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Switch from Eyk to Causality Engine

Eyk uses server-side tracking with multi-touch attribution. Causality Engine uses causal inference on your GA4 export. There is nothing to migrate: the first read takes 1 to 2 minutes, and you can run both side by side.

Get your first finding freeOr book a 30-min call.

€99 once, excl. VAT. Keep Eyk running while you compare.

Eyk and Causality Engine, side by side.

Short answer: Keep Eyk. 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 Eyk's server-side tracking with multi-touch attribution, for €99.

Scroll the table sideways for every column.

Causality Engine compared with Eyk: data, measurement, buying, company and reviews. Vendor facts read 12 October 2026, each with its source below the table.
Compared onCausality EngineThe layer on topEykMarketing data platform for e-commerce profit and growth
Compatible with Causality EngineIt is the layerReads your GA4 exportYesKeep Eyk, add the read
Pay once, no subscriptionYes€99 per read; Pro at €299 a month is optionalSubscription€339/mo billed yearly; €399/mo monthly
Price stays flat as you growYes€99 a read, whatever your revenue or ad spendNoPriced on your revenue
Money back if it does not helpYesFull refund within 30 days, no questions askedFees are non-refundable1
MethodCausal inference on your GA4 exportServer-side tracking with multi-touch attribution
Starting price€99 once, excl. VAT€339/mo billed yearly; €399/mo monthlyeykdata.com/pricing, read
Pricing model€99 per read, or Pro at €299 a monthThree plans (Core, Premium, Advanced) priced by gross sales over the last 12 months in revenue bands; monthly billing, or yearly billing at a 15% discount
SetupUpload a GA4 export; results in 1 to 2 minutesEyk team sets up server-side tracking (Shopify collaborator access or Magento/Firmhouse access) and you connect data sources
Best forEcommerce brands on GA4 spending on two or more channelsFast-growing e-commerce brands
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, Magento / Adobe Commerce3
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 /startYes6
Free trial or free planFirst finding freeThe €99 read is refundable within 30 daysFree trial (length not stated)7
Billing termsNone for the readPro is billed monthly, cancel any timeMonthly or yearly (15% discount)8
Who makes it
HeadquartersUtrecht, NetherlandsRotterdam, Netherlands9
Founded2023202210
States EU data hostingYesPrimary infrastructure in the EU, per our privacy policyYes11
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. eykdata.com/terms-conditions: “Payment is due in advance at the start of each billing cycle and is non-refundable.”
  2. 2. eykdata.com: “Run our best-in-class server-side tracking within your own Google Tag Manager to feed conversion data to your marketing channel's algorithms.”
  3. 3. eykdata.com/pricing: “App & templates for Shopify, Magento & WooCommerce”
  4. 4. eykdata.com/pricing: “Server-side tracking App & templates for Shopify, Magento & WooCommerce Conversion api's to all main marketing destinations”
  5. 5. eykdata.com/pricing: “Attribution Multi-touch attribution Server-side tracking”
  6. 6. eykdata.com/pricing: “Onboarding & Support Self-serve onboarding Chat support”
  7. 7. eykdata.com/pricing: “Support during free trial and onboarding? Yes! Send in a support ticket or schedule a demo”
  8. 8. eykdata.com/pricing: “Monthly billing Yearly billing 15% discount”
  9. 9. eykdata.com: “Stationsplein 45, Groothandelsgebouw, 3013AK Rotterdam”
  10. 10. linkedin.com/company/eyk-data: “Headquarters Rotterdam, South Holland Type Privately Held Founded 2022”
  11. 11. docs.eykdata.com/guides/custom-data/bigquery-hook-tables: “The location of your Eyk project, EU unless agreed otherwise.”

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.

How to switch, in five steps.

  1. No cancellation required yet

    Keep Eyk running. Causality Engine reads your GA4 CSV export, so nothing conflicts and no data moves between the two.

  2. Upload your GA4 CSV (no integration required)

    Export 12 months or more of GA4 data and upload it. Longer reads better. No OAuth, no pixel, no code, no DNS changes. Shopify native is on the roadmap.

  3. Run your first analysis

    What each channel caused, next to last-click, with a data-health score on each, 1 to 2 minutes after the upload. Compare it with what Eyk was telling you.

  4. Evaluate side by side

    Run both for a month and compare them channel by channel. Where they disagree is where a budget decision is at stake.

  5. Cancel Eyk when ready

    Only if the side-by-side says you should. Nothing in Causality Engine depends on Eyk being gone.

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.

Get your first finding free

Free, in your browser: your file is not uploaded. The full read is €99, refundable within 30 days. Prices exclude VAT.
Or book a 30-min call.