Analytics agency?
Find your next customer
in secondsInspect any GTM container, without access and qualify your customers
Build lead lists by identifying companies using specific marketing technologies
Server-Side Tagging: The Next Big Revenue Stream
While 99% of websites haven't implemented server-side tagging yet, early adopters are already capturing high-value clients.
Untapped Market
2,673,000+ websites are potential clients waiting for server-side implementation
Revenue Potential
€4.2B+ market opportunity in server-side implementation services
Trusted by Industry Leaders
Join 300+ data professionals who use Tagstack to streamline their GTM workflows
How Tagstack Works
Tagstack analyzes GTM implementations with complete privacy and security. Your scan data is never shared or used to populate our database.
1. You Request a Scan
Enter any website URL or GTM container ID. Tagstack only accesses publicly available GTM configuration files.
2. Secure Analysis
We fetch and analyze the public GTM JavaScript file, interpreting the container setup without accessing any private data.
3. Get Your Results
Receive detailed insights about the GTM implementation. Your scan results remain private and are never shared.
Privacy First
Your scans are private to you. We never share your GTM findings to other users.
Secure Analysis
We only analyze public GTM configurations. No private data is accessed or stored during the scanning process.
From scan to insights in seconds
Stop spending hours manually inspecting GTM setups. Our automated scanner gives you instant insights into any container.
1. Quick Scan
Enter any domain or GTM container ID to instantly analyze the setup
2. Detailed Analysis
Get a complete breakdown of variables, triggers, and tags with smart detection of key integrations
3. Export & Action
Export findings, compare with best practices, or use for lead qualification
No credit card required
Find your next clients by technology usage
Discover companies using specific marketing technologies or identify those needing analytics consulting
Lead Generation
Find companies not yet using server-side tagging or proper consent management
Advanced Filtering
Combine technologies, exclude setups, and filter by site popularity
Export Capabilities PRO
Export complete domain lists for your outbound campaigns
No credit card required • Unlimited searches
Trusted by analytics professionals
See how companies use Tagstack to streamline their GTM workflows
"Amazing tool, fast development, quick answers to my questions. Thanks Lucas!"
David B.
Analytics Consultant at Data to Value
Let's keep in touch?
Despite being a one-man team, I have great ambitions for that project and I would love to count you in so if you want to join the ride... Stay tuned ! Promise we won't spam