AWS Application Load Balancer vs Envoy Proxy
A detailed comparison to help you choose between AWS Application Load Balancer and Envoy Proxy.
Quick Verdict
4.0/5
AWS Application Load Balancer
0 reviews
4.2/5
Envoy Proxy
0 reviews
Envoy Proxy is rated higher (4.2 vs 4.0). AWS ALB provides Layer 7 load balancing with host and path-based routing, content-based routing, WebSocket support, and gRPC support. Integrates with ECS, EKS, and Lambda. 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.
 AWS Application Load Balancer Layer 7 load balancer with path-based routing | Envoy Proxy Cloud-native proxy and service mesh sidecar | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (0 reviews) | 4.2 (0 reviews)✓ |
| Pricing model | usage-based | free |
| Starting price | From $0.0225/mo | Free✓ |
| Best for | AWS teams running microservices or containers who need Layer 7 routing with WAF integration and a contractual 99.99% Multi-AZ uptime commitment | 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. |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ✓ | |
| Free tier | ||
| Data-center locations | ||
| Regions | 39 AWS regions / 124 AZs across NA, SA, EU, ME, AF, APAC, ANZ | — |
| Tags | ||
| Tags | api accessus datacentereu datacenterapac datacenter | free tieropen source |
| Visit AWS Application Load Balancer → | Visit Envoy Proxy → | |
AWS Application Load Balancer
Pros
- + Content-based routing (host, path, header, method) with HTTP/2, gRPC and WebSocket support
- + 99.99% Multi-AZ SLA with explicit 10/30/100% service credits — the strongest published in this category
- + Native IPv6, AWS WAF at the listener, Shield Standard DDoS protection at no extra charge
- + Deep ECS/EKS/Lambda/Auto Scaling integration with no glue code
Cons
- - LCU metering is hard to forecast — bills can double when traffic dimensions shift
- - An idle ALB still bills about $16.42/month before any traffic or data transfer charges
- - Requires AWS-specific knowledge (VPC, target groups, security groups, WAF rule groups)
- - Routing configuration does not port to other clouds — real vendor lock-in
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
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