Eyk vs Causality Engine
Eyk is best for fast-growing e-commerce brands. Choose Causality Engine when you need a defensible per-channel read before a budget decision, from the GA4 export you already have.
€99 once, excl. VAT. Keep Eyk; use us as the causal second opinion.
Side by side. Every fact sourced.
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.
| Compared on | Causality EngineThe layer on top | EykMarketing data platform for e-commerce profit and growth |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep Eyk, add the read |
| Pay once, no subscription | Yes€99 per read; Pro at €299 a month is optional | Subscription€339/mo billed yearly; €399/mo monthly |
| Price stays flat as you grow | Yes€99 a read, whatever your revenue or ad spend | NoPriced on your revenue |
| Money back if it does not help | YesFull refund within 30 days, no questions asked | Fees are non-refundable1 |
| Method | Causal inference on your GA4 export | Server-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 month | Three 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 |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | Eyk team sets up server-side tracking (Shopify collaborator access or Magento/Firmhouse access) and you connect data sources |
| Best for | Ecommerce brands on GA4 spending on two or more channels | Fast-growing e-commerce brands |
| How it gets your data | ||
| Needs its own pixel, tag or SDK | NoNothing to install | Yes2 |
| Works with Google Analytics 4 | YesA GA4 export is the input | Not stated |
| Native store integrations | Any store that runs GA4Shopify, WooCommerce, Shopware, Magento or a custom build | Shopify, WooCommerce, Magento / Adobe Commerce3 |
| Server-side tracking or conversion APIs | NoIt reads data you already collect | Yes4 |
| What it measures | ||
| Multi-touch attribution | NoCausal attribution: what each channel caused | Yes5 |
| Marketing mix modelling | No | Not stated |
| Incrementality or holdout tests | NoNo test to run | Not stated |
| Post-purchase surveys | No | Not stated |
| How you buy it | ||
| Self-serve sign-up | YesUpload at /start | Yes6 |
| Free trial or free plan | First finding freeThe €99 read is refundable within 30 days | Free trial (length not stated)7 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Monthly or yearly (15% discount)8 |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | Rotterdam, Netherlands9 |
| Founded | 2023 | 202210 |
| States EU data hosting | YesPrimary infrastructure in the EU, per our privacy policy | Yes11 |
| What reviewers say | ||
| G2 | Not listed yet | Not stated |
| Capterra | Not listed yet | Not stated |
| Shopify App Store | No appNothing to install | Not 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. eykdata.com/terms-conditions: “Payment is due in advance at the start of each billing cycle and is non-refundable.”
- 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. eykdata.com/pricing: “App & templates for Shopify, Magento & WooCommerce”
- 4. eykdata.com/pricing: “Server-side tracking App & templates for Shopify, Magento & WooCommerce Conversion api's to all main marketing destinations”
- 5. eykdata.com/pricing: “Attribution Multi-touch attribution Server-side tracking”
- 6. eykdata.com/pricing: “Onboarding & Support Self-serve onboarding Chat support”
- 7. eykdata.com/pricing: “Support during free trial and onboarding? Yes! Send in a support ticket or schedule a demo”
- 8. eykdata.com/pricing: “Monthly billing Yearly billing 15% discount”
- 9. eykdata.com: “Stationsplein 45, Groothandelsgebouw, 3013AK Rotterdam”
- 10. linkedin.com/company/eyk-data: “Headquarters Rotterdam, South Holland Type Privately Held Founded 2022”
- 11. docs.eykdata.com/guides/custom-data/bigquery-hook-tables: “The location of your Eyk project, EU unless agreed otherwise.”
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 Eyk falls short
- Needs its own pixel or tag on the site, and browser privacy controls limit what a pixel can observe
- Multi-touch attribution allocates credit across observed touchpoints; it is not a counterfactual estimate of what a channel caused
What Causality Engine does differently
- No pixel and no tag. It reads the GA4 export you already have, where Eyk 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.
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.
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.