Outseta has a massive suite of tools. It's got a CRM, an email system for subscribers, authentication, payments, a support desk system, and more.

It's expensive, as a result, but I'm impressed with how much they offer.

Of course, as it goes with suites like this, you'll get much more flexibility for cheaper if you tack a few tools together.

But, that said, if you're open to the cost and don't want to use multiple tools, then it's worth looking at Outseta.

I don't like it - mainly because I like flexibility, Outseta doesn't have a free plan, and it's rare I'm going to need everything it offers.

Outseta isn't the best at anything, but it offers a whole lot. If you need a whole lot for a big project, check it out.