EIG specializes in planning, design, and usability testing to help call centers around the world refine their IVRs and improve telephone customer service. EIG has helped improve speech and touch tone IVRs for more than 100 of the Fortune 500. .

EIG has conducted extensive research on telephone voice user interface design best practices. EIG research has resulted in a number of patents, both granted and pending. The company remains "vendor neutral" and does not sell IVR or speech recognition platforms.

The company is headquartered in San Ramon, California with international offices in the UK and Switzerland.