# What is LiteSpeed?

## The fastest Web Server on Earth

### Unbeatable Performance, Drop-In Compatibility, Cutting-Edge Features, Enormous Scalability

### Shared Hosting

Shared hosting providers offering LiteSpeed report significant reductions in server load, which translates into improved performance and reliability for each client hosted on the server.### Speed

Cutting-edge features make LiteSpeed-powered websites significantly faster than the competition. Traffic spikes are handled with minimal performance impact.### Security

LiteSpeed takes security very seriously and provides site administrators with the most powerful, state-of-the-art security features available to keep client sites safe and secure.### Premium WordPress Hosting

LSCache for WordPress uses advanced cache management tools and optimization features to create an unmatched user experience.Server-level full-page cache gives LSCache a level of accuracy and intelligence that other application-level plugins cannot duplicateThe crawler pre-caches your customer's websites so that they load quickly on the first visit.LSCache offers premium optimization features for faster page loads and improved results on page speed measurement websites such as PageSpeed Insights and GTMetrix.E-commerce websites can be fully cached under LSCache, including shopping carts and other personalized content.### Super Fast

**Powerful LSCache for dynamic content**   
 PHP LSAPI is faster than PHP/FPM. Static files - 4X-6X faster than Apache. LSCache - 100x faster game changer   
  
 **Handle tons of concurrent users**   
 Event driven architecture like nginx. No quick drop over 100-200 concurrent users.   
  
 **Triple your server capacity, reduce hardware and support costs**### Secure

 **Smarter and Faster WAF**   
 Compatible with Apache mod_security rules. Uses many fewer server resources. 

 **WordPress Brute-Force Protection**   
 Built-in brute-force protection at the server level, drops malicious connections once detected. It is much more efficient than any other plugin-level protection. 

 **Advanced Anti-DDoS**   
 Per-IP throttling at different levels: connection, request, and bandwidth. 

 **External Applications suEXEC**   
 Running as user for PHP/Ruby/CGI/FCGI/LSAPI etc. 

### Compatibility

 **Apache Interchangeable**   
 If your site runs on Apache, it runs on LiteSpeed. No need to change anything. LiteSpeed will read Apache configuration files directly. 

 **.htaccess Compatibility**   
 Efficient .htaccess implementation with no performance degradation. 

 **cPanel/WHM Integrated**   
 Supports EA4, Alt-PHP. Switch between Apache & LiteSpeed with one click. cPanel/WHM works exactly the same as with Apache. 

 **Compatible with CloudLinux**   
 Supports CloudLinux LVE/CageFS, PHP/Ruby/Python/Node.js Selectors. 

 

### Cutting Edge Technologies

**HTTP/3, QUIC, TLS/1.3**   
 LSWS provides the fastest HTTPS with cutting-edge support for QUIC and HTTP/3. 

**ESI (Edge Side Include) Cache**   
 Punch holes for private/changeable data on public pages using ESI. Together with LSCache, ESI lets you serve the entire mixed-content page from cache. 

**Brotli Compression**   
 Brotli compression (superior to gzip) available for both static and dynamic content. 

**TFO (TCP Fast OPEN)**   
 Speeds up TCP connections.

### Simple Stack

**Better than cPnginx**   
 No need for messy NGINX-Apache hybrid setups. Removes one layer of proxy, which means faster serving of dynamic content. 

**No more Varnish needed**   
 LSCache is faster and uses less CPU/memory compared to Varnish. No extra layer for HTTPS termination required. 

**No need to migrate to NGINX**   
 No need to deal with NGINX rewrites. Stop harassing your sys-admins. 

**No more wasting time tuning your Apache**   
 LiteSpeed has an event-driven architecture like NGINX. Apache is a multi-process, multi-threaded server, which cannot come close to the performance of an event-driven server, no matter how you tune it. 

### Detailed Info