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HAProxy vs Microsoft Azure Application Gateway comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 2, 2025

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
6.1
Microsoft Azure Application Gateway enhances ROI by reducing infrastructure costs, simplifying setup, and using cost management tools for accurate assessments.
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
Microsoft Azure Application Gateway significantly impacts our cost savings while maintaining higher performance.
IT Manager at Chong Hua Hospital
If we can use a shared resource, then the return on investment is really nice.
Cloud Specialist at a tech services company with 10,001+ employees
We have seen a return on investment in terms of time-saving and cost-saving by not creating our own infrastructure.
Information Security and Compliance Officer at Carnation
 

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
6.4
Microsoft Azure Application Gateway support experiences vary; some praise expertise, while others criticize delays and inconsistent quality.
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
I would say they provide the best support for Application Gateway because they own the product, so their support is top-notch.
Cloud Specialist at a tech services company with 10,001+ employees
There is room for improvement, specifically in paid support, by providing more direct contact.
Information Security and Compliance Officer at Carnation
I would rate Microsoft support as good because they have a very skilled technical support team in the background
Cloud Head at White-Spunner & Associates
 

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
7.4
Microsoft Azure Application Gateway provides scalable solutions but has mixed reviews regarding cost and ease of scaling and upgrades.
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
Microsoft Azure Application Gateway is a very scalable product.
IT Manager at Chong Hua Hospital
It has the autoscaling feature, so there is not much concern around performance; it can scale significantly.
Cloud Specialist at a tech services company with 10,001+ employees
Microsoft Azure Application Gateway is a scalable solution.
Cloud Head at White-Spunner & Associates
 

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
7.6
Microsoft Azure Application Gateway is stable and reliable, with high ratings, despite occasional issues due to misconfiguration.
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.
Co-Founder, CEO at a tech services company with 1-10 employees
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
We have been using it for the past two to three years, and there have been good results with no problems so far.
Cloud Specialist at a tech services company with 10,001+ employees
The stability is good, and except for a few instances, I don't see the non-availability of Azure Cloud services.
Cloud Head at White-Spunner & Associates
 

Room For Improvement

HAProxy needs a revamped GUI, improved APIs, better AWS integration, real-time config, enhanced docs, and stronger monitoring and security.
Microsoft Azure Application Gateway is criticized for high costs, complexity, lacking documentation, and needing improvements in security, scalability, and support.
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
One feature I mentioned is the support for non-HTTPS protocols such as TCP, which could allow one endpoint for all kinds of protocols.
Cloud Specialist at a tech services company with 10,001+ employees
There is room for improvement in terms of support, such as assigning agents directly for more straightforward engagement.
Information Security and Compliance Officer at Carnation
In future releases of Microsoft Azure Application Gateway, I would like to see more AI functionalities and a better dashboard as well as some customizations.
IT Manager at Chong Hua Hospital
 

Setup Cost

Enterprise users value HAProxy's competitive pricing and cost-effective licensing, especially compared to F5 and Citrix, despite initial setup costs.
Microsoft Azure Application Gateway's cost is debated; appreciated for scalability but potentially expensive with additional fees compared to AWS.
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
We would prefer to have it cheaper, but it is still expensive.
Cloud Specialist at a tech services company with 10,001+ employees
Azure solutions are quite expensive.
Information Security and Compliance Officer at Carnation
When it comes to pricing for Microsoft Azure Application Gateway, I would rate it a seven out of ten.
IT Manager at Chong Hua Hospital
 

Valuable Features

Users praise HAProxy for reliable load balancing, customization, low latency, open-source benefits, and advanced features like secure traffic management.
Microsoft Azure Application Gateway provides secure, efficient traffic management with integration, automation, and scalability benefits for straightforward application deployment.
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.
Co-Founder, CEO at a tech services company with 1-10 employees
We are using it for some of the security features for our applications, particularly for securing traffic in transit with SSL.
Information Security and Compliance Officer at Carnation
The Web Application Firewall (WAF) in Microsoft Azure Application Gateway has been very effective in protecting applications from security threats.
IT Manager at Chong Hua Hospital
The gateway's Web Application Firewall feature enhances security as it is the first entry point to your network from the outside world.
Cloud Head at White-Spunner & Associates
 

Categories and Ranking

HAProxy
Ranking in Application Delivery Controllers (ADC)
3rd
Ranking in Web Application Firewall (WAF)
14th
Average Rating
8.2
Reviews Sentiment
7.2
Number of Reviews
47
Ranking in other categories
Distributed Denial-of-Service (DDoS) Protection (6th), Bot Management (7th), Service Mesh (2nd)
Microsoft Azure Application...
Ranking in Application Delivery Controllers (ADC)
4th
Ranking in Web Application Firewall (WAF)
5th
Average Rating
7.4
Reviews Sentiment
6.8
Number of Reviews
50
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Application Delivery Controllers (ADC) category, the mindshare of HAProxy is 9.9%, down from 12.7% compared to the previous year. The mindshare of Microsoft Azure Application Gateway is 6.6%, down from 8.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Delivery Controllers (ADC) Market Share Distribution
ProductMarket Share (%)
HAProxy9.9%
Microsoft Azure Application Gateway6.6%
Other83.5%
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.
SS
Cloud Specialist at a tech services company with 10,001+ employees
Mutual TLS has secured our web services and now needs broader protocol support
The most valuable feature we have found in Microsoft Azure Application Gateway is mutual TLS. We find mutual TLS valuable because we can verify the client securely by setting up the trust certificate of the client, and also if we do it at the client side as well. This successfully develops mutual trust, ensuring that we know the client who is calling our service is a legitimate client. That is a very nice feature.Microsoft Azure Application Gateway has helped manage our traffic efficiently because we have many web services that we can put behind the same URL, and we can have different URLs with the same Application Gateway with a limited number of listeners. We can do host-based routing as well as URL-based routing or path-based routing. It supports both, so we can have even a single URL supporting many applications, or we can have different URLs for different applications respectively. We have both use cases.
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Top Industries

By visitors reading reviews
Computer Software Company
17%
Financial Services Firm
11%
Comms Service Provider
9%
Manufacturing Company
8%
Computer Software Company
15%
Financial Services Firm
10%
Manufacturing Company
8%
Government
8%
 

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 Business22
Midsize Enterprise6
Large Enterprise24
 

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-source product. HAProxy is also a good choice for someone looking for a stable ...
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's the difference between Azure Front Door and Application Gateway?
We found Azure Front Door to be easily scaled and very stable. The implementation is very fast and Microsoft provides excellent support. Azure Front Door can quickly detect abnormalities before the...
How does AWS WAF compare to Microsoft Azure Application Gateway?
Our organization ran comparison tests to determine whether Amazon’s Web Service Web Application Firewall or Microsoft Azure Application Gateway web application firewall software was the better fit ...
What do you like most about Microsoft Azure Application Gateway?
Application Gateway automatically redirects unwanted users and takes care of the security aspect. It also handles the performance side of things, which is why we use it.
 

Also Known As

HAProxy Community Edition, HAProxy Enterprise Edition, HAPEE
Azure Application Gateway, MS Azure Application Gateway
 

Overview

 

Sample Customers

Booking.com, GitHub, Reddit, StackOverflow, Tumblr, Vimeo, Yelp
Lilly, AccuWeather, AIRFRANCE, Honeywell
Find out what your peers are saying about HAProxy vs. Microsoft Azure Application Gateway and other solutions. Updated: January 2026.
879,899 professionals have used our research since 2012.