liraz

Not true. If you cut down the number of preforked processes and use spamd spamassassin works just fine in a VPS with limited memory.

Also, SA leverages blacklist services (and other techniques, it's very configurable) and is easier to integrate into your mail server.

Proprietary vs free software isn't just about money. It's about freedom, control and security.

I've often found myself needing to patch the software I use to get it to work just right. Even when a proprietary software vendor gives you source code the build system often sucks and the code is not hacker friendly.

Also the licensing would restrict you from doing all sorts of things you wouldn't have to think twice about with an open source web server (e.g., auto-scaling in a cloud configuration)

Unless you need the backwards compatibility with Apache don't use LiteSpeed. There are excellent open source alternatives which are just as good and perhaps superior. Minus the Apache compatibility.

+1 for lighttpd. nginx is nice too but its configuration system is much more primitive by comparison.

For now everything is free but at some point we'll probably be adding premium services in an open source friendly freemium model that ensures we have the resources to sustain TurnKey and keep the project healthy.