What WhatsApp Business API really costs

A WhatsApp bill has three parts: the platform subscription, Meta's own per-message charges, and whatever margin the platform adds on top of Meta's rates. Vendors advertise the first. Reviewers of one major platform have documented real bills landing at roughly five times the headline price.

Part one: the subscription

This is the number on the pricing page and the easiest to compare. Wati starts around $69 a month with Pro at $149. respond.io's Starter is $79, though that tier excludes automation, broadcasts and AI entirely, which puts the real entry point at $159.

It is also the part that matters least, because it is fixed and knowable. The parts that hurt are the ones that move.

Part two: Meta's charges, which are not the platform's

Meta bills for WhatsApp separately from whatever you pay your platform. The rates vary by country and by category — marketing, utility, authentication and service are priced differently — and from 1 October 2026 service messages become billable too, which removes the free lane that customer support has lived in.

Two consequences worth planning for. First, a support conversation now has a per-message price, so replies-per-resolution has become a cost line rather than a quality metric. Second, the bill scales with how much you message rather than how much you sell, which is a different shape from every other tool in your stack.

Part three: the markup, which nobody advertises

This is the part that surprises people. Most WhatsApp platforms do not pass Meta's rates through at cost — they resell them with a margin.

The reported numbers: Wati adds roughly 20% to Meta's per-template-message rates, which works out at around $90 a month extra at 3,000 marketing messages and about $300 at 10,000. Interakt's markup is reported at around ₹17,600 a month at 100,000 marketing messages.

Neither is hidden exactly — it is in the documentation if you look. But it is not in the comparison table, and it is invisible until the invoice arrives. A reviewer summed the category up in a line that appears almost verbatim across several reviews: "every tiny bit is priced and chargeable".

Working out your own number

You need two figures from your own history, and neither takes long:

• Conversations per month. Count them for a normal month, not your best one.
• Replies per conversation. Take twenty recent threads and average them. Most stores are surprised by this number, and it is usually the one worth improving.

Multiply those together for your billable message volume, apply Meta's published rate for your country and category, then ask your platform in writing whether they add a margin and how much. The third question is the one that gets skipped and the one that changes the answer.

The multiplier that catches people

Support messages do not scale with orders — they scale faster. A delayed parcel produces a thread that restarts every few days until it arrives, and those are exactly the conversations that run longest. Model your peak at more than your order multiplier, not the same.

The billing problems behind the ratings

The WhatsApp platform category has a striking pattern: strong scores on G2 and Capterra, much weaker ones on Trustpilot. AiSensy sits at 4.1 on Trustpilot with 38% one-star reviews against 58% five-star — almost nothing in between.

The complaints cluster on billing rather than product. Cancellation friction is the dominant recent theme, with one Wati reviewer documenting $480 charged after requesting cancellation. Support is largely email-based on both Wati and Interakt, which reviewers say stalls issues mid-campaign — and one Interakt customer reported an active paid subscription ending without warning, stopping every campaign, with no resolution after three days of follow-up.

That last one is the failure worth designing against. An agent that stops answering mid-conversation because of a billing state is not a pricing problem; it is a customer of yours being ignored.

What to ask before you commit

Do you mark up Meta's rates, and by how much?

A straight answer is a good sign regardless of the number. Evasion on this question tells you what the invoice will feel like.

What happens if a payment fails?

Specifically: does the agent stop answering customers, and how much warning do I get? The right answer is a warning first and degradation second, never a silent stop mid-conversation.

How do I cancel?

If the answer involves emailing someone, read the recent Trustpilot reviews before signing. It is the single most reliable predictor of how the relationship ends.

Where we sit

Thredo charges for the agent, not for your messages. Meta bills you directly at their published rates and we add nothing to them — so the markup question has a boring answer, which is the point of asking it.

What we do charge for is replies handled, included in the plan and capped at a number you can read before you buy. Your busiest month costs the same as your quietest.

Common questions

Published 13 September 2026. Meta’s rates vary by market and change; platform markups are as reported by the linked sources at the time of writing. Verify both against current documentation before budgeting from them.