This is the head-to-head Shopify brands actually search for, and both vendors publish their own version of it. Here is a neutral one, followed by the thing a comparison of two measurement tools never mentions: neither of them can see your shelf.
Direct answer: Triple Whale is a Shopify-native analytics and attribution suite with a pixel, a free tier, and Moby Actions that can queue Meta and Google changes for your approval on its Automate plan; pricing scales with your GMV. Northbeam is a measurement platform for larger brands, from $1,500 a month, with multi-touch attribution and media-mix modelling, and it does not change campaigns. Neither has inventory in its decision logic and neither dayparts. Ralph is not an attribution tool; it is the operator desk that puts variant stock next to spend and stages the action. If you need to know what worked, buy one of them. If you need to stop paying for sizes you cannot ship, that is a different tool.
Side by side
| Triple Whale | Northbeam | Ralph | |
|---|---|---|---|
| Job | Analytics, pixel attribution, AI agent with actions | Multi-touch attribution, MMM, incrementality | Operator desk: stock, Meta and Google, approval queue |
| Best for | Shopify DTC brands from small to large | Brands with meaningful spend and a measurement team or agency | Shopify operators, founder to multi-store |
| Inventory | Forecasting and issue flags; no link to ad actions found | Not mentioned | Variant-level cover and core-size health in every decision |
| Writes to ad accounts | Yes, queued for approval (Automate plan, sales-assisted); optional auto-execution | No; Apex pushes signals to Meta without changing setups | Yes, after approval; writers off by default |
| Dayparting | None (rules can run on a schedule) | None | Meta yes; Google recommend only |
| Attribution | Pixel, multi-touch models, Moby Q&A | Clicks plus deterministic views, MMM+, incrementality | None; P&L from real orders, honest about missing COGS |
| Pricing (seen September 2026) | Free, Foundation, Automate, Enterprise; amounts behind a GMV slider; 12-month terms | Starter $1,500, Professional $3,500 a month; Growth and Enterprise custom | Free £0; £99; £249; £599; private beta |
Triple Whale
The strongest argument for Triple Whale is breadth at a low entry: a free tier with the pixel and dashboards, Shopify-native, and an AI layer that has grown from answering questions to queueing actions. Its approval-by-default model for Moby Actions is the closest thing on this site to Ralph's own posture, and we would rather say that than pretend approval is unique to us. The weakness for our audience is that inventory lives in a forecasting feature, not in the logic that decides to pause an ad, so a broken size run still reads as a performance problem.
Northbeam
Northbeam is what you buy when platform-reported numbers have stopped being believable and the spend is big enough that the answer changes decisions worth more than $1,500 a month. It is deliberately hands-off: it measures and, through Apex, feeds signal back to Meta without touching your campaigns. It has no interest in your warehouse, and does not claim to.
The question both leave open
Both tools will tell you, in different ways, that Tuesday's ROAS was worse than Monday's. Neither can tell you that Tuesday's ROAS was worse because the size 12 sold out at lunchtime and the ad kept paying for clicks to an empty shelf. That is not a flaw in attribution; it is a different job. The trap it creates is explained in when ROAS looks fine and the store still hurts.
Where Ralph sits
Beside them, not instead. Ralph has no pixel and no attribution model. It reads your orders, costs and refunds and shows P&L next to ads, honestly, with COGS missing when it is missing: Shopify P&L that matches how money moves. What it adds is the shelf: variants mapped to catalogue items, cover and core-run health, the campaigns still paying, and the fix staged for a yes. A brand that runs Triple Whale for measurement and Ralph for the morning list is a coherent stack.
Measurement tells you what worked. The operator decides what to stop today. Neither of these two knows your stock, so neither can do the second job.
Questions people actually ask
Triple Whale or Northbeam?
Triple Whale if you are a Shopify DTC brand that wants a pixel, dashboards and an AI that can queue ad actions for approval, with a free tier to start. Northbeam if you spend enough to justify $1,500 a month and want rigorous multi-touch and media-mix measurement without anything touching your campaigns. Both are measurement first.
Does either of them know what is in stock?
Northbeam does not mention inventory anywhere we could find. Triple Whale has inventory forecasting and agents that flag issues, but we found no documented link between stock levels and its ad actions. Neither knows a size sold out at 3pm.
Does either daypart?
No. Triple Whale's actions can run on a recurring schedule, which schedules the rule, not the hour of ad delivery. Northbeam does not change campaigns at all.
Does Triple Whale write to Meta and Google?
Yes, on its Automate plan: Moby Actions can pause an ad, queue budget changes and generate creative, and by default queue each action for your approval. It is sales-assisted rather than self-serve.
Is Ralph an attribution tool?
No. Ralph shows P&L next to ads from your real orders and costs and is honest when COGS is missing. It does not have a pixel and does not model multi-touch attribution. If you need attribution, you need one of these two, and Ralph sits beside them.
If you want stock, ads and the morning list in one place: that is what we built Ralph for. A growth operator for Shopify, with review before anything ships. Not magic. Fewer tabs. See Ralph · Docs