Is Sailthru better for large brands?

For enterprise personalisation across multiple channels and content types, Sailthru has deeper capabilities. For eCommerce-specific revenue generation, Klaviyo matches or exceeds it with less complexity.

Migration difficulty?

Sailthru-to-Klaviyo migration is straightforward for data. Complex personalisation logic may need rebuilding in Klaviyo's framework. Typical timeline: 4-6 weeks.

Klaviyo is significantly less expensive for most eCommerce brands. Sailthru's enterprise pricing reflects its broader capability set.

Can Klaviyo handle large lists?

Yes. Klaviyo handles accounts with millions of profiles. Performance and features scale with list size.

Which has better deliverability?

Both strong. Deliverability depends on your sending practices more than the platform.

Email Platform Comparison

Sailthru's personalisation is enterprise-grade. Klaviyo's personalisation is eCommerce-grade. For selling products, the distinction matters.

Sailthru (now part of Marigold) is an enterprise personalisation platform built for large media and retail companies. Its personalisation engine, content recommendations, and cross-channel capabilities are genuinely sophisticated.

Klaviyo is purpose-built for eCommerce. Shopify-native data, predicted LTV, browse abandonment, and revenue attribution — all designed around selling products online. Less enterprise complexity, more eCommerce specificity.

150+

Brands Managed

$23M+

Revenue Driven

Gold

Klaviyo Partner

30-40%

Email Revenue Target

If you are evaluating Sailthru, you are likely a larger brand with sophisticated personalisation needs. This comparison helps you decide whether Klaviyo's eCommerce focus meets those needs.

Klaviyo vs Sailthru — feature by feature

Feature	Klaviyo	Sailthru
Personalisation	eCommerce-focused personalisation. Product recommendations, predicted LTV, and behavioural segmentation from Shopify data.	Advanced personalisation engine. Content-level personalisation, interest-based recommendations, and machine learning across channels.
Shopify Integration	Deep native integration. Real-time data sync, browse tracking, and product catalog.	Integration available but not native to Shopify. Requires more setup and maintenance.
Pricing	Transparent pricing based on profiles. Accessible for growing brands.	Enterprise pricing. Custom contracts. Generally positioned for larger budgets.
Ease of Use	Intuitive for eCommerce marketers. Faster time-to-value.	Powerful but complex. Requires technical resources for full utilisation.
SMS	Built-in SMS in unified platform.	Cross-channel capabilities including SMS, push, and web.
Revenue Attribution	Revenue tracked per email, per flow, per campaign. eCommerce-native reporting.	Reporting available but requires more configuration for eCommerce-specific attribution.

Our recommendation

For Shopify eCommerce brands: Klaviyo. Faster setup, native Shopify data, and eCommerce-specific features deliver results in weeks, not months.

For large multi-brand retailers with complex personalisation across content, email, and web: Sailthru's enterprise personalisation engine may justify the additional complexity and cost.

Pick Klaviyo if...

Pick Klaviyo for eCommerce on Shopify where speed-to-revenue and native Shopify integration matter most.

Pick Sailthru if...

Pick Sailthru for enterprise retail with sophisticated personalisation needs across content, email, and web — and the technical resources to configure it.

Questions our best clients asked first

Which platform will drive more revenue for your store?

Free email audit. We review your setup and recommend the platform that fits your eCommerce business.

Pick a Time

15 minutes. No pitch deck. Just your data and our honest take.

More comparisons

Email Platform Comparison

Listrak is a solid retail ESP. Klaviyo is a revenue engine for eCommerce. The difference is where each platform's depth lies.

Klaviyo vs Listrak — Shopify-native vs. retail-focused enterprise ESP. Comparison for eCommerce brands choosing between them.

Learn more

Email Platform Comparison

Dotdigital does a lot of things well. Klaviyo does one thing brilliantly: make eCommerce brands money from email.

Klaviyo vs Dotdigital — eCommerce-native platform vs. enterprise marketing suite. Which drives more revenue for product-selling brands?

Learn more

Email Platform Comparison

Is your email platform a feature of another product, or a product itself? For revenue-critical channels, that distinction matters.

Klaviyo vs Yotpo Email — dedicated email platform vs. email bundled with reviews/loyalty. Which one drives more revenue?

Learn more

Klaviyo Audit

Your Klaviyo account is probably leaving 30-50% of its potential revenue on the table. Let us show you where.

Free Klaviyo audit from a Gold Partner. We analyze your flows, segments, deliverability, and revenue attribution — then tell you exactly what to fix. 150+ brands audited.

Learn more

Not sure which to pick?

Book a free call

Book Call