What they remember. Or what actually caused the sale.
Fairing (previously Enquire Labs) runs zero-party post-purchase surveys on the Shopify thank-you page. 'How did you hear about us?' lands a self-reported answer that pixels and platforms can't see: dark social, podcasts, word of mouth, an influencer five weeks ago. For brands acquiring through channels their pixel doesn't track, that signal is uniquely valuable.
What it isn't: a statistical measurement of incremental impact. Reviewers consistently flag recency bias and recall error, and Fairing's own guidance frames it as a complement, not a replacement. Pricing is reported in tiers from free (≤100 orders) up to ~$199/mo (third-party directory figures; treat as indicative).
// Fairing answers what does the customer remember? → post-purchase survey on the thank-you page // Causality Engine answers what actually caused the sale? → causal inference + confidence intervals
Same question, different answer. Often the opposite answer.
| Causality Engine | Fairing | |
|---|---|---|
| Method | Quantitative causal inference on GA4 + Shopify | Self-reported post-purchase survey |
| Confidence intervals? | Yes | N/A (qualitative) |
| Surfaces dark / offline channels? | Indirect (via residual unexplained spend) | Yes, directly (survey response) |
| Install | None | Survey widget on thank-you page |
| Price | €99 per read · €299/mo Pro | Reported free–$199/mo by order volume |
Which one is the right call for your situation.
Choose Fairing when
your channel mix has dark-social, podcast, influencer, or offline components that pixels and last-click can't see, and you want the customer's own answer about discovery. That qualitative signal is uniquely Fairing's lane.
Stack Causality Engine alongside when
the question is quantitative: how much incremental revenue did each spend channel actually cause, with confidence intervals. Self-reported survey answers and causal inference are different evidence; many brands run both and triangulate.
Not the same question. Surveys recover signal pixels can't see; causal inference quantifies what would have happened anyway. Run both; the budget decision sits on the causal side.
The questions buyers ask about us vs Fairing.
- Is Causality Engine a Fairing alternative?
- Not directly. Fairing captures customer self-reports; we quantify causal incrementality from your data. Brands often run both.
- Do you measure dark social or offline?
- Indirectly. The causal model surfaces unexplained spend or residual variance the platforms can't account for. For named-channel discovery, Fairing's survey is the direct tool.
Every causal vs MTA tool in one row each.
They track clicks. We measure cause. Four of these five tools are pixel or multi-touch-attribution dashboards on an annual contract; they reassign credit for conversions that already happened, and they need a script installed and maintained. Causality Engine measures incrementality, the sales a channel actually caused, from your existing GA4 and Shopify export, no pixel, with confidence intervals, for €99 a read. Different question, different bill, different install.
| Tool | Core method | Causal? | Pixel / SDK? | Time to value | Pricing model | Yr-1 fully loaded | Contract |
|---|---|---|---|---|---|---|---|
| Causality Engine | Causal inference (Bayesian) on GA4 + Shopify | Yes, native | None | 5–10 min | €99 per read · €299/mo Pro | €99 one-time · €3,588/yr Pro | Credit card, cancel anytime |
| Triple Whale | Pixel + MTA (Clicks & Deterministic Views) | No | Yes (Triple Pixel) | Days (after pixel install and data) | Subscription, GMV tiers | €600–1,500/mo loaded | 12-month minimum |
| Northbeam | ML MTA + MMM + incrementality (2026 add-on) | Partial (newer layer) | Yes (script + UTMs) | Weeks (onboarding) | Subscription, mostly quote | €1,500–2,500/mo | 12-month minimum |
| Rockerbox | MTA + MMM + incrementality (enterprise) | Yes (native) | Yes (integration) | Weeks (config + experiments) | Quote only | €2,000–4,000/mo + onboarding | 12-month minimum |
| Hyros | Server-side click tracking + MTA | No | Yes (watcher scripts, heavy) | 2–12 weeks (setup) | Subscription, demo-gated | €500–5,000/mo by spend | Annual standard |
| Wicked Reports | First-party click MTA (LTV focus) | No | Yes (pixel + CRM/UTM) | Days to weeks | Subscription, by contacts | €550–1,200/mo + integration | Annual standard |
| Cometly | MTA pixel + server-side + CAPI | No | Yes (Comet Pixel + CAPI) | Days (post pixel install) | Quote-only, usage-based | Reported from ~$150/seat/mo | Annual or quote |
| Billy Grace | Deep-learning MTA + Unified Marketing Measurement | Modeled, no CIs | Yes (own first-party pixel) | Demo-gated onboarding | Subscription, by ad spend | €499–3,250/mo + €99 integrations | Demo-gated |
| EYKData | Server-side MTA on owned BigQuery (correlation-based) | Quote-only top tier | Yes (GTM + BigQuery + Stape) | Weeks (stack stand-up) | Subscription, by sales | €399–€529+/mo (Advanced = quote) | Subscription |
| Funnel.io | Data integration / ETL platform | Add-on at quote-only top tier | Connectors / warehouse | Weeks (pipeline build) | Flexpoint consumption | $300–600+/mo (Measure tier ≥$500k spend) | Annual |
| Supermetrics | Marketing data pipeline / connectors | No (claims unverified) | Connectors | Hours per source | Per-source subscription | Reported ~$49–299/mo | Annual |
| Elevar | Shopify server-side conversion tracking + data layer | No (not attribution) | Yes (data layer install) | 1–2 weeks (setup) | Subscription, by orders | $225–3,000+/mo + $1k–4.5k install | Monthly |
| Fairing | Post-purchase survey (zero-party) | No (self-reported) | Survey widget | Minutes (install) | Subscription, by orders | Free–$199/mo (reported) | Monthly |
| Google Ads | Self-attributing network, data-driven attribution | No (window-bound, self-mediated) | Native | Built in | Native to ad platform | Free (with the spend) | Native, no contract |
| Meta Ads Manager | Self-attributing, 7-day click + 1-day view default | No (view-through inflates) | Native + Meta Pixel/CAPI | Built in | Native to ad platform | Free (with the spend) | Native, no contract |
| TikTok Ads Manager | Self-attributing, 7-day click + 1-day view | No (passive-feed view-through) | Native + TikTok Pixel | Built in | Native to ad platform | Free (with the spend) | Native, no contract |
| Shopify Marketing Reports | Last-click (last non-direct), rules-based | No (erases assists) | Native | Built in | Included with Shopify | Free (with the plan) | Native, no contract |
| GA4 | Data-driven attribution, click/visit-based | No (ignores impressions, no control group) | Native GA4 tag | Built in | Free | Free | Native, no contract |
Prices reflect publicly-published tiers or industry-standard fully-loaded estimates as of 2026-06. Not vendor quotes.
Run the side-by-side. Upload your GA4 export, get incremental ROAS with confidence intervals in 5–10 minutes, €99. Refundable if the first read doesn't pay for itself in one reallocation decision. Keep your current tool; use us as the independent causal second opinion.
We're the only one in this table without an ad budget, or a dashboard subscription, to protect.
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