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    • Overview

      We maximize leads, increase sign-ups, and boost sales across all possible mobile channels.

    • Method

      We drive acquisition, success rates, and ROI, enabling deeper connnections with your brand.

    • Mobile Operators

      Compelling, cross-channel user journeys that defy expectations and increase revenue.

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      Meet the team behind next-gen digital engagement and acquisitions.

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      Check our latest news and insights.

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      Join the forward-thinking team at the heart of mobile engagement.

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      We’re here to answer any questions you might have about Upstream.

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    We’re taking mobile engagement further

    For over two decades, we’ve been innovating new and exciting ways of boosting mobile engagement and acquisitions for our ambitious customers across the world.

    Our Story

    Built to surpass

    Many companies in our industry are come and go—they stake their claim on the digital frontier when their strategy is relevant and then disappear. The good ones are built to last, and are leading the way in digital marketing campaigns and customer desires at any given time. We reinvent the market and ourselves, surpassing what is standard.

    Our people are some of the best in their field—agile, innovative, full of fresh ideas, and thriving within an ever-changing tech environment. Our platform delivers foolproof, targeted, automated campaigns that drive hyper-focused results with authentic outcomes. No fraud. No number pumping. Just real customers, sign-ups, and sales. Our customers find we’re the only thing ever needed to go further.

    Our numbers

    Far reaching customer engagement
    1.2 bn
    Consumer Reach

    Our global influence is uncompromisingly expansive.

    370 +
    Advertisers

    We are a truly global company with hundreds of advertisers.

    3.1 bn
    Monthly Interactions

    We connect with users cross-platform for maximum reach.

    4000
    Ad Experiences

    Our expert mobile marketing team repeats success.

    Leadership Team

    Meet the folks making digital that much more daring every day

      Salim Khoury Executive Chairman Read Bio

      Bringing over 35 years of experience in scaling businesses across emerging markets, with a focus on telecom and digital transformation.

      Dimitris Maniatis Chief Executive Officer Read Bio

      Leading Upstream’s mobile-first platform relaunch. Joined as Head of Secure-D. Founder of “all things web” digital agency, now part of IPG, and a head figure in digital media & advertising in Greece.

      Natalia Mila Chief Technology Officer Read Bio

      Leading Upstream’s technical product, engineering and infrastructure functions. Has worked within Upstream as Software Engineer, Chief Architect and Head of Engineering.

      George Serfiotis Chief Financial Officer Read Bio

      The Finance, Business Planning, Legal and HR departments fall under his supervision. Joined as Head of Financial Planning & Analysis.

      2025
      2020
      2018
      2017
      2014
      2008
      2006
      2001

      2025

      A bold new chapter

      Stepping into a dynamic new era, we are proud to join the Intersel family. Together, we are uniting our strengths to elevate our technology, pioneer new frontiers in AI-driven innovation, and deliver deeply impactful customer journeys worldwide.

      2020

      We grow, you grow

      During the time of “all digital”, and while driving growth for even more companies across industries -yes, we ‘ve expanded-, we relaunch our reinforced “grow” technology platform crafting seamless, mobile-first user journeys for even higher results.

      2018

      Technology building blocks

      We consolidate our platform and build unique features like our built-in anti-fraud solution or our zero-rated, ad-funded mobile internet portal.

      2017

      More extroversion

      We expand our ecosystem with co-operations and partnerships for delivering leading content and experiences from gaming to lifestyle.

      2014

      An investing vote

      Actis, the leading global emerging market investor,with US$10bn assets under management, makes a significant investment in Upstream, affirming our business model, technology, people, partner portfolio and unmatched track record of customer engagement and conversion. The same year we set base in Kuala Lumpur.

      2008

      The world is ours

      The world is our oyster. 2008 marks our entry to a new exciting chapter turning our sights to the promising land of high growth markets. We open our office in Rio, Brazil, along with operations in Africa.

      2006

      The mobile operator era

      The Mobile Operator era. Upstream starts working with mobile operators in Europe, in Greece, Italy, Spain and Portugal, marking the start of a 15 year path that has created our unique mobile-first know-how.

      2001

      The beginning

      Marco Veremis and Alex Vratskides are a company of four founding Upstream in downtown Athens as a media serving platform. This is where the story begins.

    Culture & Careers

    Life & Work at Upstream

    We like to turn things on their heads, be out-front, change course, and make mistakes if it means becoming better. This is what makes us great. Upstream is a place of growth and acceleration — where we all strive to be the best versions of ourselves.

    Join us

    Responsibility

    Engaging for good

    We take our impact seriously. Through running events and fundraising campaigns, we stay true to our commitment for quality across all marketing campaigns, leaving the world a better place.

    In the media

    Upstream President, Marco Veremis, at BBC News
    Read more
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    Awards

    Working at the forefront of customer engagement

    Upstream increases new customers and keeps them engaged unlike any other digital strategy service. Take advantage of our proven formula for growth and grow with us.

    Join us

    Leading in mobile marketing

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