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HAProxy vs Kemp LoadMaster vs NGINX Plus comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
7.1
HAProxy's open-source load balancer cuts costs, boosts efficiency, improves uptime, reduces staffing, and enhances scalability for users.
Sentiment score
7.4
Kemp LoadMaster is a cost-effective solution that enhances efficiency, security, and offers significant returns quickly in various industries.
Sentiment score
7.5
NGINX Plus boosts website speed and reduces costs, offering superior flexibility and scalability, ensuring significant returns for organizations.
Operational efficiency has improved; we no longer have staff consistently monitoring backend servers during deployment or scaling events, as HAProxy's health checks and hitless reloads allow us to push changes with minimal manual intervention.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
This resulted in a drastic decrease in costs and, at the same time, the accuracy of the hits coming on HAProxy was almost around 100% or 99.99%.
Head of DevOps at TripFactory
I estimate seeing a return on investment with HAProxy, as it significantly reduced staff requirements and enhanced scaling capabilities, particularly when transitioning from NGINX, which faced issues.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
 

Customer Service

Sentiment score
6.5
HAProxy's customer service and technical support are highly rated for quick, expert assistance, though documentation could improve.
Sentiment score
8.8
Kemp LoadMaster support is highly rated for its knowledgeable, efficient team offering quick issue resolution and comprehensive online resources.
Sentiment score
6.9
NGINX Plus offers robust support with responsive engineers, though some lower-tier licenses experience delayed responses; documentation often suffices.
Since we are utilizing the open-source edition, community forums, mailing lists, and GitHub have been invaluable, with typically someone having encountered the same problems we faced.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
My interactions with HAProxy's customer support were limited, but the feedback from my team indicated satisfactory service.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
We have not received technical support from Kemp LoadMaster without a license.
Information Security Engineer at BOK
Response time is good because they have assigned and dedicated support engineers to us, and we have weekly cadence calls.
Senior Information Security Engineer at a tech company with 10,001+ employees
 

Scalability Issues

Sentiment score
7.9
HAProxy efficiently handles scalability, easily adapting configurations for growing traffic, ideal for small to medium businesses and larger environments.
Sentiment score
8.2
Kemp LoadMaster is highly scalable, supporting smooth upgrades and adaptable licensing for both small and large enterprises.
Sentiment score
7.7
NGINX Plus is highly scalable and flexible, easily adapting to various enterprise needs and supporting multiple users and websites.
We manage an automatic load balancing feature where we add HAProxy servers dynamically behind the application load balancer to handle more traffic.
Head of DevOps at TripFactory
HAProxy's scalability is excellent; as our traffic expands, it handles load increases effortlessly.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
For scalability, HAProxy meets my needs, supporting our initial horizontal scaling and then adapting to vertical scaling in a VMware environment.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
Kemp LoadMaster is a scalable solution.
Information Security Engineer at BOK
While some people use NGINX for web servers, my current use case focuses on networking and tunneling, which does not necessitate much scaling.
Senior Software Engineer at Checkit
 

Stability Issues

Sentiment score
8.1
HAProxy is reliable, handles heavy traffic efficiently, with minimal downtime, quick support, and frequent updates enhancing stability and performance.
Sentiment score
8.7
Kemp LoadMaster is praised for its stability, reliability, high availability, and effective server load management with minimal downtime.
Sentiment score
7.8
NGINX Plus is highly stable and reliable, praised for connectivity and performance, despite some scalability challenges in clustering.
This reliability serves as a key reason for our choice, providing us with confidence even when faced with heavy traffic.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
The hot reload feature of HAProxy also really helped us so that we never had to shut it down to reload it.
CEo at CloudPositive
We have reduced a lot of servers, replacing them with one or two HAProxy servers which deliver better performance, accuracy, and an almost 100% success rate with requests.
Head of DevOps at TripFactory
With the license purchase afterwards, if it expires, it begins dropping the HTTP traffic, also the DNS traffic.
Information Security Engineer at BOK
I require ninety-nine point nine percent uptime, and NGINX has been pivotal in helping me achieve this along with our other DNS services.
Senior Software Engineer at Checkit
 

