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WhatsApp marketing metrics: the KPIs that really matter

Tracking the right WhatsApp marketing metrics is what separates those who improve their campaigns from those who send and hope. The advantage of WhatsApp is that every stage leaves a measurable trace: you know how many messages were delivered, read, how many generated a reply and how many turned into a sale. The problem is that people often stop at the number of sends, which on its own says nothing. In this guide we look at the KPIs that really matter and how to read them to understand where to act.

The funnel of WhatsApp metrics

The most useful way to reason about metrics is to see them as a funnel: each stage filters the previous one. You start from messages sent, then look at how many were delivered, how many read, how many received a reply and finally how many led to a conversion. If you read the numbers in this order, you immediately understand at which level something breaks: low delivery is a list problem, a low reply rate is a message or offer problem.

1. Delivery rate

It is the percentage of messages actually delivered compared to those sent. A low delivery rate signals wrong numbers, contacts no longer active or account quality issues. It is the first KPI to look at: if the message doesn't arrive, everything else is useless. Keeping the contact list clean and updated is the best way to keep it high.

2. Read rate

How many of the delivered messages are actually opened. On WhatsApp this number is typically very high, much more than via email, and it is one of its great advantages. But if the read rate drops, it may mean you're writing to the wrong people or too often, and they start ignoring you.

3. Reply rate

The percentage of recipients who replied to the message. It is perhaps the most valuable KPI, because WhatsApp is a conversational channel: a reply is a customer who is engaging. A low reply rate on a message read by many indicates that the offer isn't convincing or that the message doesn't invite action. Here you work on text, tone and call to action.

4. Conversion rate

The final KPI: how many recipients took the action you wanted (purchase, booking, quote request). It is what connects the campaign to revenue. It should always be read together with the others: a low conversion with high replies is a closing problem; a low conversion with low replies is a problem further upstream.

Mistakes to avoid when reading the data

• Looking only at the number of sends: it's a vanity metric, it doesn't say whether it works.
• Comparing different campaigns without context: a promotional broadcast and a notification don't share the same benchmarks.
• Drawing conclusions from few sends: you need enough numbers for a rate to make sense.
• Ignoring the segment: the same content performs differently on different lists.

Change only one variable at a time between one campaign and the next (the text, the timing or the segment). Only then will you know what really moved the numbers.

How to do it with SendApp

With SendApp Agent you launch broadcast campaigns with templates and {name} variables and monitor how the messages perform. Segmenting by tag in the CRM lets you compare how different groups of contacts respond and refine your lists. The AI agent that handles conversations and the multichannel inbox give you the picture of what happens after sending, where real conversion is born. Reading the numbers in the right order, from delivery to conversion, tells you where to act on the next campaign.

How much it costs

SendApp starts at 19 euros per month, with campaigns, CRM and multichannel inbox included. With the official Meta APIs, Cloud API messages are billed by Meta according to its rates, with no SendApp markup; via WhatsApp Web with QR you don't pay per message. Measuring campaigns well is what turns spending on messages into an investment that pays off.