What is the best tool to scan your website and tell you what you should improve and secure your website? I know but I need more tools to do different tasks, any alternatives to Sucuri?
SiteLock is a pretty popular tool for scanning websites and protecting/notifying against/about malware, database injections and more. The only catch: to use it, your hosting provider must provide it to you. I think it's possible to install it on your own servers, but not sure. But if the hosting provider has that (sometimes there are special hosting plans with SiteLock), then just use it.
I found out that even some huge companies whose main focus isn't on malware protection, offer that - Symantec for example. Find out more
here.
Another pretty powerful tool is Acunetix. You can check it out
here.
To find alternatives to any online things, I'm always recommending Alternativeto site, there's a long list of Sucuri alternatives as well. You can check out other alternatives
here.