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Find your next customer

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Inspect any GTM container, without access and qualify your customers

Build lead lists by identifying companies using specific marketing technologies

Lead Qualification Results
378
Variables
148
Tags
185
Triggers
GTM Server-Side Detected
Consent Mode Active
OneTrust CMP Integration
Market Opportunity Alert

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.

Websites Analyzed for Server-Side Implementation
2,700,000 websites
Only 1.0% have implemented server-side tagging 100%

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

Analytics Companies
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Enterprise

Join 300+ data professionals who use Tagstack to streamline their GTM workflows

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+2.7 million
GTM Containers Analyzed
500+
Active Users
15min
Avg. Time Saved per Scan
Private, live audits

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.

Streamlined Workflow

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

Start scanning for free

No credit card required

Technology Lookup Tool

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

Start searching for free

No credit card required • Unlimited searches

Customer Success Stories

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.

David B.

Analytics Consultant at Data to Value

Client Implementation Audits
300+
Happy Users
+2.7M
Containers Scanned
24h
Support Response

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

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