Data-Driven Marketing, One Expert.
ONmetrics is a digital marketing consultancy founded and operated by Dave De Vries, based in London, Ontario. Since 2014, Dave has been immersed in every aspect of internet marketing — from technical SEO audits and Google Ads management to conversion-focused web design and advanced data attribution.
Unlike agencies where your account is passed between junior staff, at ONmetrics you work directly with a seasoned professional who understands how SEO, PPC, web design, and data visualization work together as one cohesive growth engine.
Meet Dave De Vries
Dave De Vries started his digital marketing career in 2014 with a simple conviction: marketing should be measurable, and every dollar spent should be accountable. Over the past decade, he's managed more than $50 million in advertising spend, completed over 200 marketing audits, and helped businesses across Southwestern Ontario transform their digital presence.
Frustrated by the gap between analytics tools and actionable revenue data, Dave built ONclix — a proprietary attribution platform that tracks the full customer journey from first click to final conversion. ONclix eliminates the guesswork that plagues most marketing operations by mapping every touchpoint to real revenue.
Dave's approach is rooted in technical depth. He doesn't just run campaigns — he engineers systems. From implementing server-side tracking and first-party data architectures to optimizing Core Web Vitals and building conversion-focused websites, every recommendation is backed by data and tested against measurable outcomes.
As a published author on Amazon and a recognized expert in marketing attribution, Dave brings a unique combination of strategic thinking and hands-on execution that larger agencies simply cannot match.
Proven Expertise, Real Results
10+ Years Experience
Hands-on internet marketing since 2014
Google Ads Certified
Certified Google Ads professional
ONclix Creator
Built proprietary attribution platform
Published Author
Published author on Amazon
$50M+ Ad Spend
Managed over $50 million in advertising
200+ Audits
Comprehensive marketing audits completed
Why One Expert Beats a Full Agency
No Handoffs
Your strategy, campaigns, and reporting are all managed by one person who sees the full picture.
No Junior Staff
You'll never find out your account was delegated to someone with six months of experience.
Unified Strategy
SEO, PPC, web design, and attribution work together — not as disconnected silos.
Serving Southwestern Ontario
Based in London, ONmetrics provides expert marketing consulting across the region — from St. Thomas to Stratford, Woodstock to Exeter.
View our full service area →Let's Talk About Your Marketing
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