* Shade of blue in logo (nice) and blue stripe do not match. Bluish color of links in main navigation is yet another shade of blue, perceptually.
* Your logo is, judging from favicon, round thing on a black square - black square is completely lost when put on top of a black stripe at the top of the page.
* I really like your suggestions in prices table: 'Ideal for 2000+ transactions', 'Ideal for 3000+ transactions' Prospective client will do her math by herself, three times, but this gives a feeling of prices being thought out well and optimised not only from your perspective, but from client perspective, too.
* I like your plans names ('Start Up', 'Growth', 'Scale Up'). How about makeing them a bit more dynamic: 'Starting Up', 'Growing', 'Scaling Up'?
* 'Special pricing with Samurai: 15¢ per txn. No minimums.' txn - reverse engineer. Also, could be clickable - link should explain offer in full detail.
* Overall feel is a bit static and 'this-is-theme-based-design'.
* Back to colors. Green dashed lines in price table and green button (against all sorts of blue). Overall feeling is rather sad, grey.
* 'Frequently Asked Questions?' on pricing page - skip the question mark. Its not even a FAQ.
* Line spacing in FAQ is way to big (and font way too small). Also, fonts do not fit in. It almost feels like my browser didnt pick up some stylesheets.
* page: http://www.chargebee.com/features.html even more 'shades of blue' (inside box on the left); Also, first header starts on blue stripe - major div/CSS problems here.
* http://www.chargebee.com/faq.html font selection, font sizes, line spacing!
* Lots of work on copy, in my opinion. Example: 'Here we are building ChargeBee, earning your trust & business one transaction at a time.' Earning my business?
* Found video on /howitworks - well.. machine voice in video is unacceptable.
* Your blog is on some other platform (and its not good, design wise) - it should be part of your 'company website', design wise, url wise and what not.
* Overall, this is your frontend to the world and it must look, read and feel better. Dont underestimate it.
Me thinks.