Overlapping but distinct
Load balancers and reverse proxies are often confused because their roles overlap: both sit in front of your application servers and handle incoming requests. The difference is one of emphasis. A load balancer's primary job is distributing traffic across multiple servers for capacity and resilience, while a reverse proxy focuses on receiving requests and forwarding them to backends, often adding features like routing and TLS. In practice they frequently work together rather than being either-or choices.
Routing layers
Both can route requests, but with different emphasis. A reverse proxy commonly does host-based and path-based routing, directing requests to different backends based on the hostname or URL, which is useful for serving multiple apps or services behind one entry point. A load balancer distributes requests across equivalent servers, often with awareness of their load. Understanding that routing can happen at these layers helps you see how a proxy and a load balancer can each handle part of directing traffic sensibly.
Health checks
A key capability, especially of load balancers, is health checks: regularly testing whether each backend server is healthy, and routing traffic only to those that are. This is what lets a system automatically stop sending requests to a failed server, improving resilience. Reverse proxies can also check backends. Health checking is central to keeping traffic flowing to working servers, so whichever component performs it, it is essential to a reliable setup that survives individual server failures.
TLS termination
Both load balancers and reverse proxies commonly handle TLS termination, decrypting incoming encrypted (HTTPS) traffic at the edge so backends can work with plain requests, and managing certificates in one place. Centralizing TLS termination simplifies certificate management and offloads encryption work from application servers. This is one of the most common reasons to put a proxy or load balancer in front of an application, and either component can own this responsibility depending on your architecture.
When they complement each other
Consider an architecture example: a managed load balancer from a cloud provider distributes traffic across instances and handles health checks and TLS, while an Nginx or Caddy reverse proxy on each instance does fine-grained host and path routing to local services. Here they complement each other, the load balancer for scale and resilience, the proxy for flexible routing. Deciding operational ownership, what each layer handles, clarifies the design rather than forcing one tool to do everything.
The bottom line
A load balancer focuses on distributing traffic across servers for capacity and resilience, while a reverse proxy focuses on receiving and routing requests, with both often handling health checks and TLS termination. They overlap but complement each other: a managed load balancer can front instances while a reverse proxy handles routing on each. Understanding the distinction helps you design a clear, resilient traffic layer.
Related on Skillo
See also: What is a load balancer? Explained, What is a reverse proxy? Explained.
Sources
Published date reflects the original event date (2026-10-23). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.
Leave a Reply