We get this question a lot: "Why Klaviyo? Why not Mailchimp?"
It's a fair question. Mailchimp is the most recognisable email marketing brand in the world. It's been around forever, it's easy to use, and it has a generous free tier.
But Gather integrates with Klaviyo, not Mailchimp. Here's why.
Mailchimp Is a Newsletter Tool
Mailchimp was built for sending newsletters. It does that well. You write an email, pick a list, hit send. Simple.
But retail marketing in 2026 isn't about newsletters. It's about automated, data-driven flows that respond to individual customer behaviour.
When someone buys their third product from you in two months, you don't want to send them the same email as someone who hasn't visited in a year. You want completely different messaging, different offers, different timing.
Mailchimp can technically do some of this. But it wasn't designed for it, and it shows.
Klaviyo Was Built for Commerce
Klaviyo's entire architecture is built around customer events and transactions. Every feature assumes you're working with purchase data:
- Segmentation is based on purchase behaviour by default (spent X in Y days, bought product Z, purchase frequency)
- Flows trigger off real commerce events (placed order, fulfilled order, refund issued)
- Predictive analytics forecasts next purchase date, lifetime value, and churn risk
- Revenue attribution shows exactly which emails and flows drove which sales
This isn't a bolt-on feature set. It's the foundation of the platform.
The Numbers
Klaviyo publishes benchmark data across their customer base:
- Average revenue per recipient is 3-8x higher than industry averages for batch campaigns
- Automated flows typically generate 30-50% of total email revenue for mature accounts
- Predictive segments (like "likely to churn in 30 days") have recovery rates 2-4x higher than static lists
Mailchimp doesn't publish comparable commerce-specific benchmarks because their platform isn't optimised for it.
What This Means for Lightspeed Retailers
If you're running a physical retail store on Lightspeed, your most valuable marketing asset is your customer purchase data. The platform you pipe that data into needs to understand commerce natively.
Klaviyo speaks the language of transactions, products, and customer lifecycle stages. Mailchimp speaks the language of lists, campaigns, and open rates.
Both are valid. But for a retailer trying to drive repeat purchases, increase average order value, and reduce customer churn, Klaviyo is the better tool for the job.
The Integration Matters
The gap between "Klaviyo can do this" and "Klaviyo is doing this for your store" is the data connection.
Without real-time POS data flowing in, Klaviyo is just another email tool. With it, every automation, every segment, every personalised recommendation is powered by actual customer behaviour.
Gather bridges that gap. Your Lightspeed transactions sync to Klaviyo automatically, so every flow and segment is always working with current data.
Our Recommendation
If you're doing less than $500k/year in revenue and just need to send a monthly newsletter, Mailchimp is fine. Save the money.
If you're a serious retail operation that wants to build a retention engine, drive repeat purchases, and actually use your customer data for personalised marketing, Klaviyo is the clear choice.
And if you're on Lightspeed, Gather makes the connection effortless.