At some point, most ecommerce store owners have the same uncomfortable conversation with themselves. They look at their email campaign stats - decent open rates, a click-through rate in the low single digits - and wonder if they're getting the most out of the channel or just doing what they've always done.
Email has been the default for so long that questioning it almost feels disloyal. It's cost-effective. The tooling is mature. Every ecommerce platform integrates with it natively. And it does generate revenue - Omnisend's most recent data puts email's ROI for US ecommerce brands at around $68 for every dollar spent.
But the question worth asking isn't whether email works in absolute terms. It's whether email is still the right channel for the specific jobs we keep assigning it - particularly the ones that require speed, two-way conversation, or reaching customers who have started to tune out their inboxes. Because on those dimensions, the comparison with WhatsApp has become genuinely uncomfortable for email defenders.
The Numbers, Without the Spin
Most comparisons lead with the open rate gap, and for good reason - it's striking. WhatsApp messages have a 98% open rate. Email, for ecommerce specifically, sits around 26–31% based on Omnisend's ecommerce-focused benchmarks. The higher figures you sometimes see (up to 43%) are partly inflated by Apple's Mail Privacy Protection, which preloads email content even when no one actually reads it.
So even being generous with email, you're looking at roughly a 3-to-1 gap in whether the message gets seen at all. After that, the divergence gets wider:
- Click-through rates on WhatsApp marketing messages: 45–60%
- Email CTR across industries: 2.09–2.62%
- Average WhatsApp response time: 45 seconds
- Average email response time: hours to days
For every 1,000 people who receive a WhatsApp message from your store, somewhere between 450 and 600 click through to something. For email, you're looking at roughly 20 to 26.
Why Email's Numbers Look Better Than They Are
The open rate problem with email is actually two separate problems. The first is the inflation problem already mentioned - Apple Mail accounts for roughly 46% of all email clients, and its preloading behavior has pushed reported open rates up significantly. The more honest engagement metric for email is click-through rate. And CTR sits around 2%.
The second problem is deliverability. Nearly 1 in 6 marketing emails never reaches the inbox at all, according to EmailTooltester's research. They land in spam, in the promotions tab, or get blocked entirely. WhatsApp doesn't have this problem - messages sent through the Business API go directly into the chat interface, in the same stream as messages from friends and family. No spam filter to clear, no promotions tab to bypass.
What WhatsApp Is Actually Better At
Cart abandonment recovery is the most discussed example, and the data is consistent across sources. Email recovery sequences bring back somewhere between 3–8% of abandoned carts. WhatsApp recovery messages, sent within 10–15 minutes of abandonment with a product image and a direct checkout link, achieve recovery rates in the 18–30% range. That's not a modest improvement - it's the kind of gap that changes how you think about the channel.
Flash sales and limited-time offers are another area where WhatsApp's speed matters structurally. A promotional email for a 4-hour sale might get opened 6 hours after the sale ended. A WhatsApp message for the same sale lands in under 3 minutes on average and gets read almost immediately.
Order and shipping notifications perform noticeably better on WhatsApp than email because they arrive where people already expect personal, real-time updates. Research from Infobip found that 90% of WhatsApp messages are read within 3 minutes of delivery.
Pre-purchase questions and customer support. When a shopper has a question about sizing, compatibility, or lead time and sends a WhatsApp message, they typically get an answer before they've had time to go look somewhere else. That's a conversion that would otherwise have been a bounce.
This is exactly where ChatCart Pro makes its impact: by placing a WhatsApp button on your WooCommerce product pages, cart, and checkout, you give customers the immediate two-way channel that captures both pre-purchase questions and recovery opportunities in a single integration.
What Email Is Actually Better At
Content depth. A newsletter that takes 400 words to make a case for a product, includes a comparison table, links to three reviews, and ends with a customer story - that exists naturally in an email format. The same content in a WhatsApp message would feel wildly out of place.
Cost at scale. The WhatsApp Business API charges per conversation. For large-scale broadcasts to tens of thousands of contacts, the cost calculus can shift in email's favor. Email platforms typically charge a flat monthly fee regardless of send volume.
Segmentation and analytics maturity. Email platforms have had years to develop deep segmentation tools - behavioral triggers, purchase history targeting, predictive send-time optimization, A/B testing infrastructure. WhatsApp marketing tooling is catching up, but email still has more mature options for complex audience segmentation.
Formal communication. An invoice, a detailed policy update, a post-purchase review request with a long explanation - these are natural email content. Sending them on WhatsApp would feel off. Channel fit matters in both directions.
How the Two Channels Actually Work Together
Most stores that are doing this well aren't treating it as a binary choice. They're mapping each channel to the moments where it naturally fits.
The pattern that shows up most often: email handles the top of the funnel and the content-heavy touchpoints - welcome sequences, brand newsletters, product launches with context, post-purchase review requests. WhatsApp handles the time-sensitive and conversational moments - order confirmations, shipping updates, cart recovery, flash sale alerts, pre-purchase questions.
A concrete version of this: a customer subscribes via email, gets a welcome sequence, clicks through to the store, adds something to their cart, opts into WhatsApp notifications at checkout, immediately gets an order confirmation on WhatsApp, gets a shipping update the next day on WhatsApp, and then receives a review request email a week after delivery. Each channel is doing what it's structurally suited for.
Related: Why WooCommerce Customers Abandon Checkout - And How WhatsApp Brings Them Back - a full breakdown of why carts are abandoned and what actually recovers them at meaningful scale.
A Few Things the Comparison Articles Don't Usually Mention
Meta controls WhatsApp. In April 2025, Meta paused the ability to send marketing template messages to US phone numbers as part of an anti-spam quality push. It affected businesses that had built significant parts of their marketing around WhatsApp US broadcasts. The restriction was specific to the US and to marketing-category templates - transactional and service messages were unaffected - but it was a reminder that the channel operates on someone else's infrastructure, under rules that can change.
The consent question is stricter for WhatsApp than email in ways that some businesses learn the hard way. WhatsApp Business requires explicit, documented opt-in before you can send any business-initiated message. You can't import a phone list and start messaging. If a customer's block rate climbs too high, Meta can suspend the account. The upside of that strictness is that the channel stays high-signal - which is precisely why the open and response rates are what they are.
So, Which Gets More Responses?
WhatsApp gets more responses by every direct engagement metric - open rates, click-through rates, reply rates, and response time. For the specific jobs of cart recovery, transactional updates, time-sensitive promotions, and real-time customer support, there's no honest reading of the available data that puts email ahead.
But "more responses" isn't always the only thing that matters. Email gets more revenue per dollar spent at scale. Email is better for content depth. Email is the right channel for formal communication and for audiences where WhatsApp isn't the primary messaging platform.
The store that treats this as an either/or question and picks one is leaving something on the table regardless of which one they pick. The more productive question: which messages do I currently send via email that would perform dramatically better on WhatsApp, and how do I start moving them there? For most WooCommerce stores, the honest answer is: cart recovery sequences, order and shipping notifications, and flash sale alerts.
Ready to add WhatsApp to your WooCommerce store? ChatCart Pro places a WhatsApp button on every stage of your checkout flow and creates real orders automatically - the easiest way to start capturing WhatsApp conversations at the moment of purchase intent.
Also read: Multi-Number WhatsApp Routing for WooCommerce Stores With Multiple Product Lines - when your store grows beyond a single WhatsApp number and how to structure the routing.
