Caddy is a powerful, extensible server platform that uses HTTPS by default.
Free, with optional paid features
Best Internet Information Services Alternatives ranked by AI · updated Aug 2026
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Internet Information Services is Microsoft's web server and application platform for Windows Server environments. It is aimed at organizations running ASP.NET, Windows authentication, and Microsoft-integrated workloads.
Developer: Microsoft
Price: Included with Windows Server licensing
🎯 microsoft.com/en-us/windows-server
Top 6 Internet Information Services alternatives
Nginx is a high-performance web server that can also be used as a reverse proxy, load balancer, and HTTP cache.
Free and commercial options available
lighttpd (pronounced 'lighty') is an open-source web server optimized for speed-critical environments while remaining standards-compliant, secure, and flexible.
Apache HTTP Server is a free and open-source web server software famous for its stability, security, and flexibility.
HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Open-source
LiteSpeed Web Server is a high-performance, commercial web server and reverse proxy for hosting websites, applications, and APIs. It is designed for...
Pros
- Apache-compatible configuration and .htaccess support ease migration from Apache
- Generally uses fewer CPU and memory resources than Apache under high concurrency
- Built-in HTTP/3, QUIC, caching, and security features reduce reliance on add-ons
Cons
- Commercial licensing costs more than free Nginx, Apache, or Caddy
- Smaller community and ecosystem than Apache or Nginx
- Some advanced features depend on proprietary licensing tiers
Free trial; paid licenses from $10/mo
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