Mailchimp vs Klaviyo for Singapore Businesses: How to Actually Choose

Last updated: 29 August 2026. Written by Adrian Tan, Singapore Digital Marketing (SDM).

Nearly every Mailchimp versus Klaviyo comparison you can find answers the same question: which one has better automations. It is not a bad question, but for a Singapore business it is nowhere near the most important one, and it is not the question that determines whether the decision turns out to have been right eighteen months later.

Three things do. The two products have genuinely different data models, and the wrong one makes the reports you need impossible rather than merely awkward. They bill on different units, and the difference shows up in Singapore dollars against a list you have not cleaned. And both of them leave a specific set of Singapore legal duties entirely to you — duties that live in the Spam Control Act 2007 rather than in the PDPA, which is why most local checklists miss them.

This piece works through all three, then gives three worked Singapore scenarios. If you have not settled the strategy underneath the tool, read our email marketing guide for Singapore first — the platform is the last decision, not the first.

The one-line answer, then the reasoning

If you sell products online and the value of the channel comes from behaviour — what someone browsed, abandoned, bought, and how long ago — Klaviyo is built for that and Mailchimp is retrofitted for it. If your email is broadcast-shaped — a newsletter, an announcement, a monthly update to a list of humans who are not transacting on your site — Mailchimp does that job at lower cost and with less setup, and Klaviyo’s advantages are largely wasted.

That is the whole recommendation. Everything below is how to check whether it applies to you, and what it costs to be wrong.

The data models are different, and that is the real decision

Mailchimp is fundamentally audience-and-list shaped. Contacts sit in an audience; you segment them by fields on the contact record and by past campaign engagement. Plans cap the number of audiences you may have — one on Free, three on Essentials, five on Standard, unlimited on Premium — which tells you a lot about how the product expects you to think.

Klaviyo is profile-and-event shaped. A profile accumulates a timeline of events — viewed product, added to cart, placed order, refunded — and segments are queries over that timeline. Klaviyo bills on “active profiles”, which it defines as contacts who may receive marketing emails.

That distinction sounds academic until you try to write a segment. “Everyone who opened the last newsletter” is easy in either. “Everyone who viewed a product in the moisturiser category twice in the last fortnight, has never bought, and is not already in the winback flow” is native to one model and a data export plus a spreadsheet in the other.

The honest test is not what you would like to do. It is what you have actually done in the last six months. If nobody in the business has asked for a behaviour-based segment, the product built for behaviour-based segments will be expensive shelfware.

What you are actually billed for

Mailchimp publishes fixed tiers against contact bands, and — a genuinely useful detail for a Singapore buyer — its pricing page offers a SGD currency option alongside USD. At the time of writing, the Standard plan is shown starting at S$25 per month at the 0–500 contact band, and the Essentials plan at US$15 per month at the same band. The Free plan is positioned for businesses with fewer than 250 contacts. Discounts published on the same page include 15% for nonprofits and charities, and 15% off for twelve months on 10,000+ contacts. A Pay As You Go email credit option exists for infrequent senders.

The feature and volume differences at that entry band are worth seeing side by side, because the jump people actually care about is Essentials to Standard.

Figures as displayed on Mailchimp’s Marketing pricing page at the 0–500 contact band, retrieved 29 August 2026. Overages apply if contact or send limits are exceeded.

Klaviyo does not publish an equivalent fixed table. Its pricing page is a build-your-plan calculator quoted in USD, spanning Marketing, Data + Analytics, Service and other modules, with the total driven by active profiles and channel mix. Its free plan is precise and worth knowing: up to 250 active profiles, 500 email sends per month, US$5 of mobile messages per month, 10,000 Composer credits, built-in reporting, and email support for the first 60 days. Exceeding 250 active profiles or 500 monthly emails restricts your ability to send until you upgrade.

Because the paid figure depends on a configuration only you can specify, price Klaviyo yourself on the day you decide, with your real profile count. Any table in a blog post — including this one — would be out of date before you read it.

Two Singapore-specific cost points that the global comparisons never mention:

The active-profile trap. Klaviyo’s billing unit is profiles who may receive marketing email. A list that has been accumulating unengaged addresses for four years is not just a deliverability problem, it is a direct monthly cost. On a list-based tool, an unengaged contact costs you a slot in a band; on a profile-based tool, it costs you every month until you suppress it. Whichever you choose, the sunset policy — suppress anyone who has not opened in twelve months — pays for itself faster in Singapore than most operators expect, because local list sizes are small and the bands are coarse.

