Omnisend

Omnisend is Klaviyo's most direct competitor, built from the ground up for ecommerce. It strongly emphasizes omnichannel automation, seamlessly blending email, SMS, push notifications, and even web push into a single workflow. Its pre-built automation templates for post-purchase, win-back, and abandoned carts are highly effective and easy to set up. The platform offers a great balance of power and usability, often at a slightly more accessible price point than Klaviyo for comparable features.