Cloudflare Zaraz vs Server-Side GTM vs Stape: Which Platform Is Right for You?

Three Approaches to Server-Side Tracking

The server-side tracking market has matured into three main platform options, each with a different architecture and trade-off profile.

Option 1: Cloudflare Zaraz

Cloudflare Zaraz is a server-side tag management tool built into Cloudflare's edge network. It runs at Cloudflare's edge nodes (not a dedicated server), meaning it runs geographically close to your users with very low latency. It manages all tracking through Cloudflare's dashboard rather than GTM.

Advantages:

• Extremely low latency — Cloudflare's global edge network is faster than a regional cloud server
• No server infrastructure to manage — Cloudflare handles all hosting and scaling
• Page speed improvement — Zaraz loads tracking tools after the page renders, not blocking the critical path
• Included in most Cloudflare Pro+ plans at no extra cost for basic use
• Easy setup for users already on Cloudflare

Limitations:

• Requires Cloudflare as your DNS/proxy provider — not useful if you are on a different CDN
• Smaller ecosystem of integrations compared to GTM — not all platforms have Zaraz clients
• Less granular control than GTM for complex tagging logic
• Data enrichment options are more limited

Best for: Cloudflare users who want fast setup, page speed improvements from lazy-loaded tracking, and do not need complex tagging logic.

Option 2: Self-Hosted Server-Side GTM (Cloud Run)

Deploy Google's open-source sGTM image on Google Cloud Run (or another cloud provider). You manage the infrastructure but use the familiar GTM interface for tag configuration.

Advantages:

• Maximum flexibility — full GTM ecosystem of clients and tags, community templates
• Deep data enrichment capability (Firestore lookups, custom API calls)
• Full control over data — no third-party SaaS in the middle
• Scale to any traffic volume
• Low hosting cost for most businesses (Cloud Run free tier covers modest traffic)

Limitations:

• Requires cloud infrastructure knowledge
• You are responsible for monitoring, updates (though largely automated), and availability
• Regional deployment (not edge) — slightly higher latency than Zaraz
• More complex initial setup

Best for: businesses wanting maximum control, data enrichment, and the full GTM ecosystem; teams with cloud infrastructure experience.

Option 3: Stape (Managed sGTM Hosting)

Stape hosts the sGTM server on your behalf, managing infrastructure, updates, monitoring, and custom domain setup. You get the GTM interface without managing cloud infrastructure.

Advantages:

• Full GTM ecosystem (same clients, tags, and templates as self-hosted)
• No infrastructure management required
• Additional features: routing rules, enhanced monitoring dashboards, Shopify integration
• Support included
• Fast setup (minutes rather than hours)

Limitations:

• Monthly cost ($20-60+/month) vs Cloud Run's near-zero hosting cost
• Stape as an intermediary in your data flow (data passes through their managed infrastructure)
• Slightly less control than self-hosted for unusual configurations

Best for: businesses that want sGTM's full capabilities without managing cloud infrastructure; agencies wanting easy multi-client management.

Feature Comparison

Summary

Zaraz wins on latency and simplicity for Cloudflare users. Self-hosted sGTM wins on cost and control. Stape wins on convenience with GTM-level capability. For most businesses new to server-side tracking with significant GA4 and Meta needs, Stape is the fastest path to production; for cost-conscious teams comfortable with cloud, self-hosted sGTM is the long-term choice.

See our Server-Side Tracking service for platform recommendation and implementation.

Not sure which platform is right for you? Contact Adslytics.