Why leading brands are moving beyond tag managers and CDPs
Datafly Signal is not another tag manager. It’s not another CDP. It’s a first-party data platform that replaces both — with better performance, complete data, and total control.
Platform comparison
How Datafly Signal stacks up against Google Tag Manager Server-Side, Adobe, Tealium, mParticle, Snowplow, and Segment across the capabilities that matter most.
Browser footprint
Datafly Signal
GTM SS
80 KB+ (gtag.js required)
Adobe
100 KB+
Tealium
60 KB+ (utag.js)
mParticle
50 KB+
Snowplow
40 KB+
Segment
200 KB+
First-party setup
Datafly Signal
GTM SS
CNAME (detectable)
Adobe
CNAME (detectable)
Tealium
CNAME (detectable)
mParticle
CNAME (detectable)
Snowplow
Self-hosted
Segment
CNAME (detectable)
Attribution window
Datafly Signal
GTM SS
7 days (Safari)
Adobe
7 days (Safari)
Tealium
7 days (Safari)
mParticle
7 days (Safari)
Snowplow
Configurable
Segment
7 days (Safari)
Vendor identity
Datafly Signal
GTM SS
Requires vendor tags
Adobe
Requires vendor tags
Tealium
Requires vendor tags
mParticle
SDK-dependent
Snowplow
N/A
Segment
Requires vendor tags
Data governance
Datafly Signal
GTM SS
Limited
Adobe
Adobe rules
Tealium
AudienceStream
mParticle
Basic rules
Snowplow
Schema validation
Segment
Protocols
Infrastructure
Datafly Signal
GTM SS
Shared (Google Cloud)
Adobe
Shared (Adobe Cloud)
Tealium
Shared
mParticle
Shared
Snowplow
Self-hosted option
Segment
Shared (Twilio)
Deployment
Datafly Signal
GTM SS
Google Cloud only
Adobe
Adobe Cloud only
Tealium
Tealium Cloud only
mParticle
mParticle Cloud only
Snowplow
Self-hosted or BDP
Segment
Twilio Cloud only
Pricing
Datafly Signal
GTM SS
Free tier + cloud costs
Adobe
Per-profile licensing
Tealium
Per-event + connectors
mParticle
Per-event + connections
Snowplow
Self-hosted or per-event
Segment
Per-event + connections
Head-to-head comparisons
A closer look at how Datafly Signal compares to each platform on the specific limitations that affect your data, your performance, and your bottom line.
Google Tag Manager (Server-Side)
Google's server-side tag forwarding service
“GTM Server-Side still loads 80KB+ of gtag.js in the browser. Signal replaces it entirely.”
- Still requires client-side vendor JavaScript for identity
- Runs on shared Google Cloud infrastructure
- No built-in PII handling or consent enforcement
- No guaranteed delivery — if the request fails, the data is lost
Signal: Complete tag replacement with automatic vendor identity, not just server-side forwarding
Adobe Launch / Tags
Adobe's tag management system within Experience Platform
“Adobe ties your data infrastructure to their ecosystem. Signal gives you independence.”
- Heavy client-side SDK locked into Adobe licensing
- Per-profile pricing becomes very expensive at scale
- No server-side vendor identity generation
- Requires Adobe Experience Platform for full functionality
Signal: Platform-agnostic with simpler pricing — deploy anywhere, integrate with anything
Tealium iQ + EventStream
Tag management and customer data platform
“Tealium charges per connector. Signal includes every integration.”
- utag.js is 60KB+ before vendor extensions load
- Per-connector pricing means costs escalate with each destination
- Multi-tenant shared infrastructure
- Complex product suite with overlapping capabilities
Signal: All-inclusive pricing, single-tenant isolation, and a single platform instead of multiple overlapping products
mParticle
Customer data platform for mobile and web
“mParticle sits alongside your tags. Signal replaces them.”
- Supplementary to existing tags — does not eliminate client-side JavaScript
- Per-connection pricing grows with every new destination
- Identity resolution depends on their SDK running in the browser
- Multi-tenant infrastructure with limited deployment options
Signal: Replaces vendor tags entirely instead of adding another layer on top of them
Snowplow
Open-source behavioural data platform
“Snowplow gives you collection. Signal gives you the complete platform.”
- Significant engineering investment to deploy and maintain
- No vendor delivery — data goes to your warehouse, you build delivery yourself
- No vendor identity generation or managed delivery
- Limited managed service option with BDP
Signal: End-to-end platform from collection through governance to guaranteed vendor delivery — fully managed
Segment (Twilio)
Twilio's customer data platform
“analytics.js is 200KB+. Signal's collector is 4.2KB.”
- One of the largest client-side libraries in the industry at 200KB+
- Per-source and per-destination pricing adds up quickly
- Multi-tenant Twilio-managed infrastructure
- Post-Twilio acquisition — focus has shifted toward communications
Signal: 50x smaller collector, simpler all-inclusive pricing, and single-tenant infrastructure you control
Why Signal is different
The outcomes that matter to your business — not just technical architecture, but measurable results.
Faster pages, higher conversions
Remove 800KB+ of vendor scripts. Pages load measurably faster. Every second saved drives 3-5% more conversions.
Complete data, accurate ROAS
See the 20-40% of conversions that ad blockers currently hide. Campaign optimisation based on complete data, not a sample.
400-day customer recognition
Track the full customer journey across the entire buying cycle — not just the last 7 days before browsers reset identity.
Your data, your control
Single-tenant infrastructure means your data never touches anyone else's. Deploy in your cloud, your VPC, or let us host it. You own every byte.
Simple migration path
Migrating from your current tag management platform to Datafly Signal is straightforward. You can run both systems in parallel during the transition.
Set up your cluster
Deploy Datafly Signal in your environment using Helm charts or our managed service.
Configure vendor integrations
Add your vendor API credentials and configure which events each vendor should receive.
Add the collector
Add the 4.2 KB Datafly.js collector to your site — a single script tag.
Verify in the debugger
Use the real-time event debugger to confirm events are flowing correctly to each vendor.
Remove vendor tags
Remove vendor JavaScript tags from your site one by one as you verify each integration.
All data flows server-side
Your site is now free of vendor JavaScript. All data flows through your own infrastructure.
See how Signal compares with your current setup
Request a personalised demo. We'll show you exactly how Datafly Signal compares to your current platform — with your real data and integrations.