GST on a USD invoice. Under Singapore’s Overseas Vendor Registration regime, GST applies to imported digital services supplied to non-GST-registered customers in Singapore — a regime in force for digital services since 1 January 2020 and extended from 1 January 2023 to all remote services and low-value goods. Software and cloud services are in scope, at the prevailing 9% rate. If your business is not GST-registered, budget the subscription with GST included; if it is, the treatment differs and your accountant should confirm it. Either way, a USD-denominated subscription also carries an FX line that an SGD-denominated one does not.

The Singapore compliance layer that neither tool does for you

This is the section that has no equivalent in an American comparison, and it is the one most likely to cost a Singapore business real money.

Start with a clarification that saves a lot of confusion: the PDPA’s Do Not Call provisions apply to Singapore telephone numbers — voice calls, text and fax messages. They are not the rulebook for email. Email marketing sits under the Spam Control Act 2007, whose obligations sit alongside the PDPA’s consent, purpose limitation and withdrawal-of-consent duties rather than replacing them.

Several features of the Act catch people out.

Publishing your address is not consent. Section 5(2) states that a recipient is not treated as having requested or consented to a message merely because their electronic address was given or published by or on behalf of them. Scraping the contact page of every SME on a directory does not produce a consented list. It produces a list of unsolicited recipients.

“In bulk” starts lower than you think. Section 6 deems messages sent in bulk where a person sends, causes to be sent, or authorises more than 100 messages with the same or similar subject matter in 24 hours, more than 1,000 in 30 days, or more than 10,000 in a year. A single modest send to a Singapore SME list clears the first threshold comfortably.

The Act reaches instant messaging. Section 4A addresses messages sent to instant messaging accounts, and section 4(3) carves out only voice calls made using a telephone service. If your platform is sending anything other than email, check the scope rather than assuming.

The Singapore link is broad. Section 7 applies the Act where the message originates in Singapore, or the sender is physically in Singapore or is an entity formed here or with an office or place of business here, or the device used to access the message is in Singapore, or the recipient is in Singapore or is an entity carrying on business here. A Singapore company sending to an overseas list, and an overseas company sending to a Singapore list, are both capable of being caught.

Letting someone else advertise you is authorising it. Section 3(4) deems a person who knowingly allows their product or service to be advertised by a sender to have authorised the sending — unless, under section 3(5), they take reasonable steps to stop it. Affiliate and reseller programmes are the obvious exposure.

Then the Second Schedule, which is the operational checklist. For unsolicited commercial electronic messages it requires, among other things:

• An unsubscribe facility — an email address, Internet location address, telephone number, fax number or postal address the recipient may use — plus a statement to that effect. Where the message arrives by email, an email address for unsubscribe requests must be included.
• That statement presented in a clear and conspicuous manner, and in English — where two or more languages are used, English must be one of them.
• The unsubscribe address to be valid and capable of receiving the recipient’s request, and a reasonable number of similar requests from others, at all times for at least 30 days after the message is sent — and to have been legitimately obtained.
• No further unsolicited commercial messages after the expiry of 10 business days from the day the unsubscribe request is submitted.
• Information contained in an unsubscribe request not to be disclosed to anyone else without consent.
• A subject-field title that is not false or misleading as to the content of the message.
• The letters “<ADV>” with a space before the title in the subject field — or, where there is no subject field, in the words first appearing in the message — to clearly identify the message as an advertisement.
• Header information that is not false or misleading, and an accurate, functional email address or telephone number by which the sender can be readily contacted.

Note the qualifier running through all of that: these are requirements for unsolicited commercial messages. The cleanest way to stay out of the whole regime is to make your list genuinely solicited — explicit, recorded consent at the point of capture — and to treat the <ADV> prefix as the fallback for anything that is not. Neither Mailchimp nor Klaviyo will apply that prefix, police your consent records or track the 10-business-day clock. Both give you an unsubscribe merge tag and a footer; the rest is yours.

Three Singapore scenarios

A Shopify skincare brand doing S$80k a month. Klaviyo, without much hesitation. The revenue in this business comes from browse abandonment, cart abandonment, post-purchase and replenishment flows, all of which are event-shaped. The active-profile billing is a fair trade for that, provided you run a sunset policy from day one. Pair it with the work in reducing cart abandonment and e-commerce CRO — the flows only pay if the checkout does.

A B2B services firm with 2,000 contacts and a monthly insight email. Mailchimp Standard, and probably nothing more for two years. There are no purchase events to segment on, the value is in the writing rather than the automation, and SGD billing keeps the finance conversation short. The tool is not the constraint here; the publishing cadence is, which is why repurposing content is the higher-leverage investment.

