⚡ Load Balancers

Load balancers are software components or network devices that distribute incoming traffic across multiple backend servers, improving application availability, scalability, and fault tolerance by preventing any single server from becoming a bottleneck.

They typically support multiple load balancing algorithms, health checks that automatically remove unresponsive servers from rotation, SSL/TLS termination, caching, and traffic routing at different layers (L4 and L7).

Load balancers are used in high-traffic websites, cloud applications, microservices architectures, APIs, and multi-region deployments to ensure reliable service delivery, distribute workloads, and maintain consistent performance during traffic spikes or infrastructure failures.

According to our statistics, load balancers are detected on 6.4% of all websites.
93.6% of these sites use only one load balancer, 6.2% use two, and 0.2% use three or more of them.

Statistics based on 3.4M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading load balancers in 2026, based on market share.

The most popular is Varnish with an impressive share of 30.5%, followed by Google Cloud Load Balancer with 19.2% and AWS Elastic Load Balancer with 18.5%.

You can also drill down by country:

🚀 Country Highlights

Here is a list of load balancers that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

Google Cloud Load Balancer is #1 in the British Virgin Islands ^(-1)
AWS Elastic Load Balancer is #1 in Japan ^(-2)
F5 BIG-IP is #1 in Turkey ^(-3)
Apache Traffic Server is #1 in the Czech Republic ^(-11)
Application Request Routing is #2 in the Netherlands ^(-3)
Envoy is #2 in China ^(-4)
Sucuri CloudProxy is #3 in the United States ^(-4)
Azure Front Door is #5 in the United Kingdom ^(-3)

✨ Best Load Balancers

Below is a more detailed list of 18 load balancers we track, ranked by their market share.

Rank	Name	Market share
1	Varnish Stockholm, Sweden An open-source web application accelerator, also known as a caching HTTP reverse proxy. FreeOpen source$1,500+/year	30.5%
2	Google Cloud Load Balancer Mountain View, California, United States Distributes user traffic across virtual machine instances in the same region.	19.2%
3	AWS Elastic Load Balancer Seattle, Washington, United States Automatically distributes incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses. Free$$$	18.5%
4	F5 BIG-IP Seattle, Washington, United States An enterprise-grade application delivery controller and full reverse proxy platform for managing, securing, and optimizing web and API traffic. $3,200+/year	8.7%
5	Application Request Routing Redmond, Washington, United States A module for Internet Information Server that can load-balance between multiple servers in a server farm.	7.6%
6	Envoy San Francisco, California, United States A high-performance, open source edge and service proxy designed for cloud-native applications and large microservice "service mesh" architectures. FreeOpen source	6.1%
7	Sucuri CloudProxy Tempe, Arizona, United States A website application firewall that stops bad actors, speeds up load times, and increases website availability.	5.1%
8	Azure Front Door Redmond, Washington, United States A cloud content delivery network service that offers Layer 7 load-balancing capabilities. $35+/month	3.7%
9	Azure Application Gateway Redmond, Washington, United States A managed web traffic load balancer and full reverse proxy that enables scalable, highly available, and secure web application delivery on Azure. $0.0255+/hour	2.9%
10	Heroku Vegur San Francisco, California, United States Open-source proxy and load balancing software. FreeOpen source	1.1%
11	Ivanti vADC South Jordan, Utah, United States A software-based application delivery controller solution that delivers applications with predictable performance and strong multi-layered security and includes Virtual Traffic Manager, Services Director and Web Application Firewall. $$$	1%
12	Apache Traffic Server Wilmington, Delaware, United States A fast, scalable, and extensible web proxy cache that improves performance by caching frequently accessed information at the edge of the network. FreeOpen source	0.7%
13	HAProxy Newton, Massachusetts, United States A high-performance reverse proxy and load balancer for TCP- and HTTP-based applications. FreeOpen source$$$	0.6%
14	Barracuda Load Balancer ADC Campbell, California, United States A unified high-performance platform that helps organizations achieve their availability, acceleration, application control, and application security objectives. $7,000+/year	0.3%
15	NetScaler Fort Lauderdale, Florida, United States An application delivery and security platform that provides high-performance load balancing, application delivery, and security solutions. $11,000+/year	0.3%
16	Kong Gateway San Francisco, California, United States An API gateway that manages, secures, and routes API traffic using a cloud-native, platform-agnostic architecture. FreeOpen source$105+/month	0.2%
17	Squid Westminster, Colorado, United States A caching proxy for the web that supports HTTP, HTTPS, FTP, and more. FreeOpen source	0.1%
18	Oracle Traffic Director Austin, Texas, United States A high-throughput, low-latency layer-7 software load balancer for load balancing HTTP/S and TCP traffic to the application tier.	0.002%

👉 See Also

Load balancing

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,406,701 websites.
We currently track the presence of 18 load balancers across the web.
Statistics were last calculated on May 6, 2026.
For more details, see our methodology and disclaimer.