All other things being equal, I know there's PhantomFrog and whatever that other one that's always hyping why they're better than everyone else in less-than-completely-forthright ways... but I'll go for Ray's stuff every time.

I've had extensive conversations with Ray about the theory behind both Throttlebox and Strongbox (and about security and bandwidth management in general), and it's really clear to me that he has a depth of understanding that pretty much runs circles around anyone else in the business.

When you look at the way that Strongbox and Throttlebox do what they do, the elegance with which they do it, the minimal-to-nonexistent server load the applications create, and the VERY reasonable pricing, with no ongoing fees, costs or charges, plus the really rapid response if you need help... it's hard to argue with that sort of commitment to your customer.

I'm sure that the other two are perfectly decent proejcts, but I seriously doubt they have the level of sophistication in their application AND the level of commitment to the customer that you'll find with Strongbox and Throttlebox.