarely utilized by users. Many users find no need to contact support due to the reliability of Nmap. Instead, users often rely on comprehensive documentation and an active community for assistance. Forums provide ample solutions and guidance, while enterprise users have access to additional support options. Despite lacking formal support, the active community effectively fills this gap for many users, offering timely help and shared expertise.

Deployment

Nmap's initial setup is generally straightforward and simple, often taking a few minutes to complete. Many experienced minimal complexity, benefiting from clear documentation and ease of installation on various platforms, including Linux and Windows. Some found the setup initially challenging due to the technical understanding required, although it became manageable with time. Despite its simplicity, certain users considered specific technical knowledge essential for seamless operation.

Scalability

Nmap scales effectively with ease. Users report it handles large networks well, serving corporations and smaller companies alike. Its scalability receives high ratings despite some concerns about cloud features and speed with extensive networks. Several organizations leverage Nmap across various settings, highlighting its robustness and adaptability. While automation for scaling is limited, it remains dependable, operating seamlessly for extensive networks. Proper server sizing influences its scalability performance.

Stability

Users find Nmap highly stable, often rating it between eight and ten out of ten. It rarely crashes and provides consistent results. Some note varied performance between Linux and Windows platforms, but system downtime is rarely encountered. Updates require manual handling, yet updates keep coming due to active support. Users experience minimal issues, and the tool is noted for its reliability and improvement over time. Nmap's optimization and stability are widely praised.
These insights are based on the in-depth reviews provided by peers to help you make a better buying decision.
Download our Nmap Buyer's Guide for additional reliable information.

Review data by company size

By reviewers
Company SizeCount
Small Business10
Midsize Enterprise1
Large Enterprise11
By reviewers
By visitors reading reviews
Company SizeCount
Small Business61
Midsize Enterprise36
Large Enterprise87
By visitors reading reviews

Top industries

By visitors reading reviews
Manufacturing Company
11%
Government
10%
Construction Company
10%
University
9%
Retailer
7%
Educational Organization
6%
Outsourcing Company
6%
Comms Service Provider
6%
Financial Services Firm
5%
Computer Software Company
4%
Marketing Services Firm
3%
Media Company
3%
Non Profit
3%
Performing Arts
3%
Transportation Company
2%
Healthcare Company
2%
Real Estate/Law Firm
2%
Energy/Utilities Company
2%
Insurance Company
1%
Pharma/Biotech Company
1%
Consumer Goods Company
1%
Legal Firm
1%
Aerospace/Defense Firm
1%
Recreational Facilities/Services Company
1%
Wellness & Fitness Company
1%
Wholesaler/Distributor
1%
Hospitality Company
1%
Training & Coaching Company
1%
Logistics Company
1%

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Nmap customers

Lockheed Martin, Eastern Bank Boston, Perspecta, Harris Corporation, Discovery Communication

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Product Categories

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Nmap Reviews Summary
Author infoRatingReview Summary
Student at a consultancy with 11-50 employees4.5I primarily use Nmap for reconnaissance, finding vulnerabilities through its essential port, service, and OS detection features. It's a stable, scalable, "gold standard" tool, superior to alternatives like Zenmap, and earned me $200 from a bug bounty.
CEO at a tech services company with 11-50 employees4.0I used Nmap to verify communication protocols on a restricted government network, proving no illegal activity. Its valuable real-time reporting tracks traffic effectively, though investment could enhance its capabilities. Nmap's open-source nature suits budget-restricted projects despite competition from commercial tools.
Information Technology Consultant at a outsourcing company with 501-1,000 employees3.5I use Nmap for network scanning to identify devices and assess their status. It's invaluable for network discovery and security auditing. Although it's open-source and looks outdated, it's cost-effective and highly effective when used by knowledgeable users.
Cyber Security Consultant - APAC at Logon Software4.5I use Nmap for vulnerability scanning to identify issues in our network, especially for compliance checks. Its valuable features include port and OS detection. However, the license limits scan frequency, which could be improved for better utility.
Junior Executive - Information Security at sunshine holdings4.5I use Nmap for network inventory management, scanning ports and IP addresses to identify vulnerabilities. Its most valuable feature is the ability to scan numerous ports for security audits. While it's open-source, I notice stability issues needing improvement.
Cyber Security and IT Head at a outsourcing company with 51-200 employees3.5I manage a large network using Nmap to identify vulnerabilities by scanning devices and checking ports. While it's effective in monitoring, it lacks a GUI and can be slow. Compared to tools like Wireshark and Metasploit, it’s unmatched.
vCISO / GRC / Cybersecurity consultant at a tech services company with 1-10 employees4.5I use Nmap for port scanning to assess organizational exposure and validate applications. Its flexibility allows integration with other tools, enhancing cybersecurity efforts. However, it lacks a GUI, and improvements could focus on API development for better functionality.
Senior Manager Network Design at MEEZA, Managed IT Services Provider4.5I find Nmap to be a stable vulnerability assessment tool that effectively scans systems for vulnerabilities, providing clear reports with recommendations. However, it would be beneficial if the free license offered a broader range of features.