Klaviyo

Klaviyo is a marketing automation platform built specifically for ecommerce, helping online stores turn their customer data into personalised email and SMS campaigns that reliably drive revenue. While generic email tools treat everyone on a list the same, Klaviyo's whole design revolves around the rich behavioural data an online store generates — what people browsed, bought, abandoned, and how much they've spent over time. By plugging directly into that data, it lets merchants send the right message to the right customer at the right moment, which is the difference between marketing that feels like spam and marketing that feels like a helpful nudge.

Its automations are where the real money is made. Abandoned-cart flows recover sales that would otherwise be lost; welcome series convert new subscribers; post-purchase flows drive repeat orders and reviews; and win-back campaigns re-engage lapsed customers — all triggered automatically by customer behaviour and running in the background once set up. Klaviyo combines email and SMS so you can reach customers on the channel they respond to, segments audiences with precision based on their actual actions and value, and ties every campaign back to the revenue it generated, so you always know what's working. Deep integrations with major ecommerce platforms mean it syncs store data in real time with minimal setup.

Klaviyo is the platform of choice for serious online stores — from fast-growing direct-to-consumer brands to established retailers — that treat email and SMS as major sales channels rather than afterthoughts. The reason it commands loyalty despite premium pricing is straightforward return on investment: well-built Klaviyo flows often generate a substantial share of a store's total revenue on autopilot. For any ecommerce business that wants to maximise customer lifetime value and stop leaving money on the table with generic blasts, Klaviyo provides the data, automation, and precision to make owned marketing one of its most profitable assets.