The other day I was looking at potential alternatives to Incapsula. I've been using them for quite some time, but I've had plenty of issues with them over the years. On top of that, they pretty much charge an arm and a leg if you are hosting multiple websites.
Well, I may have found a decent alternative. It's called CloudBric! Here is what they are offering per their feature page:
Web Application Firewall:
Cloudbric blocks all kinds of web attacks accurately and quickly with the industry-leading logic based analysis detection technology, powered by Penta Security Systems.
Cloudbric mitigates and blocks DDoS attacks which attempt to exhaust resources and make websites inaccessible.
Besides detecting and blocking malicious traffic, Cloudbric also provides free SSL certificates that encrypt communication between all visitors and the web server.They also recently announced a console upgrade that allows cloud load balancing. One thing that I don't see that they offer though is CDN/Caching abilities. If that's not important to you then I think it's worth checking out.
The best part is that it is free for up to 4GB of bandwidth per month. Over that, and here are the prices:
If you are struggling with DDoS issues, but are constrained by budget, I certainly think CloudBric is worth looking into.