Lebesgue vs Causality Engine
Lebesgue is best for Shopify brands wanting competitive insights and ad auditing. 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 Lebesgue; use us as the causal second opinion.
Side by side. Every fact sourced.
Short answer: Keep Lebesgue. 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 Lebesgue's competitive benchmarking + marketing audit, for €99.
Scroll the table sideways for every column.
| Compared on | Causality EngineThe layer on top | LebesgueAI marketing analytics for ecommerce |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep Lebesgue, add the read |
| Pay once, no subscription | Yes€99 per read; Pro at €299 a month is optional | Subscription$79/mo |
| 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 | Competitive benchmarking + marketing audit |
| Starting price | €99 once, excl. VAT | $79/molebesgue.io/pricing, read |
| Pricing model | €99 per read, or Pro at €299 a month | Free; Ultimate $79/mo, Ultimate AI $149/mo; Le Pixel: Attribution $749/mo |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | 15 minutes |
| Best for | Ecommerce brands on GA4 spending on two or more channels | Shopify brands wanting competitive insights and ad auditing |
| 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 | Yes1 |
| Native store integrations | Any store that runs GA4Shopify, WooCommerce, Shopware, Magento or a custom build | Shopify, WooCommerce, Amazon1 |
| Server-side tracking or conversion APIs | NoIt reads data you already collect | Yes2 |
| What it measures | ||
| Multi-touch attribution | NoCausal attribution: what each channel caused | Yes3 |
| Marketing mix modelling | No | Yes4 |
| 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 plan; 14-day free trial on paid plans6 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Monthly or annual7 |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | San Francisco, United States8 |
| Founded | 2023 | 20219 |
| 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 | 4.9 stars (44 reviews)10 |
| Shopify App Store | No appNothing to install | 4.9 stars (133 reviews)11 |
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. lebesgue.io: “Lebesgue connects with Shopify, WooCommerce, Meta Ads, Google Ads, TikTok Ads, Klaviyo, Amazon, and GA4.”
- 2. lebesgue.io/pricing: “Server-side tracking with Le Enricher”
- 3. lebesgue.io/pricing: “Multi-Touch: Full credit, Linear, Position-Based, Time Decay”
- 4. lebesgue.io/lebesgue-mmm: “We'll train your MMM model on your data and deliver results in about a week.”
- 5. lebesgue.io/pricing: “Get started for free. Grow with data, not guesses.”
- 6. lebesgue.io/pricing: “Start with the most generous free plan in the market.”
- 7. apps.shopify.com/advertising-insights: “$79 / month or $711/year and save 25%”
- 8. linkedin.com/company/lebesgue: “Headquarters San Francisco, California”
- 9. linkedin.com/company/lebesgue: “Founded 2021”
- 10. capterra.com/p/238852/Lebesgue: “Overall rating Based on 44 user reviews See all reviews 4.9”
- 11. apps.shopify.com/advertising-insights: “Rating 4.9 (133)”
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 Lebesgue falls short
- Benchmarking/audit tool, not true attribution
- Reports credit and behaviour, not a counterfactual estimate of what a channel caused
- No causal inference methodology
- Competitive data is directional not precise
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.
Lebesgue and Causality Engine: questions
What does Lebesgue cost?
Lebesgue's pricing page lists $79/mo.Source: lebesgue.io/pricing, read .How does Lebesgue measure, and how does Causality Engine?
Lebesgue: Competitive benchmarking + marketing audit. 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 Lebesgue?
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.