Causality Engine vs Appsflyer: Honest Comparison for eCommerce
AppsFlyer is a mobile measurement partner for app marketers, with SDK-based install and in-app attribution. Causality Engine is a €99 causal read on your GA4 export that shows what each channel caused for an online store.
€99 once, excl. VAT. Full refund within 30 days, no questions asked. You keep the read.
By Joris van Huët, Founder & CEOUpdated 4 min read
Causality Engine vs AppsFlyer: at a glance
Short answer: Keep AppsFlyer. 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 AppsFlyer's mobile measurement partner (MMP) attribution, for €99.
Scroll the table sideways for every column.
| Compared on | Causality EngineThe layer on top | AppsFlyerMobile attribution and marketing analytics |
|---|---|---|
| Compatible with Causality Engine | It is the layerReads your GA4 export | YesKeep AppsFlyer, add the read |
| Pay once, no subscription | Yes€99 per read; Pro at €299 a month is optional | Usage-basedFree plan; Growth $0.07 per conversion |
| Price stays flat as you grow | Yes€99 a read, whatever your revenue or ad spend | NoPriced on conversions |
| 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 | Mobile measurement partner (MMP) attribution |
| Starting price | €99 once, excl. VAT | Free plan; Growth $0.07 per conversionappsflyer.com/pricing, read |
| Pricing model | €99 per read, or Pro at €299 a month | Zero (free), Growth pay-as-you-go at $0.07 per conversion after a free welcome package, Enterprise custom |
| Setup | Upload a GA4 export; results in 1 to 2 minutes | 1 to 2 weeks (SDK integration) |
| Best for | Ecommerce brands on GA4 spending on two or more channels | Mobile app marketers and gaming companies |
| How it gets your data | ||
| Needs its own pixel, tag or SDK | NoNothing to install | Yes |
| 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 | Not stated |
| 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 | Not stated |
| Incrementality or holdout tests | NoNo test to run | Yes4 |
| 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 (Zero)6 |
| Billing terms | None for the readPro is billed monthly, cancel any time | Pay-as-you-go (Growth, $0.07 per conversion); custom pricing (Enterprise)7 |
| Who makes it | ||
| Headquarters | Utrecht, Netherlands | San Francisco, United States8 |
| Founded | 2023 | 20119 |
| 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 | 4.5 stars (138 reviews)10 |
| 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. appsflyer.com/legal/terms-of-use: “All amounts owed to AppsFlyer are non-cancellable and fees paid are non-refundable, except as explicitly otherwise stated in the Agreement.”
- 2. appsflyer.com/products/measurement/web-attribution: “Send high-value web events via server-to-server postbacks to Google, Meta, TikTok, Snap, and X”
- 3. appsflyer.com/pricing: “Attribution Mobile attribution Real-time mobile measurement and reporting Multi-touch attribution”
- 4. appsflyer.com/products/measurement/incrementality: “Unify last-touch attribution with automated incrementality testing for the complete picture.”
- 5. appsflyer.com/pricing: “Zero Sign up Growth Sign up Enterprise Request a demo”
- 6. appsflyer.com/pricing: “Free Zero Ideal for apps seeking a simple tool for owned media activities*”
- 7. appsflyer.com/pricing: “Following the Welcome Package, conversions are priced at $0.07 each.”
- 8. linkedin.com/company/appsflyerhq: “Headquarters San Francisco, CA Type Privately Held”
- 9. appsflyer.com/company/about: “2011: The beginning When we started, the app economy was taking shape”
- 10. capterra.com/p/156811/AppsFlyer: “AppsFlyer Software Review 2026: Features, Integrations, Pros & Cons 4.5 ( 138 )”
Causality Engine vs Appsflyer: Honest Comparison for eCommerce
AppsFlyer is a mobile measurement partner (MMP): an SDK in your app attributes installs and in-app events, with a limited free tier and custom enterprise pricing (appsflyer.com/pricing, as read on 2026-09-08). Causality Engine is a €99 causal read on the GA4 export of an online store, showing what each channel caused next to what last-click gave it. If you market an app, AppsFlyer is built for it; if you sell through a web store, the read is.
For Shopify brands in beauty, fashion, supplements or any other category, the choice comes down to what you sell through. Causality Engine needs no SDK or pixel: it runs causal inference on your GA4 export to show which channels cause revenue and which only collect credit, which is what budget allocation needs.
