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Cometly vs Causality Engine

Cometly is best for B2B SaaS teams (Stripe- and CRM-native), not primarily ecommerce. Choose Causality Engine when you need a defensible per-channel read before a budget decision, from the GA4 export you already have.

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€99 once, excl. VAT. Keep Cometly; use us as the causal second opinion.

Side by side. Every fact sourced.

Short answer: Keep Cometly. Causality Engine is not a replacement for it: it installs nothing and reads the GA4 export you already have, so it adds a read of what each channel caused on top of Cometly's first-party pixel + server-side tracking, for €99.

Scroll the table sideways for every column.

Causality Engine compared with Cometly: data, measurement, buying, company and reviews. Vendor facts read 12 October 2026, each with its source below the table.
Compared onCausality EngineThe layer on topCometlyAttribution built for B2B SaaS
Compatible with Causality EngineIt is the layerReads your GA4 exportYesKeep Cometly, add the read
Pay once, no subscriptionYes€99 per read; Pro at €299 a month is optionalSubscription$750/mo
Price stays flat as you growYes€99 a read, whatever your revenue or ad spendNoPriced on your traffic or events
Money back if it does not helpYesFull refund within 30 days, no questions askedFees are non-refundable1
MethodCausal inference on your GA4 exportFirst-party pixel + server-side tracking
Starting price€99 once, excl. VAT$750/mocometly.com/affiliates, read
Pricing model€99 per read, or Pro at €299 a monthUsage-based on monthly pageviews and quoted on a call, with Core starting at $750/mo; monthly or annual billing; no free trial
SetupUpload a GA4 export; results in 1 to 2 minutesGuided onboarding (no self-serve trial)
Best forEcommerce brands on GA4 spending on two or more channelsB2B SaaS teams (Stripe- and CRM-native), not primarily ecommerce
How it gets your data
Needs its own pixel, tag or SDKNoNothing to installYes2
Works with Google Analytics 4YesA GA4 export is the inputNot stated
Native store integrationsAny store that runs GA4Shopify, WooCommerce, Shopware, Magento or a custom buildShopify, WooCommerce, BigCommerce, Magento / Adobe Commerce, Wix3
Server-side tracking or conversion APIsNoIt reads data you already collectYes4
What it measures
Multi-touch attributionNoCausal attribution: what each channel causedYes5
Marketing mix modellingNoNot stated
Incrementality or holdout testsNoNo test to runNot stated
Post-purchase surveysNoNot stated
How you buy it
Self-serve sign-upYesUpload at /startNot stated
Free trial or free planFirst finding freeThe €99 read is refundable within 30 daysNo free trial6
Billing termsNone for the readPro is billed monthly, cancel any timeMonthly or annual7
Who makes it
HeadquartersUtrecht, NetherlandsNewtown, United States8
Founded202320219
States EU data hostingYesPrimary infrastructure in the EU, per our privacy policyNot stated
What reviewers say
G2Not listed yetNot stated
CapterraNot listed yetNot stated
Shopify App StoreNo appNothing to installNot stated

Causality Engine installs nothing on your site. It reads the GA4 export you already have, so it runs on top of any tool here without touching its setup. The one condition: GA4 runs on your store too. “Not stated” means we could not find it on the vendor's own pages or listings on 12 October 2026; it does not mean the feature is missing.

Sources, read 12 October 2026

  1. 1. cometly.com/terms: “All fees, including subscription fees, overage charges, and Add-On fees, are non-refundable unless otherwise required by applicable law or expressly agreed in writing by Cometly.”
  2. 2. help.cometly.com/en/articles/10340439-install-verify-cometly-pixel: “This pixel must be placed in the <head> section of every website that you want to track.”
  3. 3. cometly.com/integrations: “Shopify … WooCommerce … Track Wix form submissions and store purchases … Pipe BigCommerce orders into Cometly attribution … Track Magento purchases”
  4. 4. cometly.com/pricing: “Both plans include unlimited connections to Meta, Google, LinkedIn, TikTok, Microsoft, Reddit, and Snapchat, including server-side Conversion API.”
  5. 5. cometly.com/pricing: “Core … Pixel Server-Side Tracking Multi-Touch Attribution Events”
  6. 6. cometly.com/pricing: “We don't run a free trial because attribution requires CRM and ad-platform setup to be useful.”
  7. 7. cometly.com/pricing: “Core and Enterprise are both available on monthly or annual billing. Pay annually and save 20%.”
  8. 8. linkedin.com/company/cometly: “Headquarters Newtown, Pennsylvania”
  9. 9. linkedin.com/company/cometly: “Founded 2021”

Every tool we track, on every fact · The same facts as JSON

Competitor pricing is each vendor's publicly listed pricing as read on the date shown, and it changes without notice: verify on the vendor's own site before relying on it. Vendors without a public price are marked as such. Comparisons set Causality Engine's one-time €99 analysis against subscription models.

Where Cometly falls short

  • Requires the Comet Pixel plus server-side setup
  • No free trial, vendor cites required CRM and ad-platform setup
  • Pixel, webhook and click-ID setup required per store
  • Multi-touch tracking, not causal measurement

What Causality Engine does differently

  • No pixel and no tag. It reads the GA4 export you already have, where Cometly needs its own tracking on the store.
  • What each channel caused, next to what last-click gave it, with a data-health score on every channel.
  • The first number 1 to 2 minutes after the upload, on whatever GA4 history you export; 12 months or more reads best.
  • €99 once, excl. VAT. Pro is €299 a month, billed monthly, cancel any time.
  • Full refund within 30 days, no questions asked. You keep the read.

Cometly and Causality Engine: questions

  • What does Cometly cost?
    Cometly's pricing page lists $750/mo.Source: cometly.com/affiliates, read .
  • Does Cometly's price rise as you grow?
    Yes. Priced on your traffic or events, according to its pricing page. Causality Engine is €99 a read, whatever your revenue or ad spend.Source: cometly.com/affiliates, read .
  • How does Cometly measure, and how does Causality Engine?
    Cometly: First-party pixel + server-side tracking. Causality Engine: causal inference on your GA4 export, showing what each channel caused next to what last-click gave it.
  • Does Cometly need a pixel or tracking script?
    Yes, according to help.cometly.com. Causality Engine needs none: nothing to install.Source: help.cometly.com/en/articles/10340439-install-verify-cometly-pixel, read .
  • What does Causality Engine cost?
    The first finding is free and runs in your browser before any signup. The full read is €99 once, excl. VAT, refundable within 30 days, no questions asked. Pro is €299 a month, billed monthly, cancel any time. The price does not rise with revenue, ad spend, orders or traffic.
  • Can I use Causality Engine together with Cometly?
    Yes. Causality Engine installs nothing on your site. It reads the GA4 export you already have, so it runs on top of any tool here without touching its setup. The one condition: GA4 runs on your store too.

Keep reading

Four named Dutch brands and our own store, with the figures they let us publish: the case studies.

GA4 export uploadNo pixel1–2 minutes to a first read30-day refund, no questions asked

Your platforms guess.
We run the math.

Upload a GA4 export and see what each channel caused, next to last-click, in 1–2 minutes. The read is yours to keep.

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The free finding runs in your browser. Your file never leaves it. The full read is €99, refundable within 30 days, no questions asked. Prices exclude VAT.