Not directly, but we are hoping to make our service more holistic in general.
Our SQLi and XSS modules in particular are quite a bit heavier than Nessus', but there are other features like page de-duplication that optimize speed as well.
A much more realistic option is Burp Suite, which is $299.
Burp Suite is great for anyone who knows what they're doing; for anyone that isn't already a security guy/gal the UI is near impossible to figure out, and the results aren't particularly actionable. That's much of what we try to fix.
Not trying to be argumentative, just clarifying! :)