In Singapore, most Shopify stores leave 30–40% of total ecommerce revenue on the table — and that revenue lives in email. Not because email is hard, but because the seven flows that drive it are usually set up half-correctly, then forgotten. Welcome series with one email instead of three. Abandoned carts that fire too late. Win-backs that never fire at all.
This is the email marketing guide for Singapore Shopify and WooCommerce operators who want to fix it. It compares Klaviyo and Mailchimp at SG scale (in SGD), walks through the seven flows in priority order, and flags the SG-specific deliverability and compliance quirks that trip up overseas-built tutorials.
Klaviyo vs Mailchimp at SG scale (SGD pricing)
The honest cross-vendor comparison Singapore operators need:
| Contacts | Klaviyo (SGD/mo) | Mailchimp Standard (SGD/mo) | Brevo (SGD/mo) | MailerLite (SGD/mo) |
|---|---|---|---|---|
| 500 | ~S$30 | Free | Free | Free |
| 1,000 | ~S$40 | ~S$45 | ~S$15 | ~S$20 |
| 5,000 | ~S$130 | ~S$155 | ~S$80 | ~S$60 |
| 10,000 | ~S$240 | ~S$285 | ~S$150 | ~S$110 |
| 25,000 | ~S$540 | ~S$650 | ~S$340 | ~S$280 |
Notes:
- Prices billed in USD; SGD figures fluctuate with FX. Verify current at vendor sites.
- Klaviyo Pro adds SMS (~US$0.0125/msg in SG, plus monthly subscription).
- Mailchimp’s free tier is generous for non-ecom; ecom features locked behind Standard+.
- Brevo and MailerLite are credible cheaper alternatives but have weaker Shopify integration than Klaviyo for ecom-specific flows.
Skip if (Klaviyo): you’re under 500 contacts and not yet committed to ecommerce as your primary channel — start free on Mailchimp, migrate when you hit 1,500.
Skip if (Mailchimp): you’re a Shopify-first operator above 2,000 contacts. The conversion rate uplift from Klaviyo’s segmentation pays for itself within 60 days at this scale.
The 7 flows every SG Shopify store needs
Set these up in this priority order. Don’t try to launch all seven simultaneously — you’ll do all of them poorly.
1. Welcome series (3 emails over 7 days)
Triggered when someone subscribes (popup, footer signup, post-purchase). Email 1 (immediate): introduce the brand, deliver any opt-in incentive (discount code, lookbook). Email 2 (day 3): tell the brand story or demonstrate use case. Email 3 (day 7): scarcity-driven offer — discount code expires.
SG-specific: Reference local context. “Free shipping anywhere in Singapore” lands better than “Free shipping” alone. Mention same-day delivery if available.
2. Abandoned cart (3 emails over 24 hours)
Triggered when a checkout is started but not completed. Email 1 (1 hour): friendly reminder, no discount yet. Email 2 (24 hours): social proof or low-stock urgency. Email 3 (48 hours): final reminder with a small discount code if your margins allow.
Common mistake: discounting in Email 1 trains buyers to abandon for the discount. Hold the discount for Email 3 only.
3. Post-purchase thank-you + cross-sell (3 emails)
Triggered after order completion. Email 1 (immediate): thank you, expected delivery, what to expect. Email 2 (delivery day): “your order should arrive today, here’s how to use it.” Email 3 (day 14): cross-sell complementary products or invite to write a review.
This flow alone typically lifts repeat-purchase rate 8–15% in the first 6 months.
4. Browse abandonment (1 email after 4–24 hours)
Triggered when someone views a product 2+ times but doesn’t add to cart. Single email with the product, a related items strip, and social proof (reviews, “X bought in last 24 hours”).
5. Win-back (3 emails for customers inactive 90+ days)
Triggered for customers who haven’t purchased in 90 days. Email 1: “we miss you, here’s what’s new.” Email 2: discount code (typically 10–15%). Email 3: “this is your last chance” — increase the discount or remove from active marketing list.
