Sigma Digital


Sigma Digital: A synergistic alliance powering your conversion rate optimization and data analytics.

About Us

"Who We Are: Our Story and Mission"

e-CENS and Invesp have partnered to merge the best-in-class: providing comprehensive support for all your data analytics, customer data platform (CDP) implementations, customer engagement platforms, conversion rate optimization (CRO) strategy, experimentation, and AB test implementations. 

Sigma’s synergy enables businesses to succeed in the digital landscape — thanks to the combined expertise of e-CENS and Invesp.


"Meet the team"

Bashar Hafez

Co-Founder and MD e-CENS

Bashar is a seasoned global technology executive with nearly 20 years of experience leading software, product development, and analytics organizations at Fortune 500 companies, regional and global brands.

Sunil Attri

Director of Analytics e-CENS

Sunil has over 14 years of experience in analytics, customer insights, business intelligence, and conversion rate optimization in web and mobile for a range of industries, such as retail, healthcare, media, finance, transportation, and hospitality.

KhaliD Saleh

Co-Founder INVESP

Khalid Saleh is the CEO and co-founder of Invesp: one of the first North American companies to focus on experimentation and conversion rate optimization. Khalid also co-founded the revolutionary FigPii: empowering you to run AB testing, heatmaps, session replays, and online polling on your site with a single line of code.

Feras Alhlou

Co-Founder e-CENS

Feras Alhlou is the Chairman of e-CENS, renowned in the industry for his significant accomplishments, including being the #1 global reseller of Google Analytics Enterprise and earning the full-stack Google Marketing Platform reseller designation. Feras is the driving force behind leading agencies such as e-Nor, e-CENS, and Cardinal Path, demonstrating unparalleled leadership and vision in the digital analytics and marketing space.

Holger Temple

Partner and Europe Managing Partner

Holger is among the first Google Analytics partners worldwide since early 2005. Holger is considered one of the leading experts on digital analytics and is a renowned trainer who can simplify complex ideas into real-world practical examples with actionable insights.

Guillermo Vilarroig

Managing Partner for Spain

Guillermo began his digital career in 1996 working with Webtrends, Urchin, and Omniture, and was one of the first Google Analytics partners worldwide. With international experience. He was a co-founder of SEMPO Europe along with other top EU agencies.

Guillermo has great skills in complex and international B2B models, with more than 400 clients with an average of 3 projects per client and an ROI of over 90%.

Contact Us

"Get in Touch"

Are you interested in understanding how to grow your business? Talk to us about the Sigma path.