Omnisend is the best starting point for ecommerce stores that want email and SMS automation without paying Klaviyo prices or spending weeks on setup. The free plan covers 250 contacts with full automation access, which is rare: most competitors strip automation out of their free tiers. The Standard plan at $16/month for 500 contacts is priced competitively, and the pricing curve is gentler than Klaviyo's as your list grows.
The tradeoff is depth. Omnisend's segmentation and analytics are functional but not as sophisticated as Klaviyo's predictive features. For stores in the $0-500K revenue range doing basic welcome flows, abandoned cart sequences, and post-purchase emails, Omnisend handles all of that well. Once you're running complex multi-segment campaigns with heavy personalization and want predictive analytics, Klaviyo becomes worth the extra cost.