Fospha vs Causality Engine
Fospha is best for enterprise DTC brands wanting impression-level measurement. 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 Fospha; use us as the causal second opinion.
Side by side. Every fact sourced.
Short answer: Keep Fospha. 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 Fospha's impression-based MMM + MTA hybrid, for €99.
Scroll the table sideways for every column.
| Compared on | Causality EngineThe layer on top | FosphaFull-funnel marketing measurement |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep Fospha, add the read |
| Pay once, no subscription | Yes€99 per read; Pro at €299 a month is optional | No public priceQuoted through sales |
| Price stays flat as you grow | Yes€99 a read, whatever your revenue or ad spend | Not stated |
| Money back if it does not help | YesFull refund within 30 days, no questions asked | Not stated |
| Method | Causal inference on your GA4 export | Impression-based MMM + MTA hybrid |
| Starting price | €99 once, excl. VAT | Custom pricingfospha.com/pricing, read |
| Pricing model | €99 per read, or Pro at €299 a month | Four suites, each in Lite, Pro and Enterprise tiers, set in a demo; built for brands spending over $150k a month on ads |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | 2 to 4 weeks |
| Best for | Ecommerce brands on GA4 spending on two or more channels | Enterprise DTC brands wanting impression-level measurement |
| How it gets your data | ||
| Needs its own pixel, tag or SDK | NoNothing to install | No1 |
| 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, Salesforce Commerce Cloud, Amazon3 |
| Server-side tracking or conversion APIs | NoIt reads data you already collect | Not stated |
| What it measures | ||
| Multi-touch attribution | NoCausal attribution: what each channel caused | Yes4 |
| 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 | No7 |
| Free trial or free plan | First finding freeThe €99 read is refundable within 30 days | Demo only (no free trial or free plan mentioned)7 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Not stated |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | Austin, United States8 |
| Founded | 2023 | 20149 |
| States EU data hosting | YesPrimary infrastructure in the EU, per our privacy policy | Not stated |
| 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. fospha.com: “No reliance on tags, pixels, or cookies.”
- 2. fospha.com/platform/integrations: “Google Analytics (GA4) Google's web analytics platform. Fospha ingests GA4 session and event data to support channel mapping”
- 3. fospha.com/platform/integrations: “Shopify The most widely used ecommerce platform. Fospha ingests order and revenue data directly from Shopify to power attribution and measurement.”
- 4. fospha.com/about-fospha: “2022 Launched Fospha Pro, our full-funnel MTA, MMM + Predictive Planning Product.”
- 5. fospha.com/pricing: “Marketing Mix Modeling The strategic lens for planning and budgeting. Measures the online and offline impact of your advertising”
- 6. fospha.com/pricing: “Incrementality Testing Answer your biggest budget questions with GeoLift tests, designed and run by our marketing science team.”
- 7. fospha.com/pricing: “To make sure we find the right plan for your brand, book a demo and discuss with the team.”
- 8. linkedin.com/company/fospha: “Headquarters Austin, TX … 823 Congress Ave / Austin, TX 78701, US (Primary)”
- 9. fospha.com/about-fospha: “2014 Founded by Blenheim Chalcot to tackle marketing's biggest problems through data science.”
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 Fospha falls short
- Enterprise pricing
- Ad platform partnerships create bias
- Impression modeling has wide confidence intervals
- Complex onboarding
What Causality Engine does differently
- No pixel and no tag. It reads the GA4 export you already have.
- 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.
Fospha and Causality Engine: questions
What does Fospha cost?
Fospha publishes no price: it is quoted through sales.How does Fospha measure, and how does Causality Engine?
Fospha: Impression-based MMM + MTA hybrid. Causality Engine: causal inference on your GA4 export, showing what each channel caused next to what last-click gave it.Does Fospha need a pixel or tracking script?
No, according to fospha.com. Causality Engine needs none: nothing to install.Source: fospha.com, 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 Fospha?
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.
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.