What a web server is (and why it matters)
A web server is the software that receives the request from the visitor's browser and returns the page, images and other files of the website. When the site is dynamic, such as WordPress or an online store, it also passes the request on to PHP (or another language) and delivers the result.
In other words, it sits in the middle of every visit to your website. That's why the way it handles many simultaneous connections, caching and PHP directly affects the speed, memory usage and stability of the server.
Important point
The web server is just one piece. If the bottleneck is in the database, the code or a heavy plugin, switching servers alone tends to bring little gain.
The architectural difference
The most important difference between the two is how each one serves visitors. An analogy helps:
One waiter per table
In the traditional mode (MPM prefork), each visitor takes up its own process. It works well with few tables. With a full restaurant, you need many waiters, and each one consumes memory.
A few very agile waiters
A small number of processes serves thousands of connections, switching between them while they wait. With a full dining room, memory usage tends to grow much less.
It's fair to say Apache has evolved. With MPM event and PHP running via PHP-FPM, it also handles idle connections well and uses less memory than in the prefork model. The difference shrinks considerably, although LiteSpeed was designed for this model from the start.
prefork
One process per connection. Highly compatible, but heavy under high load. Still common on older servers with mod_php.
worker
Uses threads within processes. Lighter than prefork, but requires PHP outside Apache (PHP-FPM).
event
An evolution of worker, optimized for keep-alive connections. It is today's recommended choice for a modern Apache.
Apache: advantages and limitations
The Apache HTTP Server is maintained by the Apache Software Foundation and is one of the most widely used web servers in the history of the internet. Because it is free, mature and thoroughly documented, it is still the default in many Linux distributions and hosting control panels.
✅ Advantages
- Free and open source, with no license cost
- Huge module ecosystem (security, proxy, authentication, rewriting)
- Native, full support for .htaccess
- Massive community: almost every problem already has a documented solution
- Very flexible for specific configurations
⚠️ Limitations
- With default settings or prefork, it uses more memory under load
- No built-in full page cache for WordPress
- Reading .htaccess on every request has a performance cost
- HTTP/3 is not natively supported; it usually relies on a proxy or CDN in front
- Requires technical tuning to deliver its best performance
LiteSpeed: advantages and limitations
LiteSpeed Web Server is developed by LiteSpeed Technologies. It was designed as a drop-in replacement for Apache: it reads the same configuration and the same .htaccess, but with an event-driven architecture and built-in caching features.
There are two main editions, and it's worth understanding the difference:
- LiteSpeed Enterprise: commercial and licensed. It is compatible with Apache configuration and applies .htaccess changes automatically. It is the most widely used in panels such as cPanel and DirectAdmin.
- OpenLiteSpeed: free and open source. It has the same performance core, but it doesn't read Apache configuration and only applies .htaccess changes after the server is restarted.
✅ Advantages
- Efficient architecture for many simultaneous connections
- LSCache in the server itself, with plugins for WordPress, WooCommerce, Magento and others
- LSAPI: optimized integration with PHP
- Native HTTP/3 (QUIC)
- Migration from Apache is usually simple with the Enterprise edition
- Built-in protection against excessive connections and brute-force attacks on WordPress
⚠️ Limitations
- The Enterprise edition has a license cost, which varies by plan
- Not every Apache module has an equivalent
- Smaller community, with less material for unusual cases
- OpenLiteSpeed requires extra care with .htaccess
- The gain from LSCache depends on the application having a compatible plugin or integration
About the benchmarks you find online
Many tests compare LiteSpeed with caching against Apache without caching and in prefork mode. The result is real, but it isn't a fair comparison. Before trusting a number, check whether both servers were configured with the same care.