Key Differences
| Feature | Causality Engine | AppsFlyer |
|---|---|---|
| Core Function | Causal attribution for an online store | Mobile attribution and marketing analytics |
| Method | causal inference on a GA4 export | Mobile measurement partner (MMP) attribution |
| Measures | What each channel caused, next to what last-click gave it | App installs and in-app events |
| Setup | Upload a GA4 export; no SDK or pixel | SDK integration |
| Ideal For | Online stores with a GA4 export | Mobile app marketers and gaming companies |
| Pricing | €99 one-time, or €299/month for Pro | Free tier (limited); custom enterprise pricing |
AppsFlyer's pricing as read on its pricing page on 2026-09-08 (appsflyer.com/pricing); check it before relying on it.
When to Choose Causality Engine
Choose Causality Engine if you sell through a web store tracked by GA4 and your question is where marketing budget should go. It answers questions like:
"Is my marketing budget going to the channels that actually cause sales?"
"Which channels get more credit under last click than they cause?"
"Where should I test a budget change first?"
It works at the channel level from a GA4 export, with no SDK, for €99 once. To learn more about the method, see our guide to causal attribution.
When to Choose AppsFlyer
Choose AppsFlyer if you market a mobile app: it is a mobile measurement partner built for app marketers and gaming companies, attributing installs and in-app events through its SDK. If your main priority is one source of truth for your mobile marketing data, and you can take on an SDK integration, AppsFlyer is the better fit; marketing attribution for a web store is a different job.
Pricing Comparison
Causality Engine costs €99 once for a read on a GA4 export, or €299/month for Pro, billed monthly, with a lifetime data look-back and AI chat. There is no minimum spend or revenue.
AppsFlyer has a limited free tier, and its paid plans are priced on a custom basis (appsflyer.com/pricing, as read on 2026-09-08). The full table of the tools we track carries each vendor's source page and read date.
Conclusion
The two are built for different jobs. AppsFlyer measures app installs and in-app events for app marketers; Causality Engine reads what each channel caused for an online store from a GA4 export. If you run both an app and a store, they don't overlap.
FAQs
1. Can I use Causality Engine if I have a mobile app?
Yes, for the web side: a read works on your GA4 export's channel groups, so it covers the marketing that sends traffic to your store. It is not a mobile attribution platform like AppsFlyer and doesn't attribute app installs.
2. Does Causality Engine offer the same level of data integration as AppsFlyer?
No. The read runs on a GA4 export; direct connections to Shopify, Meta, Google and TikTok are on the roadmap, not live. AppsFlyer, as a mobile measurement partner, collects its data through its SDK; Facebook Ads traffic to your store shows up in the read under Paid Social.
The attribution models used by AppsFlyer are based on correlation, which can be misleading.
Related Resources
Causality Engine vs Adjust: Honest Comparison for ecommerce
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Causality Engine vs Neustar: Honest Comparison for ecommerce
Frequently asked questions
Can I use Causality Engine if I have a mobile app?
Yes, for the web side: a read works on your GA4 export's channel groups, so it covers the marketing that sends traffic to your store. It is not a mobile attribution platform like AppsFlyer and doesn't attribute app installs.Does Causality Engine offer the same level of data integration as AppsFlyer?
No. The read runs on a GA4 export; direct connections to Shopify, Meta, Google and TikTok are on the roadmap, not live. AppsFlyer, as a mobile measurement partner, collects its data through its SDK.
Go deeper: Causal attribution, explained.
Sixty-second versions of these ideas: Causality Engine on YouTube Shorts.
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Terms in this article
- AttributionAttribution identifies user actions that contribute to a desired outcome and assigns value to each. It reveals which marketing touchpoints drive conversions.
- Attribution ModelAn Attribution Model defines how credit for conversions is assigned to marketing touchpoints. It dictates how marketing channels receive credit for sales.
- Attribution PlatformAttribution Platform is a software tool that connects marketing activities to customer actions. It tracks touchpoints across channels to measure campaign impact.
- Causal AttributionCausal Attribution uses causal inference to determine which marketing touchpoints genuinely cause conversions, not just correlate with them.
- Causal InferenceCausal inference is the set of methods for estimating how much an outcome changes because of a cause, rather than alongside it. It works by comparing what happened with an estimate of what would have happened without the cause.
- Facebook AdsFacebook Ads are paid advertisements appearing on Facebook and Instagram. Businesses use them to target specific audiences based on demographics and interests.
- Marketing AnalyticsMarketing analytics measures, manages, and analyzes marketing performance to improve effectiveness and ROI. It tracks data from various marketing channels to evaluate campaign success.
- Marketing AttributionMarketing attribution assigns credit to marketing touchpoints that contribute to a conversion or sale. Causal inference enhances attribution models by identifying true cause-effect relationships.