Nginx vs Apache
Compare Nginx and Apache web servers - performance, architecture, configuration, modules, and reverse proxy capabilities.
Overview
Nginx and Apache HTTP Server are the two dominant open-source web servers. Nginx uses an event-driven, asynchronous architecture optimized for high concurrency, while Apache uses a process/thread-based model with powerful per-directory configuration. Together they serve the majority of websites on the internet.
Feature Comparison
| Feature | Nginx | Apache |
|---|---|---|
| Architecture | Event-driven, async | Process/thread-based (MPMs) |
| Concurrency Model | Non-blocking I/O | prefork, worker, or event MPM |
| Static File Serving | Excellent | Good |
| Reverse Proxy | Built-in, primary use case | mod_proxy |
| Load Balancing | Built-in | mod_proxy_balancer |
| .htaccess Support | No | Yes |
| Config Style | Centralized (nginx.conf) | Centralized + distributed (.htaccess) |
| URL Rewriting | ngx_http_rewrite_module | mod_rewrite |
| SSL/TLS | Built-in | mod_ssl |
| HTTP/2 | Native support | mod_http2 |
| HTTP/3 (QUIC) | Supported | Experimental |
| WebSocket Proxy | Built-in | mod_proxy_wstunnel |
| CGI Support | FastCGI, uWSGI, SCGI | mod_cgi, mod_cgid, mod_fcgid |
| Dynamic Modules | Supported (limited) | Extensive module system |
| Memory Usage | Low (fixed workers) | Higher (per-connection) |
| OS Support | Linux, BSD, macOS, Windows | Linux, BSD, macOS, Windows |
| License | BSD-like | Apache License 2.0 |
Nginx Pros & Cons
Pros:
- Superior performance for static content and high concurrency
- Low, predictable memory usage
- Excellent reverse proxy and load balancer
- Simple, readable configuration syntax
- Handles thousands of concurrent connections efficiently
- Widely used as API gateway and SSL terminator
- Great for microservices architectures
Cons:
- No .htaccess equivalent (requires server restart for config changes)
- Dynamic module support is limited compared to Apache
- No built-in support for embedded scripting (e.g., mod_php)
- Requires FastCGI/proxy for dynamic content
- Advanced features locked behind Nginx Plus (commercial)
- Config changes require reload
Apache Pros & Cons
Pros:
- .htaccess allows per-directory configuration without server restart
- Extensive module ecosystem
- Embedded language processing (mod_php, mod_perl)
- Mature, well-documented, and widely understood
- Flexible MPM architecture
- Rich access control and authentication modules
- Strong community support
Cons:
- Higher memory usage under heavy load
- Slower for static file serving at scale
- .htaccess lookups add overhead per request
- Process-per-connection model scales less efficiently
- Configuration can become complex
- Prefork MPM is resource-intensive
When to Use Nginx
- High-traffic websites serving static content
- Reverse proxy in front of application servers
- Load balancing across backend services
- API gateways and SSL/TLS termination
- Microservices and containerized deployments
- CDN edge servers
- WebSocket proxy requirements
- Applications where memory efficiency matters
When to Use Apache
- Shared hosting environments (need .htaccess)
- Applications using mod_php or embedded interpreters
- Projects needing per-directory config overrides
- Legacy applications built around Apache modules
- Environments requiring complex access control rules
- Teams with deep Apache expertise
- CMS platforms like WordPress (traditional hosting)
Verdict
Choose Nginx for high-performance static serving, reverse proxying, load balancing, and modern web architectures. Its event-driven model excels at handling many concurrent connections with minimal resources.
Choose Apache when you need .htaccess support, embedded language processing, or extensive per-directory configuration flexibility, particularly in shared hosting environments.
A common pattern is using Nginx as a reverse proxy in front of Apache, combining Nginx’s performance for static content with Apache’s dynamic content handling.