About
A digital authority partner for service businesses
Six6 began in optometry marketing, one of the most trust-driven corners of healthcare. Today we bring that same discipline to service businesses that need to be found, trusted, and chosen — by people, and by the AI systems people now ask.
Where Six6 comes from
Six6 was built in optometry marketing — an industry where nobody books an eye exam with a practice they do not trust. Earning patient enquiries for independent practices taught us that visibility without trust produces traffic, not clients.
That lesson now shapes everything we build: websites that read clearly to people and to AI systems, proof that holds up to scrutiny, and lead journeys a business can actually measure.
What we believe
The businesses that win the AI era will be the ones that are easiest to understand, easiest to verify, and easiest to choose. Our job is to make your business all three — across Google, AI search, paid media, and your own website.
We do not guarantee rankings or revenue, and we do not inflate results. We build systems, measure them honestly, and improve them.
Who you will work with
The people behind Six6
Six6 was founded in 2023 by two people with deliberately different strengths: one builds the intelligent systems, the other has stood on the client's side of the counter for 17 years.
Justin Underhill
Co-Founder & Head of AI & Digital
Justin leads Six6's technology: the intelligent websites, AI layers, and measurement systems behind every engagement. An AI engineer and full-stack developer, his digital career runs back to 2010 — from WordPress engineering through agency digital leadership to shipping production AI products end-to-end.
He holds Anthropic certifications across the Claude platform and Claude Code, and builds the audit, tracking, and AI-search systems Six6 deploys for clients.
Marvin Westfall
Co-Founder & Strategy Director
Marvin spent 17 years inside the optometry industry at Specsavers — from the practice floor to Head Office, where he protected brand consistency across franchise practices as an area manager before moving into regional marketing.
That insider's view of how service businesses actually run shapes Six6's client strategy: AEO and digital marketing built around how patients and customers really choose. He is Google-certified and leads strategy across Six6's health, beauty, and service-business clients.
Start with a conversation that already knows your context
The fastest way to work with us is the AI Visibility Audit — it gives both sides a structured starting point. Or WhatsApp Marvin directly — he fields every new enquiry.
Start with a clearer view of your digital authority
The AI Visibility Audit gives Six6 useful context and gives you a practical starting point.