Looking for a Klar alternative?
Klar uses pixel-based MTA, MMM and geo tests and is best for eCommerce brands with at least €1M annual net revenue. If the question is which channels actually drove revenue, not which ones were present at the click, Causality Engine answers it from the GA4 export you already have. No pixel.
€99 once, excl. VAT. Keep Klar; use us as the causal second opinion.
Klar and Causality Engine, side by side.
Short answer: Keep Klar. 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 Klar's pixel-based MTA, MMM and geo tests, for €99.
Scroll the table sideways for every column.
| Compared on | Causality EngineThe layer on top | KlarAttribution and insights software for eCommerce |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep Klar, add the read |
| Pay once, no subscription | Yes€99 per read; Pro at €299 a month is optional | Subscription€200/mo |
| 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 | Not stated |
| Method | Causal inference on your GA4 export | Pixel-based MTA, MMM and geo tests |
| Starting price | €99 once, excl. VAT | €200/mogetklar.com/pricing, read |
| Pricing model | €99 per read, or Pro at €299 a month | Two plans priced on last-12-month net revenue: Core from €200/month and Core + Attribution from €400/month; monthly (cancel monthly) or annual (rate locked 12 months); no set-up costs |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | 1-click shop and ad integrations plus Klar tracking script; vendor says onboarding within about 2 hours |
| Best for | Ecommerce brands on GA4 spending on two or more channels | eCommerce brands with at least €1M annual net revenue |
| How it gets your data | ||
| Needs its own pixel, tag or SDK | NoNothing to install | Yes1 |
| Works with Google Analytics 4 | YesA GA4 export is the input | Yes2 |
| Native store integrations | Any store that runs GA4Shopify, WooCommerce, Shopware, Magento or a custom build | Shopify, WooCommerce, Magento / Adobe Commerce, Amazon3 |
| 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 | Yes1 |
| Marketing mix modelling | No | Yes5 |
| Incrementality or holdout tests | NoNo test to run | Yes6 |
| Post-purchase surveys | No | Not stated |
| How you buy it | ||
| Self-serve sign-up | YesUpload at /start | Not stated |
| Free trial or free plan | First finding freeThe €99 read is refundable within 30 days | 14-day free trial7 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Monthly or annual8 |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | Munich, Germany9 |
| Founded | 2023 | 202110 |
| 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. getklar.com/features/multi-touch-attribution: “Klar's first-party tracking pixel and Multi-Touch Attribution (MTA) reveal the true revenue impact of each touchpoint in real time.”
- 2. getklar.com/set-up: “Google Analytics Pull all your GA data into Klar easily by using your property ID.”
- 3. getklar.com/pricing: “It connects natively to your shop system (Shopify, Shopware, Magento, WooCommerce, Centra, Amazon), or to any other shop system via API.”
- 4. help.getklar.com/en/articles/10981661-setting-up-the-klar-pixel-via-serverside-tracking: “Instead of deploying a JS tracking script, you send events directly to Klar's server-side endpoint via HTTP POST requests.”
- 5. getklar.com/features/unified-marketing-measurement: “Klar's Marketing Mix Model (MMM) uncovers how brand awareness and other upper-funnel influences translate into conversions.”
- 6. getklar.com/features/incrementality: “Klar runs incrementality tests through geo-based holdouts”
- 7. getklar.com/pricing: “Yes. 14 days free trial starts after your account is completely set up.”
- 8. getklar.com/pricing: “You can pick the monthly option which allows you to cancel each month. You can instead also pick the annual option”
- 9. getklar.com/imprint: “Klar Insights GmbH, Marktstraße 18, 80802 München, Deutschland.”
- 10. linkedin.com/company/getklar: “Headquarters Munich, Bavaria Type Public Company Founded 2021”
- 11. getklar.com: “We are fully compliant with GDPR and ISO 27001 certified to keep your information safe, hosting your data in Europe only.”
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.
Why brands switch from Klar
- 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 Klar 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.