Owned-data MTA stack. Or causal, with no stack to build.
Choose EYKData when you want to own the underlying data architecture (your BigQuery, your Looker, your server-side tracking) and you have the team and patience to stand it up and maintain it. Choose Causality Engine when you want causal inference as the default output, not the premium services tier.
€99 once, excl. VAT. Keep EYKData; use us as the causal second opinion.
Same question, different answer. Often the opposite answer.
- EYKData answers
- What did the rule-based stack credit?Server-side MTA on owned BigQuery
- Causality Engine answers
- What was actually causal, and how far to trust it?Causal inference + a data-health score on every channel
| Compared on | Causality Engine | EYKData |
|---|---|---|
| Method (entry tier) | Causal inference | Correlation-based (vendor's own wording) |
| Causal at entry? | Yes, default | No (Advanced is quote-only) |
| Stack to maintain | None | GTM + BigQuery + Looker Studio + CAPI |
| Price | €99 per read · €299/mo ProExcl. VAT | €399 to €529+/mo entry; Advanced quote-onlyeykdata.com/pricing, read |
| EU / GDPR | Yes (Dutch, EU data residency) | Yes (Dutch) |
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.
Every fact, sourced. And why you can keep EYKData.
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.”
The short version. What each one is for.
EYKData is a Rotterdam-based server-side multi-touch attribution platform with a strong technical thesis: your tracking, your BigQuery, your Looker Studio, no vendor lock-in. Stape-powered GTM, server-side click capture, consent-aware CAPI, and a published €399 Core / €529 Premium entry band by trailing-12-month gross sales. For an EU D2C brand that wants to own its measurement stack end to end, it's a legitimate path.
By their own words it's correlation-based at the entry tiers. Causal MMM and incrementality sit in their quote-only Advanced / early-access tier, and confidence intervals aren't surfaced anywhere we can verify. The core product also assumes you can stand up and maintain GTM + BigQuery + Looker, which is a real engineering commitment even with their server-side stack.
Which one is the right call for your situation.
Choose EYKData when
you want to own the underlying data architecture (your BigQuery, your Looker, your server-side tracking) and you have the team and patience to stand it up and maintain it. The owned-data story is real, the EU backend coverage is solid, and there's a genuine upgrade path to their causal tier if you can absorb a quote.
Choose Causality Engine when
you want causal inference as the default output, not the premium services tier. You don't want to stand up GTM, BigQuery, and Looker Studio to get there. And you want it on your existing GA4 history for €99 a read, no subscription that scales with your sales.
Take it to your CFO.
No GTM build, no BigQuery, no Looker dashboards to commission. A €99 credit-card read versus standing up and maintaining a full server-side analytics stack just to reach the causal tier (which is quote-only).
The questions buyers ask about us vs EYKData.
Is Causality Engine an EYKData alternative?
For the causal question without standing up a BigQuery stack, yes. For owning your own server-side data pipeline end to end, EYKData is the explicit product for that.Do I need a BigQuery instance or GTM container?
No. We run on your GA4 export (CSV). No data pipeline to set up.Both are Dutch. Why pick one?
Pick by method and install cost. EYKData is correlation-based at the entry tier and assumes you can run a server-side analytics stack. We ship causal inference as the base product, with last-click beside it, on a CSV upload, for €99. Both are EU-resident, both are GDPR-aligned.
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.
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.
Rather talk first? Book a 30-minute call.