GrayBits is a full stack Ruby on Rails development consultancy dedicated to building user-friendly backend interfaces and implementing designs with accuracy. We love Rails but don't shy away from a fun project on another platform, so just tell us what you want to build!

Branimir (Brana) Vasilic
Founder and President

Brana has a Ph.D. in Physics and a few decades of experience programming in various languages. He's been doing Rails development since 2008 and has a passion for good design and usability.

Sarah Guck

Sarah joined GrayBits in 2013 and, apart from her talent for programming, brings her artistic sensibility and attention to detail to our work.


is a content management engine that is the basis for most of our websites. While fully-featured right out of the box, the engine also provides a framework for building interfaces tailored to the unique needs of each client.


is an e-commerce engine integrated into GrayMatter. E-commerce sites often require customized store, cart and checkout behavior, and GreenMatter gives us the capability to produce results that accurately reflect the design and functionality our clients need.


Rasters is our project management tool. Built with simplicity and ease of use in mind it helps us keep our projects organized.