Envoy Proxy vs HAProxy
A detailed comparison to help you choose between Envoy Proxy and HAProxy.
Quick Verdict
4.2/5
Envoy Proxy
0 reviews
4.5/5
HAProxy
0 reviews
HAProxy is rated higher (4.5 vs 4.2). Envoy is an open source L7 proxy and service mesh foundation. Used as the data plane in Istio, AWS App Mesh, and Consul Connect. High performance, built for microservices and Kubernetes. HAProxy is a free, open source, high-performance TCP/HTTP load balancer. Handles 100,000+ concurrent connections. Used by Reddit, Tumblr, and AWS. Known for reliability over many years.
Envoy Proxy Cloud-native proxy and service mesh sidecar | HAProxy The reliable open source load balancer | |
|---|---|---|
| Overview | ||
| Rating | 4.2 (0 reviews) | 4.5 (0 reviews)✓ |
| Pricing model | free | free |
| Starting price | Free | Free |
| Best for | Platform engineering teams on Kubernetes standardising ingress, mesh and egress traffic management on one open data plane, with the in-house or vendor expertise to own a control plane. | Teams running their own infrastructure who want a proven, free, high-performance TCP/HTTP load balancer and are comfortable with configuration files |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tieropen source | free tieropen sourceself hostable |
| Visit Envoy Proxy → | Visit HAProxy → | |
Envoy Proxy
Pros
- + Free forever: Apache 2.0, no seats, no per-node licence, no usage metering
- + CNCF graduated with neutral governance and multi-vendor support options
- + xDS APIs are the de facto standard control-plane interface for service meshes and gateways
- + Depth of features: HTTP/3, gRPC-aware load balancing, circuit breaking, external auth, rate limiting, hot cert rotation
- + Documented support window (four minor versions patched) and a decade of production track record
- + Extensive observability hooks: stats, tracing headers, structured access logs
Cons
- - Configuration complexity is high; production-grade setups need a control plane or serious in-house expertise
- - No SLA or commercial support bundled — community support only
- - Sidecar overhead (latency and memory per proxy) is a real cost in large mesh deployments
- - C++ codebase narrows the pool of people who can debug core-level issues
- - Troubleshooting spans both Envoy docs and whatever control plane generates your config
HAProxy
Pros
- + Free and open source — no metering, no feature paywall
- + 25 years of production use at very large scale
- + Strong documented performance with lean memory use
- + Transparent LTS lifecycle with published end-of-life dates
- + Layer 4 and 7, HTTP/2 and HTTP/3, gRPC, Lua and a REST API
Cons
- - File-based configuration only — no GUI in the community edition
- - No support or SLA unless you buy HAProxy Enterprise
- - Advanced security (WAF, bot management) is an enterprise add-on or DIY
- - You bring the infrastructure — no managed service in the free tier
- - Linux-first; other platforms are second-class
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