A multi-outlet F&B group with a loyalty programme. This one genuinely depends. If loyalty data flows into the email platform as events — visits, spend, last-visited outlet — Klaviyo’s model earns its cost. If the loyalty vendor holds the data and exports a CSV once a quarter, you have a list, not a timeline, and you are paying profile-based pricing for list-based capability. Check the integration before the plan.

Migration: what actually breaks

Moving between the two is not hard, but four things reliably go wrong, and they are worth planning for rather than discovering.

Engagement history does not travel cleanly. Opens and clicks are stored differently, and “has not opened in 12 months” on the old platform will not reconstruct itself on the new one. Export your suppression and unengaged lists before you migrate and import them as suppressions, or you will start warming up an IP by mailing your worst addresses.

Consent records are not part of the export. The date, source and wording of the consent are what matter under the PDPA and the Spam Control Act, and they usually live in a signup form configuration rather than in the contact export. Screenshot and archive the form settings before you decommission the old account.

Sending reputation resets. A new platform means new sending infrastructure. Start with your most engaged segment and expand over two to three weeks; do not send to the whole list on day one because the new tool is exciting.

Your tracking parameters change. Both tools append their own campaign parameters by default and the conventions differ, which will fragment your reporting at exactly the moment you are trying to prove the migration was worth it. Fix the naming convention first — our guide to UTM tags has the scheme we use.

Frequently asked questions

Is Mailchimp or Klaviyo cheaper in Singapore?

For a small list sending broadcasts, Mailchimp is generally cheaper and it publishes fixed tiers, with the Standard plan shown starting at S$25 per month at the 0–500 contact band and a SGD currency option on its pricing page. Klaviyo prices through a build-your-plan calculator in USD driven by active profiles and channel mix, so it must be priced against your own numbers. Add the 9% GST position for imported digital services and, for USD billing, an FX cost.

Does the PDPA’s Do Not Call Registry apply to email marketing?

No. The Do Not Call provisions apply to marketing messages sent to Singapore telephone numbers — voice calls, text and fax. Email marketing is governed by the Spam Control Act 2007, which sits alongside the PDPA’s consent, purpose limitation and withdrawal-of-consent obligations. Both matter; they are different instruments.

Do we have to put <ADV> in our subject lines?

The Second Schedule to the Spam Control Act requires every unsolicited commercial electronic message to carry the letters “<ADV>” with a space before the title in the subject field, or in the words first appearing in the message where there is no subject field. The cleanest answer is to build a genuinely solicited list, with explicit recorded consent at capture. Where a send is unsolicited, the prefix applies — and neither Mailchimp nor Klaviyo will add it for you.

How quickly must we honour an unsubscribe?

Under the Second Schedule, no further unsolicited commercial electronic messages may be sent after the expiry of 10 business days from the day the unsubscribe request was submitted. Separately, the unsubscribe address must remain valid and capable of receiving requests for at least 30 days after the message is sent. Both platforms suppress automatically; the risk sits in exported lists and CRM syncs that bypass the suppression.

Can we email a list we bought or scraped?

Section 5(2) of the Spam Control Act is explicit that a recipient is not treated as having consented merely because their address was given or published by or on behalf of them. A scraped or purchased list is a list of unsolicited recipients, and the bulk thresholds in section 6 — more than 100 messages with the same or similar subject matter in 24 hours — are low enough that a single send clears them. It is also the fastest way to damage a new sending domain.

Which one should we pick if we might move to e-commerce later?

Pick for the next twelve months. Migration between the two is a week of careful work, not a rebuild, and paying profile-based pricing for two years against a capability you are not using costs more than the migration will. The exception is if the store is already scoped and funded — then start where you are going to end up.

Where this leaves you

The comparison that matters is not feature by feature. It is whether your value comes from behaviour or from broadcast, whether your list is clean enough to survive profile-based billing, and whether you have the Singapore compliance layer built as a process rather than assumed as a platform feature. Answer those three and the tool chooses itself.

Then spend your remaining attention on the things that actually move email revenue in Singapore: a list built on real consent, a sunset policy, a subject line worth opening, and a send cadence you can hold. Our email marketing guide covers those, PDPA and marketing tracking covers the data side, and the case studies show what the reporting looks like when it is done properly.

If you would rather have the strategy, the flows and the compliance process set up once and handed over working, that is what our content marketing service does. The content marketing pillar is the wider framework, and if the store itself is still being decided, WordPress vs Shopify vs Wix is the companion decision.

Pricing and plan details were retrieved from the vendors’ own pricing pages on 29 August 2026 and change without notice — check them before you commit. This article summarises publicly available material for planning purposes and is not legal or tax advice.