6. Replenishment / repurchase
For consumable categories (skincare, supplements, F&B). Triggered N days after purchase based on typical product lifespan. “Time to reorder?” with a one-click reorder link.
7. VIP / loyalty (for top 10% LTV customers)
Manual or rules-based segment of your highest-LTV buyers. Quarterly: early access to new launches, exclusive discounts, behind-the-scenes content. This is where lifetime customer value gets compounded.
Singapore email deliverability quirks
Three things that hurt deliverability for SG-based senders that overseas tutorials don’t cover:
- .sg domain warming. New
.com.sgor.sgsending domains take longer to warm than.com. Plan for 4–6 weeks of low-volume warmup (start with 200 sends/day, ramp slowly) before pushing real volume. - Singpost vs Outlook deliverability. Outlook and Hotmail filtering for SG-based senders is stricter than Gmail. If your customer base skews older or B2B, you’ll see lower open rates on Outlook addresses. Authenticate via SPF, DKIM, and DMARC properly — Klaviyo and Mailchimp both walk you through this.
- Mobile-first rendering. ~80% of SG email opens are on mobile. Test every email on iPhone Mail and Gmail mobile app before sending. Single-column layouts, large tap targets, no tiny disclaimer text in fine print.
When WhatsApp eats email
A real question: in Singapore, where 2/3 of consumers prefer WhatsApp for business communication, does email still matter?
Yes, with adjustments:
- Transactional and post-purchase content is increasingly moving to WhatsApp (order confirmations, shipping updates) — Klaviyo SMS or a dedicated WhatsApp BSP handles this.
- Promotional content still works on email — high consent threshold, lower interruption cost. WhatsApp is too intimate for “here’s our weekly drop.”
- Lifecycle flows (welcome, abandoned cart, win-back) split by audience age: under-30s respond better to WhatsApp, over-35s to email. Run both channels with non-overlapping segments.
The combination — email for promotional and lifecycle, WhatsApp for transactional and high-urgency — typically lifts overall engagement 15–25% versus email-only.
PDPA compliance for SG email senders
Singapore’s Personal Data Protection Act applies to all marketing communications:
- Explicit consent required. Pre-checked opt-in boxes are not valid. Use clear language: “Yes, I want to receive marketing emails from [Brand].”
- Unsubscribe within 30 days of request — Klaviyo and Mailchimp both auto-process unsubscribes immediately.
- Privacy policy linked from every signup form and email footer.
- Document consent. Klaviyo and Mailchimp record consent timestamp per profile. Don’t import old lists without re-permission.
- Personal data retention. Keep customer email data only as long as needed for the stated purpose. Set up auto-suppression for profiles inactive 24+ months.
Migration path: Mailchimp to Klaviyo
If you’re moving from Mailchimp to Klaviyo (the most common SG migration), plan for 4–6 weeks:
- Week 1: Export Mailchimp lists, segments, and historical campaign data. Import to Klaviyo.
- Week 2: Rebuild flows in Klaviyo (Mailchimp’s automation logic doesn’t map 1:1).
- Week 3: Domain authentication — set up Klaviyo’s DKIM records on your sending domain.
- Week 4: Run Mailchimp + Klaviyo in parallel for one campaign to verify deliverability.
- Weeks 5–6: Cut over fully. Pause Mailchimp billing (don’t cancel until Klaviyo has 30 days of clean sending).
Don’t migrate during a peak sales month. CNY, Black Friday, and holiday December are the worst times.
Internal links and further reading
- Shopify Singapore — payment + GST setup that integrates with email flows
- WhatsApp Business API — when to layer WA on top of email
- GA4 for ecommerce — proper attribution between email, paid, and organic
Email marketing for Singapore ecommerce in 2026 is still the highest-ROI channel for most stores, but only if you set up the seven flows properly and maintain the discipline of list hygiene. Klaviyo earns its bill above 1,000 contacts. The flows pay for themselves within 60 days. The compliance work is straightforward but non-optional. Skip the work, and you’re leaving 30–40% of ecommerce revenue on the table for the SG operator who didn’t.