Save money and time by utilising Open Source
The main advantage Tellurian brings to a client is an extensive knowledge of open-source systems. Most problems faced in the IT industry have already been solved a number of times, elsewhere, first; without knowing what has already been produced, there's a risk of "reinventing the wheel".
By knowing what open-source products are available, and knowing how to tweak, configure or wrap them, Tellurian can solve apparently intractable problems, quickly.
If you're not familiar with the concepts behind open-source software and systems, some background reading is available, such as The Case for Open Source for Business and the Open Source Initiative for more information.