HAProxy vs Nginx
A detailed comparison to help you choose between HAProxy and Nginx.
Quick Verdict
4.5/5
HAProxy
0 reviews
4.2/5
Nginx
0 reviews
HAProxy is rated higher (4.5 vs 4.2). 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. Used by 30.2% of all websites whose web server is known (W3Techs, Oct 2026), second behind Cloudflare Server at 32.6%; still the most widely deployed self-hosted web server and reverse proxy.
HAProxy The reliable open source load balancer | Nginx Open source web server and load balancer | |
|---|---|---|
| Overview | ||
| Rating | 4.5 (0 reviews)✓ | 4.2 (0 reviews) |
| Pricing model | free | free |
| Starting price | Free | Free |
| Best for | Teams running their own infrastructure who want a proven, free, high-performance TCP/HTTP load balancer and are comfortable with configuration files | Every team running web applications that wants the industry-standard free reverse proxy and HTTP load balancer, with a paid Plus path when active health checks and support become necessary. |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ✓ | |
| Free tier | ||
| Tags | ||
| Tags | free tieropen sourceself hostable | free tieropen sourceself hostable |
| Visit HAProxy → | Visit Nginx → | |
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
Nginx
Pros
- + Free, BSD-licensed, and battle-tested across two decades of production use
- + Web server, reverse proxy, cache, and HTTP/TCP/UDP load balancer in one binary
- + 10,000+ concurrent connections at very low memory footprint
- + Modern protocol coverage: HTTP/2, gRPC, WebSockets, IPv6, ACME, experimental HTTP/3
- + Zero-downtime binary and configuration reloads
- + Enormous documentation and community knowledge base; every ops engineer knows it
Cons
- - Configuration file learning curve is steep and error feedback is terse
- - Active health checks, runtime config API, and fleet metrics are locked behind NGINX Plus
- - No SLA or vendor support for self-managed open-source installs
- - Project stewardship friction (freenginx and Angie forks) after F5 acquisition
- - HTTP/3 remains experimental in the open-source branch
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