Glew vs Causality Engine
Glew is best for ecommerce brands wanting operational BI dashboards. 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 Glew; use us as the causal second opinion.
Side by side. Every fact sourced.
Short answer: Keep Glew. 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 Glew's BI dashboarding + reporting, for €99.
Scroll the table sideways for every column.
| Compared on | Causality EngineThe layer on top | GlewEcommerce analytics and BI |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep Glew, 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 | No refunds; annual term with no early termination1 |
| Method | Causal inference on your GA4 export | BI dashboarding + reporting |
| Starting price | €99 once, excl. VAT | Custom pricingglew.io/pricing, read |
| Pricing model | €99 per read, or Pro at €299 a month | Glew Pro (annual prepayment, free trial) and Glew Plus (custom); no prices published |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | 30 minutes |
| Best for | Ecommerce brands on GA4 spending on two or more channels | Ecommerce brands wanting operational BI dashboards |
| How it gets your data | ||
| Needs its own pixel, tag or SDK | NoNothing to install | No |
| 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, BigCommerce, 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 | No4 |
| 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 | Yes5 |
| Free trial or free plan | First finding freeThe €99 read is refundable within 30 days | Free trial (Glew Pro); length not stated5 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Annual prepayment (Glew Pro); custom pricing (Glew Plus)6 |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | Charlotte, United States7 |
| Founded | 2023 | 20148 |
| 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 | 4.3 stars (59 reviews)9 |
| 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. glew.io/terms-of-use: “Unless otherwise specified, the subscription term is annual. There is no early termination and no refunds.”
- 2. glew.io/articles/ga4-6-essential-updates-you-should-know: “Through our ELT procedure, you can seamlessly integrate both UA and GA4 data”
- 3. glew.io/solutions/marketing-analytics: “integrating comprehensive data from ecommerce platforms like Shopify, BigCommerce, Salesforce Commerce Cloud, Magento, or custom carts”
- 4. glew.io/faqs: “Glew provides the option for you to toggle between first-order (credit for all sales to the channel that drove the first sale) and last-click attribution”
- 5. glew.io/pricing: “Start free trial”
- 6. glew.io/pricing: “For teams wanting more advanced data insights and reporting. Requires annual prepayment.”
- 7. linkedin.com/company/glew: “Headquarters Charlotte, NC”
- 8. glew.io/company/about: “Glew was founded in 2014 by father-and-son entrepreneurs Michael and Carmen Vadini.”
- 9. capterra.com/p/160516/Glew: “Overall rating Based on 59 user reviews See all reviews 4.3”
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 Glew falls short
- BI dashboards, no marketing attribution
- Built for store reporting, not for estimating incremental channel contribution
- No causal or incrementality methods
- Operational analytics not marketing measurement
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.
Glew and Causality Engine: questions
What does Glew cost?
Glew publishes no price: it is quoted through sales.How does Glew measure, and how does Causality Engine?
Glew: BI dashboarding + reporting. Causality Engine: causal inference on your GA4 export, showing what each channel caused next to what last-click gave it.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 Glew?
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.