I spend most of my time in a bubble of Google Analytics, Visual Website Optimizer, and Basecamp. But I'm building a side-project and I want to get some design inspiration from new & shiny apps that I might not have been exposed to. Which SaaS web apps that you use have the best user interfaces?
I really like Stripe (<a href="http://stripe.com" rel="nofollow">http://stripe.com</a>) and have always been a fan of Campaign Monitor (<a href="http://campaignmonitor.com" rel="nofollow">http://campaignmonitor.com</a>). We've been making lots of subtle design iterations to Mailgun (<a href="http://mailgun.com" rel="nofollow">http://mailgun.com</a>) recently too.<p>Also I'd recommend checking out LeanStack.io (<a href="http://leanstack.io" rel="nofollow">http://leanstack.io</a>) which has a great list of SaaS companies. You might find some inspiration there.
GitHub is usually pretty intuitive. Not a huge fan of their organizations layout though.<p>Basecamp probably has the best UI I've used for a SaaS project.
If you are looking for an Enterprise SaaS app -- you might want to check out Aha.io<p>We put a lot of thought into it and sourced the best design talent we could find. Originally, we were going to go with a totally flat design, but ended up with a hybrid approach. We found that a semi-flat design improved usability in our early tests with customers.