Side-by-side comparison
| Criterion | Apache | LiteSpeed Enterprise | OpenLiteSpeed |
|---|---|---|---|
| Cost | Free | Paid license | Free |
| Architecture | Processes/threads (MPMs) | Event-driven | Event-driven |
| High concurrency | Good with event + PHP-FPM | Very good | Very good |
| Built-in page cache | No (depends on plugin, Varnish or CDN) | Yes (LSCache) | Yes (LSCache) |
| .htaccess support | Native and complete | Compatible, applied automatically | Partial, requires restart |
| HTTP/3 | Not native | Native | Native |
| Module ecosystem | Very broad | Good, but smaller | Smaller |
| Community and documentation | Huge | Good | Good |
| Best for | Projects that need specific modules or a budget without licenses | WordPress hosting, stores and many sites on one server | Self-managed VPSs with a technical team to configure everything |
General assessment. Real-world behavior depends on the version, hardware, application and, above all, configuration.
Practical configuration examples
1. The same .htaccess rule works on both
Common rules, such as forcing HTTPS and removing "www", work on Apache and LiteSpeed Enterprise without any changes. That's what makes migrating between them relatively simple.
# Force HTTPS and remove www
RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,R=301]
2. Modernizing Apache: MPM event + PHP-FPM
Many Apache servers still run prefork with mod_php, a heavy setup for high-traffic sites. On Ubuntu, moving to the modern model usually follows these steps (the PHP version may differ on your server):
sudo apt install php8.3-fpm -y
sudo a2dismod php8.3 mpm_prefork
sudo a2enmod mpm_event proxy_fcgi setenvif http2
sudo a2enconf php8.3-fpm
sudo apachectl configtest # validate before restarting
sudo systemctl restart apache2
StartServers 2 ServerLimit 16 ThreadsPerChild 25 MaxRequestWorkers 400 # ServerLimit × ThreadsPerChild MaxConnectionsPerChild 10000
These numbers aren't universal. Values that are too high can exhaust memory and bring the server down; values that are too low create a queue of visitors. The right tuning depends on available RAM and the actual consumption of each PHP process.
3. Page caching on LiteSpeed
On WordPress, the LiteSpeed Cache plugin configures caching automatically. In custom applications, you can enable the server cache directly in .htaccess, always excluding pages that must not be cached, such as the cart and the customer area:
CacheLookup on RewriteEngine On # Don't cache cart, checkout, logged-in area and POST RewriteCond %{REQUEST_URI} !^/(cart|checkout|my-account) [NC] RewriteCond %{HTTP_COOKIE} !logged_in [NC] RewriteCond %{REQUEST_METHOD} ^(GET|HEAD)$ RewriteRule .* - [E=Cache-Control:max-age=300]
A misconfigured cache is worse than no cache
If one customer's cart gets cached, another visitor may see their products. Always test exclusion rules in staging before publishing.
4. How to find out which server your site uses
In most cases, the response header itself reveals the server and whether the cache is working:
curl -sI https://www.yoursite.com | grep -iE "server|x-litespeed-cache|alt-svc" # Example responses: # server: Apache → Apache # server: LiteSpeed → LiteSpeed # x-litespeed-cache: hit → page served from cache # x-litespeed-cache: miss → page generated by PHP # alt-svc: h3=":443" → HTTP/3 available
If there's a CDN in front (such as Cloudflare), the server header may show the CDN's name instead of the origin server.
Real scenarios: which to choose?
📰 WordPress blog with traffic spikes
A news portal gets spikes when a story goes viral. Since most visitors see the same pages, caching solves almost everything. LiteSpeed with LSCache is usually a very efficient choice here. Apache with a cache plugin and a CDN also works well, but requires more pieces to configure.
🛒 Mid-sized WooCommerce store
Product pages can be cached, but the cart and checkout can't. LiteSpeed Cache has specific handling for WooCommerce, which simplifies configuration. Even so, checkout performance still depends on optimized PHP, database and plugins.
⚙️ Web system with specific modules
An internal application that depends on authentication via specific Apache modules, advanced reverse proxying or corporate integrations. Here, Apache's flexibility and ecosystem usually outweigh the performance gain.
