Free Google Tag Manager alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

4 of the 5 Google Tag Manager alternatives we track can be used for free (free, open source, or with a free plan). Matomo, Cloudflare Zaraz and Segment rank highest, with facts last verified Nov 8, 2026.

Quick comparison

#	App	Pricing	Verified price	Open source	Platforms	Verified facts	Score
1	Matomo	Open source	—	Yes	Web, Self-hosted, iOS +1	5 of 5	69.4
2	Cloudflare Zaraz	Free plan + paid	—	No	Web	4 of 4	55.9
3	Segment	Free plan + paid	—	No	Web	4 of 4	51.2
4	RudderStack	Free plan + paid	Growth from $265 a month (1M events)	No	Web, Self-hosted	6 of 6	50.0

1. MatomoTop pick
Best for: Organisations that want GA-level depth with full data ownership
Open sourceSelf-hostableWeb, Self-hosted, iOS, Android
69.4
score / 100
Why switch from Google Tag Manager
Its built-in open-source Tag Manager can be self-hosted, keeping tag data off Google.
Pros
Free to self-host with full data ownership
No data sampling and unlimited retention
Very wide feature set, including ecommerce and funnels
Cons
Interface feels dated and crowded
Self-hosting large sites needs tuning
Heatmaps, recordings and other extras are paid plugins
Visit Matomo Details and reviews
How this score is calculated
Editorial fit ×0.352
Reviews ×0.363
Clicks (90 days) ×0.15100
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Matomo a good Google Tag Manager alternative?
Verified facts
5 of 5 verified
Data sampling
None
Checked Nov 8, 2026matomo.org(opens source in a new tab)
Cloud free trial
Yes, no credit card
Checked Nov 8, 2026matomo.org(opens source in a new tab)
Report data retention
Forever (Cloud)
Checked Nov 8, 2026matomo.org(opens source in a new tab)
Users
1 million organisations
Checked Nov 8, 2026matomo.org(opens source in a new tab)
License
GPL-3.0
Checked Nov 8, 2026github.com(opens source in a new tab)
2. Cloudflare Zaraz
Best for: Sites already on Cloudflare that want to cut browser-side tag scripts and handle consent in one place.
Free plan + paidWeb
55.9
score / 100
Why switch from Google Tag Manager
Loads analytics and ad tags from Cloudflare's edge instead of the browser, with built-in consent management and a free monthly allowance.
Pros
Runs many tools server-side, so fewer scripts load in the browser
One million events a month free on every Cloudflare account
Built-in consent management with IAB TCF support
Version history and preview mode for safe changes
Cons
Works best when the site is proxied through Cloudflare
Smaller library of native tool integrations than Google Tag Manager
Normal browser extensions can't see server-side tools, which makes debugging harder
Visit Cloudflare Zaraz Compare with Google Tag Manager Details and reviews
How this score is calculated
Editorial fit ×0.357
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Cloudflare Zaraz a good Google Tag Manager alternative?
Verified facts
4 of 4 verified
Free plan
1,000,000 events/month
Checked Nov 8, 2026developers.cloudflare.com(opens source in a new tab)
Paid usage
$5 per extra 1M events/month
Checked Nov 8, 2026developers.cloudflare.com(opens source in a new tab)
Consent management
Yes, built in
Checked Nov 8, 2026developers.cloudflare.com(opens source in a new tab)
Server-side loading
Yes
Checked Nov 8, 2026developers.cloudflare.com(opens source in a new tab)
3. Segment
Best for: Product and data teams who want one tracking layer feeding many analytics and marketing tools
Free plan + paidWeb
51.2
score / 100
Why switch from Google Tag Manager
Collect events once with one SDK and route them to analytics and ad tools, instead of managing a pile of tags in a container.
Pros
One integration feeds hundreds of destination tools
Widely adopted tracking spec that many tools understand
Profiles, audiences and data governance available in the same product
Cons
Costs rise quickly as monthly tracked users grow
Full CDP features (Unify, Engage) require a sales contract
Hosted only; data passes through Twilio rather than your own infrastructure
Visit Segment Details and reviews
How this score is calculated
Editorial fit ×0.341
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Segment a good Google Tag Manager alternative?
Verified facts
4 of 4 verified
Owner
Twilio
Checked Nov 8, 2026segment.com(opens source in a new tab)
Destinations
700+
Checked Nov 8, 2026segment.com(opens source in a new tab)
Pricing basis
Monthly tracked users
Checked Nov 8, 2026segment.com(opens source in a new tab)
Reverse ETL
Yes
Checked Nov 8, 2026segment.com(opens source in a new tab)
4. RudderStack
Best for: Data teams that want Segment-style event pipelines built around their own warehouse
Free plan + paidWeb, Self-hosted
50.0
score / 100
Why switch from Google Tag Manager
Open-source, warehouse-first event pipeline that replaces client-side tags with server-side delivery to your tools.
Pros
Segment-compatible APIs make migration straightforward
Free tier of 250K events a month
Self-hosted data plane available
In-flight transformations and reverse ETL included
Cons
Self-hosted version is source-available (Elastic License 2.0), not open source
Fewer destinations than Segment
Profiles and identity features require the enterprise tier
Visit RudderStack Details and reviews
How this score is calculated
Editorial fit ×0.338
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.15100
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is RudderStack a good Google Tag Manager alternative?
Verified facts
6 of 6 verified
Free plan
Yes, 250K events/month
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)
Starting price
Growth from $265 a month (1M events)
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)
Self-hosting
Yes (Elastic License 2.0)
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)
Destinations
200+ cloud destinations
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)
Free trial
30 days (Growth)
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)
Enterprise plan
Custom pricing
Checked Nov 8, 2026rudderstack.com(opens source in a new tab)

Quick comparison

1. MatomoTop pick

Pros

Cons

Verified facts

2. Cloudflare Zaraz

Pros

Cons

Verified facts

3. Segment

Pros

Cons

Verified facts

4. RudderStack

Pros

Cons

Verified facts