Every "connect X to Y" page shows you the happy path. Almost none of them tell you which plan tier the native connector actually requires, or what happens to your bill when you route the same integration through middleware instead.
I built an open index of 55 B2B integrations with exactly that math: the minimum plan tier each native connector requires, the API and webhook gates behind it, and a middleware alternative priced the same way (cheapest API-capable tiers plus about $9/month for Make). All of it is calculated for a 10-seat team, from verified vendor pricing pages. The full index is at https://stackcostmatrix.com — and the dataset is open on GitHub.
Here is what the comparison actually shows.
25 times, native is just cheaper
In 25 of the 55 pairs, the native path costs less than the middleware path, full stop. Take ActiveCampaign + Calendly: the native connector runs on the required tiers at $115/month for 10 seats, with 2-way sync and no middleware fee. The middleware route — cheaper tiers plus Make — comes to $124/month. There is no reason to switch; you would pay more to get 1-way sync instead of 2-way.
13 times, middleware is cheaper "on paper"
In 13 pairs, middleware wins on the sticker price — and every one of those wins comes from skipping a forced tier upgrade. The biggest one I found: ActiveCampaign + Pipedrive. The native connector forces tiers that cost $389/month. The middleware route, on the cheapest API-capable tiers plus Make, comes to $164/month — because it skips a $234/month forced upgrade.
That looks like a $225/month saving. Here is the part the middleware pricing page does not put in bold:
- Sync drops from 2-way to 1-way (trigger → action). If you need changes to flow back, the middleware version does not do that.
- You replace a native connector with a third-party dependency. When it breaks, both vendors point at each other.
- Make's free tier covers 1,000 operations a month. Whether that covers your volume is not verified for these pairs — and if it doesn't, the saving shrinks fast.
So "cheaper on paper" is honest, but only if you read the whole sentence.
35 pairs hide a forced upgrade somewhere
Across the index, 35 of the 55 pair pages mention a forced tier upgrade: the tier the native connector requires is higher than the tier you would buy for the app on its own. That is the real hidden cost of integrations — not the middleware fee, not the per-seat price, but the upgrade you did not plan for.
The sharpest single example is Salesforce: its API access on the Professional tier needs a $25/user/month add-on. At 10 seats, that is $250/month before you connect anything. Salesforce + Stripe lands at $1,250/month at 10 seats once that add-on is counted. Miss that line item and your whole integration budget is wrong.
The rule of thumb I now use
- If the native connector runs on tiers you already pay for, take native. It is usually cheaper and it syncs both ways.
- If native forces an upgrade, price the middleware route — but only count it as a win if 1-way sync is genuinely enough for that workflow, and if your operation volume fits the middleware plan.
- Never compare "app A price + app B price" and call it the integration cost. The tier gates and the middleware fee are the cost.
Every pair page on the index shows both paths side by side with a calculator, so you can check your own seat count instead of trusting my 10-seat default: https://stackcostmatrix.com/crm-integration-pricing-guide/
Two calculators worth opening first: ActiveCampaign + Pipedrive (the biggest middleware-on-paper win) and Salesforce + Stripe (the API add-on trap).
The dataset behind all 55 pages is open here: https://github.com/rakeshrkrk56-sketch/stackmatrix — if a price is wrong, the correction belongs in the data, not in a comment thread.
What is the worst forced upgrade you have run into? I am collecting them for the next pricing re-check.
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