Room For Improvement

HAProxy needs a revamped GUI, improved APIs, better AWS integration, real-time config, enhanced docs, and stronger monitoring and security.
Kemp LoadMaster needs UI, security, documentation enhancements, improved monitoring, automation, analytics, and better cloud integration.
NGINX Plus users seek improved scalability, user-friendly interface, better integration, cost-effectiveness, advanced features, and enhanced support services.
The configuration syntax is powerful yet can become overwhelming for newcomers; a more beginner-friendly interface or a native GUI without relying on third-party tools would ease the onboarding process.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
An easier desktop interface to connect to a remote server and make changes on my PC would be beneficial.
DevOps engineer at a tech services company with 1-10 employees
The reloading functionality is effective as it allows soft reloads without interrupting traffic patterns.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
After that, they said if it was good, we could purchase the license, and while we found it very good, the license cost was too high.
Information Security Engineer at BOK
NGINX could provide a means to generate self-signed SSL certificates.
Senior Software Engineer at Checkit
As with any application, there were initial issues, however, after receiving support, everything was rectified.
Executive Director at Geojit
There were some vulnerabilities in F5.
Senior Information Security Engineer at a tech company with 10,001+ employees
 

Setup Cost

Enterprise users value HAProxy's competitive pricing and cost-effective licensing, especially compared to F5 and Citrix, despite initial setup costs.
Kemp LoadMaster offers flexible, cost-effective licensing and setup with positive user feedback and a 30-day free trial.
NGINX Plus has a modular licensing model with varying costs, offering value but can be expensive compared to alternatives.
Since we use the open-source edition, there are no licensing fees, with the main cost being the infrastructure running on EC2 instances in AWS, which helps maintain low expenses.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
Setting up HAProxy didn't cost anything for me.
DevOps engineer at a tech services company with 1-10 employees
The pricing remains competitive compared to other vendors.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
My use case involves using the free and open-source version of NGINX, making it cost-effective as I haven't incurred any costs.
Senior Software Engineer at Checkit
The solution offers a cost advantage.
Executive Director at Geojit
 

Valuable Features

Users praise HAProxy for reliable load balancing, customization, low latency, open-source benefits, and advanced features like secure traffic management.
Kemp LoadMaster offers ease of use, security features, Azure integration, and cost-effective load balancing for Microsoft applications.
NGINX Plus excels in load balancing, security, and integration, praised for simplicity, efficiency, and superior traffic management features.
By moving all SSL termination to the load balancer, I now manage certificates in a single place, and I can also utilize Let's Encrypt with HAProxy's built-in ACME support, making renewal automatic.
Junior System Administrator & DevOps at a tech services company with 11-50 employees
HAProxy positively impacted our organization by exceeding scalability expectations, initially projected at 200k requests but ultimately handling over 15 million transactions per second without any issues.
Principal Engineer Manager at a manufacturing company with 501-1,000 employees
As a production engineer at that time, I definitely wanted to ensure that the system could handle massive connections, especially since we operated an e-commerce platform where we could not lose any customer calls.
CEo at CloudPositive
We had some issues in patching management, so we deployed this product for virtual patching, the IPS rule, and it gives us very good results because we have very critical servers.
Information Security Engineer at BOK
For API management, the WebSocket, and the WebServer, NGINX provides a cost advantage, value addition, and effective support.
Executive Director at Geojit
The web application firewall feature has helped enhance security for our applications because most of the attacks which are performed on our website are being blocked by it.
Senior Information Security Engineer at a tech company with 10,001+ employees
 

Mindshare comparison

As of April 2026, in the Application Delivery Controllers (ADC) category, the mindshare of HAProxy is 9.4%, down from 12.5% compared to the previous year. The mindshare of Kemp LoadMaster is 6.8%, down from 7.6% compared to the previous year. The mindshare of NGINX Plus is 6.8%, down from 8.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Delivery Controllers (ADC) Mindshare Distribution
ProductMindshare (%)
HAProxy9.4%
NGINX Plus6.8%
Kemp LoadMaster6.8%
Other77.0%
Application Delivery Controllers (ADC)
 

