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
While 99% of websites haven't implemented server-side tagging yet, early adopters are already capturing high-value clients.
2,673,000+ websites are potential clients waiting for server-side implementation
€4.2B+ market opportunity in server-side implementation services
Join 300+ data professionals who use Tagstack to streamline their GTM workflows
Tagstack analyzes GTM implementations with complete privacy and security. Your scan data is never shared or used to populate our database.
Enter any website URL or GTM container ID. Tagstack only accesses publicly available GTM configuration files.
We fetch and analyze the public GTM JavaScript file, interpreting the container setup without accessing any private data.
Receive detailed insights about the GTM implementation. Your scan results remain private and are never shared.
Your scans are private to you. We never share your GTM findings to other users.
We only analyze public GTM configurations. No private data is accessed or stored during the scanning process.
Stop spending hours manually inspecting GTM setups. Our automated scanner gives you instant insights into any container.
Enter any domain or GTM container ID to instantly analyze the setup
Get a complete breakdown of variables, triggers, and tags with smart detection of key integrations
Export findings, compare with best practices, or use for lead qualification
No credit card required
Discover companies using specific marketing technologies or identify those needing analytics consulting
Find companies not yet using server-side tagging or proper consent management
Combine technologies, exclude setups, and filter by site popularity
Export complete domain lists for your outbound campaigns
No credit card required • Unlimited searches
See how companies use Tagstack to streamline their GTM workflows
"Amazing tool, fast development, quick answers to my questions. Thanks Lucas!"
Analytics Consultant at Data to Value
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