

HAProxy and Microsoft Azure Application Gateway are competitors in load balancing. HAProxy has the upper hand in flexibility and protocol-level balancing, while Azure Application Gateway excels in cloud integration and security features like WAF.
Features: HAProxy offers high customizability with various load balancing algorithms, VRRP for high availability, and efficient SSL termination. Microsoft Azure Application Gateway provides seamless integration with Azure services, automatic scaling, and a robust WAF for enhanced security.
Room for Improvement: HAProxy can enhance its GUI, documentation, and dynamic configuration capabilities. Microsoft Azure Application Gateway could improve in protocol support, logging, and broader protocol integration flexibility.
Ease of Deployment and Customer Service: HAProxy is flexible for on-premises and hybrid deployment, with strong community support and available enterprise support. Microsoft Azure Application Gateway simplifies cloud deployment and offers reliable, responsive Azure support, especially beneficial for Azure-centric enterprises.
Pricing and ROI: HAProxy, being open-source, offers high ROI with no licensing fees, suitable for companies with HAProxy expertise. Microsoft Azure Application Gateway may have higher costs but is cost-effective for Azure users, providing justified investment through its Azure service integration.
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.
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%.
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.
Microsoft Azure Application Gateway significantly impacts our cost savings while maintaining higher performance.
If we can use a shared resource, then the return on investment is really nice.
We have seen a return on investment in terms of time-saving and cost-saving by not creating our own infrastructure.
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.
My interactions with HAProxy's customer support were limited, but the feedback from my team indicated satisfactory service.
I would say they provide the best support for Application Gateway because they own the product, so their support is top-notch.
There is room for improvement, specifically in paid support, by providing more direct contact.
I would rate Microsoft support as good because they have a very skilled technical support team in the background
We manage an automatic load balancing feature where we add HAProxy servers dynamically behind the application load balancer to handle more traffic.
HAProxy's scalability is excellent; as our traffic expands, it handles load increases effortlessly.
For scalability, HAProxy meets my needs, supporting our initial horizontal scaling and then adapting to vertical scaling in a VMware environment.
Microsoft Azure Application Gateway is a very scalable product.
It has the autoscaling feature, so there is not much concern around performance; it can scale significantly.
Microsoft Azure Application Gateway is a scalable solution.
This reliability serves as a key reason for our choice, providing us with confidence even when faced with heavy traffic.
The hot reload feature of HAProxy also really helped us so that we never had to shut it down to reload it.
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.
We have been using it for the past two to three years, and there have been good results with no problems so far.
The stability is good, and except for a few instances, I don't see the non-availability of Azure Cloud 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.
An easier desktop interface to connect to a remote server and make changes on my PC would be beneficial.
The reloading functionality is effective as it allows soft reloads without interrupting traffic patterns.
One feature I mentioned is the support for non-HTTPS protocols such as TCP, which could allow one endpoint for all kinds of protocols.
There is room for improvement in terms of support, such as assigning agents directly for more straightforward engagement.
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.
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.
Setting up HAProxy didn't cost anything for me.
The pricing remains competitive compared to other vendors.
We would prefer to have it cheaper, but it is still expensive.
Azure solutions are quite expensive.
When it comes to pricing for Microsoft Azure Application Gateway, I would rate it a seven out of ten.
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.
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.
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.
We are using it for some of the security features for our applications, particularly for securing traffic in transit with SSL.
The Web Application Firewall (WAF) in Microsoft Azure Application Gateway has been very effective in protecting applications from security threats.
The gateway's Web Application Firewall feature enhances security as it is the first entry point to your network from the outside world.
| Product | Market Share (%) |
|---|---|
| HAProxy | 9.9% |
| Microsoft Azure Application Gateway | 6.6% |
| Other | 83.5% |

| Company Size | Count |
|---|---|
| Small Business | 17 |
| Midsize Enterprise | 15 |
| Large Enterprise | 16 |
| Company Size | Count |
|---|---|
| Small Business | 22 |
| Midsize Enterprise | 6 |
| Large Enterprise | 24 |
HAProxy is considered by many in the industry to be one of the fastest and most popular and trusted software load balancer products in the marketplace today. Organizations are able to immediately deploy HAProxy solutions to enable websites and applications to optimize performance, security, and observability. HAProxy solutions are available to scale to any environment.
HAProxy is an open-source product and has a robust, active, reliable community. The solutions are continually tested and improved on by the community. HAProxy offers a dynamic design to support the most modern architectures, microservices, and deployment environments (appliances, containers, virtual, and cloud).
HAProxy utilizes a cloud-native protocol, which makes it a complete solution for cloud services such as Red Hat OpenShift, OVH, Rackspace, Digital Ocean, Amazon Web Services (AWS), and more. It also can be used as the reference load balancer in OpenStack.
HAProxy Products
Reviews from Real Users
“Having the right load balancing solution – which is what HAProxy is – and protection in place gives organizations peace of mind.” - Nathanel S., Platform Architect at SES
“I use HAProxy for individuals who can not buy low balancers. I built NFV in a box and send individuals a pathway into an HAProxy VM. The setup was not difficult; it usually takes a day to complete for a VPC. When it comes to pricing, HAProxy is free.” - Nasir O., Network & Cloud Architect at Koala Compute Inc.
Azure Application Gateway is a web traffic load balancer that enables you to manage traffic to your web applications. Traditional load balancers operate at the transport layer (OSI layer 4 - TCP and UDP) and route traffic based on source IP address and port, to a destination IP address and port.
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