Not all of the functionality of Sun Java System Web Server 7.0 has been open sourced as part of the Open Web Server project. The following table compares the features of Open Web Server (OWS) and Sun Java System Web Server (SJSWS).
| Feature | OWS | SJSWS |
|---|---|---|
| Multi-threaded server core | X | X |
| Server virtualization | X | X |
| HTTP 1.0/1.1 | X | X |
| On-the-fly response compression | X | X |
| Ordered Input/Output filters | X | X |
| sed Input/Output filters | X | X |
| SSL | X | X |
| Elliptic Curve Cryptography (ECC) | X | X |
| Administration GUI | X | |
| Administration CLI | X | |
| Administration CLI (start/stop/reconfig/restart) | X | X |
| Installer | X | |
| Native Monitoring | X | X |
| Simple Network Management Protocol (SNMP) | X | |
| High-performance file cache (NSFC) | X | X |
| CGI/FastCGI | X | X |
| SHTML | X | X |
| .htaccess files | X | X |
| Access Control Lists (ACL) | X | X |
| LDAP/LDAPS | X | X |
| Integrated HTTP Reverse Proxy | X | X |
| URL Redirection and Rewriting with Regular Expressions | X | X |
| Variables, Expressions and String Interpolation in Configuration Files | X | X |
| Support for Dynamic Java content (JSP/ Servlet/ JSF/ JSTL/ JNDI/ JDBC/ JWSDP) | X | |
| Lightweight Java Session Replication | X | |
| WebDAV | X | |
| Search | X | |
| NetBeans support | X | |
| Localization support (l10n and i18n) | X | X |
| NSAPI (native API) | X | X |