Building an Email List from Your WhatsApp Shop: The Mailchimp Newsletter Sync Powerup

There's a conversation in the e-commerce world about whether email is dead. The short answer is: it very much isn't.

WhatsApp commerce is fast, direct, and brilliant for completing transactions. But email has something WhatsApp doesn't: patience. An email sits in an inbox. It can be read on a commute, revisited on a lunch break, forwarded to a friend. Email is how you tell your brand's story over time.

The Mailchimp Newsletter Sync powerup connects your Whizzly checkout to your Mailchimp audience — so every customer who buys from you becomes a potential long-term subscriber, automatically.

How It Works

The integration is opt-in by design. We're not silently adding people to marketing lists — that would be both unethical and illegal under UK GDPR.

Instead, a clean, optional checkbox appears in your checkout flow:

☑ "Subscribe to receive updates, new products, and exclusive offers from [Your Shop Name]"

Customers who tick this box have their name and email address automatically synced to the Mailchimp audience of your choice. They're tagged with a custom tag (e.g., whizzly-customer) so you can segment them from manually added subscribers.

Customers who don't tick the box are never added. Simple.

What You Can Do With Your Email List

Once you have subscribers in Mailchimp, the creative possibilities open up:

New collection launches: When you add a new product line or seasonal range, send a beautiful visual email before you post it anywhere else. Make your subscribers feel like VIPs.

Behind-the-scenes newsletters: Talk about your process, your suppliers, why you started your business. This kind of content builds genuine connection and trust — and it converts.

Seasonal promotions: Christmas, Valentine's Day, Mother's Day — planned email campaigns around these moments can drive meaningful sales spikes.

Restock announcements: When something that sold out is back in stock, your email list is the first place to announce it.

Loyalty and referral nudges: Remind customers about your stamp card, referral scheme, or current promotions.

Why Mailchimp?

Mailchimp is the world's most widely used email marketing platform with a genuinely generous free tier (up to 500 contacts, 1,000 sends/month). We chose it for the integration because it's where most small businesses already are.

If you use a different platform, let us know — we track integration requests and prioritise based on what our merchants actually need.

Setting It Up

1. If you don't have one, create a free Mailchimp account at mailchimp.com
2. In Mailchimp, generate an API key (Account → Extras → API keys)
3. Find your Audience ID (Audience → Settings → Audience name and defaults)
4. In your Whizzly Dashboard → Powerups → Mailchimp Newsletter Checkout Sync, paste both values and save

The opt-in checkbox will appear in your checkout from the next visit. That's it.

This powerup is free on Whizzly Pro, or available as a modular add-on on Starter.