Featured Reviews

Shrinivas Devarkonda - PeerSpot reviewer
Head of DevOps at TripFactory
Handles high traffic efficiently and simplifies complex routing with rule-based logic
I think HAProxy is good as it stands now, but I believe there could be improvements. gRPC has recently been implemented, which is great, along with TLS 1.2 and 1.3 support, and HTTP 2.0 is also available. However, I'm unsure about the benchmark of those HTTP 2.0 requests on HAProxy. If there were any other protocol with better performance than HTTP 2.0, or perhaps mTLS and other similar features, including that in HAProxy would be really great. For improvements, I think that during setup and configuration, the steps provided are neat and clear. Anyone can easily install and configure it. There are many kernel tuning parameters also available, which is great. For specific improvement, in terms of logging, I think printing the full object of the request may help, or if there's a way to reference two requests, it would be beneficial to find a complete session history from a logged-in customer, as it would help analyze customer and user analytics.
IshtiaqKhalil - PeerSpot reviewer
Information Security Engineer at BOK
Displays flexible, user-friendly interface with minor licensing challenges
The product could be improved with a more intuitive interface for complex configurations and more advanced analytics. Additionally, enhanced security features, like a more robust Web Application Firewall, and stronger APIs for better automation would be beneficial. Overall, the main areas for improvement are in strengthening the advanced features to better meet the demands of large-scale enterprise environments. key features for the next release should focus on three areas. First, an enhanced, next-generation security suite with a more powerful Web Application Firewall (WAF) and integrated bot protection. Second, more advanced and customizable analytics dashboards to provide deeper insights into application performance. Finally, greater support for modern, cloud-native environments, including better APIs for automation and seamless hybrid-cloud traffic management
Nadeem-Inamdar - PeerSpot reviewer
Senior Information Security Engineer at a tech company with 10,001+ employees
Advanced policies and web firewall have strengthened application protection and reduced attack traffic
There were some vulnerabilities in F5. They tried to fix it, but the fixes were not available at the time because they were zero days, so they attempted to fix it, but their support was not proper. Their support should be improved because sometimes features which we need for customization take time, and they are sometimes feasible and sometimes not feasible by the team, so their support and the engineering team should improve their product. I would like to see more features regarding customization which should be built into the application, and the tool optimization should be good, and the dashboard should be more crisp and clear.
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Top Industries

By visitors reading reviews
Computer Software Company
14%
Comms Service Provider
10%
Financial Services Firm
10%
Manufacturing Company
9%
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
7%
Government
7%
Financial Services Firm
14%
Computer Software Company
11%
Government
8%
Insurance Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business17
Midsize Enterprise15
Large Enterprise16
By reviewers
Company SizeCount
Small Business24
Midsize Enterprise13
Large Enterprise16
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise1
Large Enterprise11
 

Questions from the Community

Do you recommend HAProxy?
I do recommend HAProxy for more simple applications or for companies with a low budget, since HAProxy is a free, open...
What do you like most about HAProxy?
The solution is effective in managing our traffic.
What is your experience regarding pricing and costs for HAProxy?
Since we used the open-source version, we were not concerned about pricing, setup cost, or licensing.
What is your experience regarding pricing and costs for Kemp LoadMaster?
My primary advice is to carefully analyze your total cost of ownership (TCO) rather than just the initial purchase pr...
What needs improvement with Kemp LoadMaster?
The product could be improved with a more intuitive interface for complex configurations and more advanced analytics....
What is your primary use case for Kemp LoadMaster?
Our primary use case was traffic load balancing and distribution. The solution was essential for managing all inbound...
Which is better - IIS or NGINX Plus?
IIS is a flexible, secure, and manageable web server to host anything on the web. IIS’s scalable and open architectur...
What do you like most about NGINX Plus?
It performs very well. That's one of the primary reasons we use NGINX.
 

Also Known As

HAProxy Community Edition, HAProxy Enterprise Edition, HAPEE
LoadMaster Load Balancer
NGINX
 

Overview

 

Sample Customers

Booking.com, GitHub, Reddit, StackOverflow, Tumblr, Vimeo, Yelp
Kent County Council, KEMP, SMA Solar Technology AG, RT€ Player , Victrix (Quebec, Canada), Texas A&M, Macmillan Cancer Support, Cisco, Austin Bank
Locaweb, AppNexus, Wix, Reliam, Montana Interactive, MuleSoft, Warpwire, Discovery Education, InkaBinka, WordPress.com, Gogo, GOV.UK, NASA
Find out what your peers are saying about F5, NetScaler, HAProxy and others in Application Delivery Controllers (ADC). Updated: March 2026.
885,444 professionals have used our research since 2012.