🏢 Reseller or server with dozens of sites
When a single server hosts many sites on cPanel, LiteSpeed Enterprise's memory efficiency and compatibility with each client's .htaccess tend to offset the license cost. On small servers, the math may not work out.
🧱 Simple corporate site with little traffic
A few pages and a few hundred visits per day. In this case, both work well and the difference tends to be small for the visitor. What matters most is having SSL, updates, backups and basic caching.
Illustrative scenarios. The final recommendation should consider the application, the budget and who will handle maintenance.
Quick test: which one fits you?
Check the situations that describe your project. The result is an initial guideline, not a definitive recommendation.
The server matters, but management matters more
In practice, the choice between LiteSpeed and Apache usually weighs less than the quality of configuration and maintenance. A well-tuned Apache can outperform a poorly configured LiteSpeed. And a LiteSpeed with the wrong cache rules can even expose customer data.
That's why, for companies without a dedicated infrastructure team, it is usually worth relying on a company specialized in hosting and server management. WD Seven, for example, assesses the project's profile before recommending Apache or LiteSpeed, handles the migration with testing, tunes PHP, cache and database, and keeps monitoring the server once it goes into production.
Diagnosis before switching
Identifying whether the bottleneck is in the web server, PHP, database or code avoids paying for a license that wouldn't solve the problem.
Planned migration
Testing .htaccess rules, caching and modules in staging before changing the production server.
Continuous tuning
Process limits, PHP workers and cache rules reviewed as traffic grows.
Security and updates
Web server and PHP security patches applied with oversight, with no surprises.
Undecided between LiteSpeed and Apache?
With Cloud & DevOps and Maintenance & Support, WD Seven assesses your scenario and recommends the most suitable option.
Checklist before switching web servers
Measure current performance
Record TTFB, CPU and memory usage to compare later. Without measurement, there's no way to know if there was a gain.
List the modules and rules the site uses
Confirm they all have an equivalent on the target server.
Calculate the total cost
Include license, migration and maintenance, not just the monthly hosting fee.
Test in staging
Validate redirects, forms, login, cart and cache rules.
Decide who will follow up
Fine-tuning needs show up in the first days of real traffic. Someone needs to keep an eye on it.
Frequently asked questions
Not always. On dynamic sites with many simultaneous visitors, LiteSpeed usually has the edge, especially with LSCache. A well-configured Apache, with MPM event, PHP-FPM and caching, can perform very closely. The result depends on the application, the hardware and the configuration.
In most cases, yes, especially with LiteSpeed Enterprise, which reads .htaccess and understands most Apache rules. Even so, test first in staging, because specific modules may have no equivalent.
LiteSpeed Enterprise is paid. OpenLiteSpeed is free and open source, but it doesn't read Apache configuration and only applies .htaccess changes after the server is restarted.
LiteSpeed with the LiteSpeed Cache plugin is usually a very efficient combination that's simple to configure. Apache also performs well when combined with a good cache plugin, PHP-FPM and, if needed, a CDN.
Nginx is another popular, event-driven option, widely used as a reverse proxy and in modern applications. It doesn't read .htaccess, so migrating to it usually requires rewriting rules. It's a valid alternative, but it deserves its own comparison.
Conclusion
There is no absolute winner. LiteSpeed tends to be the best choice for WordPress sites, online stores and servers with many sites or traffic spikes, especially when the built-in cache is put to good use. Apache remains excellent when you need maximum compatibility, specific modules or want to avoid license costs, as long as it's configured in a modern way.
To decide, ask three questions: what type of site do I have, how much traffic do I get (and with what spikes) and who will look after the server. If the answer to the last one is "nobody", that's the first thing to fix, with either of the two.
LiteSpeed
Efficient under high concurrency, with built-in cache.
Apache
Free, flexible and with a huge ecosystem.
Configuration
Matters as much as the choice of software.
Management
Experts ensure results day to day.
