I’ve spent 21 years watching smart companies waste budget on tactics that don’t move revenue. Not because they lack data—but because no one ties it to P&L. That ends here.
— Christos Vasilopoulos, Founder
The through-line? We’ve always focused on one thing: connecting effort to revenue. The tools changed. The mission didn’t.
We began in 2005 as a web dev shop (Thorough Interactive)—but clients kept asking us to fix why their sites didn't convert.
So we evolved into ChannelDoubler (2007–2023): diagnosing channel waste before optimizing tactics, doing digital marketing and consulting, plus creating elearning systems for the same services.
Today, as Groowise, we've integrated the missing piece: team execution. Because even a perfect strategy fails if leaders avoid hard conversations. Our "holy" triad (strategy/diagnostics, digital marketing, coaching) completes our way of acting.
Typical Agency
Optimizes for clicks/conversions.
Groowise
Optimizes for P&L impact—we tie every tactic to your revenue model.
Typical Agency
Reports “engagement” metrics.
Groowise
Reports waste uncovered—e.g., “€28k saved by killing low-LTV channels”.
Typical Agency
Avoids hard truths to keep retainer.
Groowise
Truth-telling baked in—we’ll tell you when not to spend (even if it costs us fees).
Typical Agency
Hands off execution to juniors.
Groowise
Founder-led diagnostics—Christos personally audits your #1 bottleneck.
Diagnosing P&L leakage across marketing/tech/teams.
AIO-driven ad engines that optimize against your revenue model.
Fixing execution gaps that kill otherwise-perfect strategy.
Holistic eStrategy
Strategy For Leads & Sales
Social Media Marketing
Content Marketing
Email Marketing
Web Design and Development
Analytics and Reporting
Digital Transformation
Business Coaching
Google Ads
Search Engine Optimization
Holistic Support & Hosting
