Tracking & attribution audits
GA4, GTM, HubSpot, and ad platform diagnostics with visual attribution maps — the kind of deliverable that wins renewals.
For marketing & performance agencies
Your behind-the-scenes marketing data partner
You sell strategy and creative — but when GA4 doesn't match the ad platform and the client asks why, you're the one in the hot seat. MarStack is the marketing data partner that fixes tracking, delivers attribution audits, and gives you client-ready reports under your brand.
Featured client
Trusted by brands that reach millions
MarStack (LinkView, LLC) consulting helps power marketing data for companies operating at national scale — not just local shops with a broken GA4 install.
Cox Media Group
Over 50 huge brands
Marketing data pipelines & BigQuery analytics for one of America's largest media companies.
The data problems that erode client trust
Your clients hired you for results — but broken tracking makes every report a liability.
“The client's GA4 doesn't match our ad reports.”
You're defending numbers in QBRs instead of presenting strategy — and the client starts questioning your value.
“We don't have in-house GTM or HubSpot depth.”
Tracking fixes get deferred, outsourced to freelancers, or done wrong — and attribution stays broken for months.
“QBR prep takes days we don't have.”
Your team rebuilds slide decks from scratch every quarter instead of delivering insights that retain clients.
How we partner with your agency
We work behind the scenes — you keep the client relationship and the credit.
Win the pitch
We run AI search readiness audits and tracking audits on prospects and deliver attribution maps you can present in the first meeting — concrete proof of what's broken.
Fix the foundation
We implement GTM, GA4, HubSpot, and API integrations for your clients — properly, the first time.
Deliver under your brand
Client-ready attribution reports, stack documentation, and QBR materials with your agency name and logo.
Retain with ongoing data
Monthly reporting and tag health monitoring so your clients see continuous value — and stay on retainer.
What we handle for your clients
Deep technical work delivered as polished, branded deliverables your team can present with confidence.
Implementation & integration
Tag management, CRM mapping, API connections, and server-side tracking — done by practitioners, not passed to a junior.
AI readiness audit services for agencies
Score prospect and client sites with AI Readiness — our GEO (Generative Engine Optimization) audit for ChatGPT, Perplexity, Gemini, and Google AI Overviews — with evidence from their pages. Free self-serve audits plus branded expert reports for pitches and QBRs. Learn more →
Websites & landing pages
Conversion-ready sites with tracking baked in from launch. Your client gets a site that works; you get clean data from day one.
Partnership models that fit your agency
Whether you need us on one client or across your entire book of business, we scope around outcomes — not seat licenses.
Per-client projects
Fixed scope
audit, fix, or build
- Tracking audit for a prospect or new client
- GTM / GA4 / HubSpot implementation
- Website or landing page with tracking built in
- Branded deliverables under your agency name
Agency retainer
Monthly
dedicated data partner
- Ongoing tracking support across your client base
- QBR-ready attribution reports on schedule
- Priority implementation for new client onboardings
- White-label deliverables — your brand, our expertise
Free tools for your team
$0
always available
- AI Readiness Audit — score prospect sites for AI recommendation readiness
- Site Audit — marketing tech, tags, and performance scan
- Stack Manager — document client martech stacks
- Use in pitches before you engage us on implementation
Need a direct client referral? See how we work with businesses — many agency partners send clients our way for data-only engagements.
Agency FAQ
Do clients see the MarStack name?
No. Deliverables — audits, attribution maps, stack documentation, and reports — are branded with your agency name and logo. We work behind the scenes; you keep the client relationship.
What platforms do you implement?
Google Analytics 4, Google Tag Manager, HubSpot, Google Ads, Meta Ads, Looker Studio, Segment, Zapier, custom APIs, server-side tracking, and AI-powered analysis. If it touches marketing data, we've done it.
How is this different from hiring a freelancer?
Freelancers fix one tag and disappear. We deliver repeatable, branded processes — audit templates, attribution maps, QBR reports — that scale across your entire client base with consistent quality.
Who is a good fit?
Performance agencies, digital shops, and marketing consultants managing 5–30+ clients who need a reliable data partner — not another SaaS login their team won't use.
Be a data hero
Bring one client and your logo — we'll run a tracking audit and show you what a partnership looks like. Or start with a free AI Readiness Audit on any prospect.