WhatsApp marketing for e‑commerce: is it worth it?

01Why WhatsApp?

Topic

Messenger in Europe

Key point

transactional and time-critical

WhatsApp is the most widely used messenger in Europe.[1] Open rates are above 90%, while according to Klaviyo a good open rate for email campaigns in 2026 is around 31%.[10] Messages are read within minutes.

Important: WhatsApp works best for transactional and time-critical messages. For newsletters, email remains the better choice.

02Klaviyo + WhatsApp integration

Topic

native integration

Key point

Meta Business Account

Since September 2025, Klaviyo has offered WhatsApp as a dedicated channel directly in the tool.[1] This means:

• You can build WhatsApp flows directly in Klaviyo[1]
• The same segmentation and triggers as for email[2]
• Central reporting for email, SMS and WhatsApp[1]

Requirement: you need a verified Meta Business Account. You start the connection directly in Klaviyo under Settings → WhatsApp with your Facebook login.[3]

03The 4 most important use cases

Topic

four use cases

Key point

Abandoned Cart is the classic

1. Abandoned Cart

The classic use case. Someone abandons their purchase and gets a WhatsApp message with their cart 1-2 hours later.[2] The conversion rate is significantly higher than for email Abandoned Cart Flows.

2. Shipping Updates

Shipping confirmations, tracking updates, delivery notifications.[2] Customers want to know where their parcel is. WhatsApp is perfect for this because it is read immediately.

3. Flash Sales

Time-limited offers with urgency. “Today only: 20% off.” This works better via WhatsApp than via email because the message arrives instantly.

4. VIP offers

Exclusive deals for your best customers. More personal, more direct and more premium than a standard email. This works particularly well for high-AOV products.

04How much does WhatsApp marketing cost?

Topic

Costs

Key point

depends on the country

Since 1 July 2025, WhatsApp has charged per message.[11] This means: you pay for every delivered template message, and the price depends on the category and the country.[11]

Costs vary by country and category: marketing, utility (meaning order and shipping updates)[2] and authentication. Free-form replies within the customer service window are free of charge.[11] Via Klaviyo, a marketing message to Germany costs around 0.22 to 0.26 US dollars and a transactional message around 0.09 to 0.11 US dollars, depending on volume (as of October 2026).[12]

Important: when a customer messages you, a 24-hour window opens. Within it, free-form replies and utility messages are free of charge, while marketing messages are still charged individually.[11]

05GDPR: what is allowed?

Topic

Opt-in required

Key point

no cold outreach

In the EU, WhatsApp is subject to GDPR.[9] The rules are clear:

• Opt-in required: You may only message contacts who have explicitly signed up for WhatsApp messages (e.g. via a checkbox or a WhatsApp button on your website).
• No cold outreach: You may not send WhatsApp messages to contacts who have not given consent, even if you have their number.[6]
• Opt-out possible at any time: Contacts must be able to unsubscribe easily (e.g. via the STOP keyword).[7]

This is not legal advice.

06Is it worth it?

Topic

Addition to email

Key point

not a replacement for email

WhatsApp is worth it if:

• You send time-critical messages (Abandoned Cart, Shipping, Flash Sales)
• You have an engaged audience that actively uses WhatsApp
• You are willing to invest in opt-in mechanisms (e.g. a WhatsApp pop-up on your website)

WhatsApp is not a replacement for email but an addition. The combination of email (for content, newsletters, longer stories) and WhatsApp (for time-critical, transactional messages) is the strongest.

Conclusion: WhatsApp marketing works if you use it correctly. Highest open rates, native Klaviyo integration, GDPR compliant with opt-in. But: it is not suitable for everything. Use it selectively for transactional and time-critical messages, not as a spam channel.