Klaviyo vs Omnisend: pricing, features and which to choose

Klaviyo is a B2C CRM and ecommerce marketing platform founded in 2012 by Andrew Bialecki and Ed Hallen. The company says more than 205,000 brands use its products, and it trades publicly on the New York Stock Exchange under KVYO. Its catalog includes email, mobile messaging, Reviews, Customer Hub, Helpdesk, Customer Agent, Composer, Data Platform, and Analytics. That range makes Klaviyo broader than an email sender, although ecommerce marketing remains its clearest center. Its strongest identity is a customer data and automation system for brands that sell directly to consumers online. The company says it began as a customer database, added email marketing in 2013, SMS in 2021, Reviews and a CDP in 2023, and a unified B2C CRM in 2025.

Klaviyo connects an online store and other first-party sources, then unifies customer profiles with behavioral events. Teams build segments, campaigns, and event-triggered flows, send through email or mobile channels, and measure revenue attribution. Klaviyo lists Shopify, Salesforce Commerce Cloud, and WooCommerce integrations, while its 2024 filing described more than 350 integrations as of 2023. Typical journeys include abandoned-cart reminders, post-purchase messages, replenishment prompts, and targeted promotions. Product activity and predictive analytics can influence audience selection and send timing. The system depends on clean event data and thoughtful profile design, making implementation more demanding than a basic newsletter tool. Marketers can connect browsing, purchase, engagement, and service signals to coordinated messages, then examine reported revenue.

Klaviyo’s limits are operational as well as financial. Reachable-profile growth can increase recurring costs, while separately billed products make the total harder to estimate than a single-channel plan. Its AI features require customer review, and necessary prompts or data may be sent to providers to generate requested outputs. Klaviyo says provider contracts prohibit global-model training on customer data, while its policy describes controls that depend on applicable products, settings, contracts, and provider terms. Mailchimp is broader for general small-business marketing, ActiveCampaign is a close automation alternative, and Omnisend also targets ecommerce brands. Klaviyo offers deeper behavioral ecommerce segmentation and revenue attribution than many newsletter-focused tools, but requires better data discipline and a larger budget as reachable profiles grow. Pick Klaviyo when behavioral ecommerce data, profile-based journeys, and revenue reporting matter more than the lowest setup cost.

Omnisend was founded in Lithuania in 2014, growing out of an earlier email product called Soundest, and focuses entirely on online stores. It serves small and mid-sized ecommerce brands that want email, SMS and web push in one tool without the complexity of an enterprise suite. Its main integrations are Shopify, WooCommerce, BigCommerce, Wix and other store platforms, which sync customers, orders, products and browsing events into Omnisend automatically. That store data powers the core use cases: welcome series, browse and cart abandonment, order confirmations, post-purchase follow-ups, win-back campaigns and product launches. Omnisend competes most directly with Klaviyo, often pitching itself as easier and cheaper.

The product includes a drag-and-drop email builder with ecommerce blocks for products and discounts, prebuilt automation workflows, signup forms, popups and spin-to-win wheels, web push notifications, segmentation on shopping behavior and reporting on sales generated by each campaign. Pro plan users can add SMS through a separate credits subscription. Audience syncs push segments to Facebook Custom Audiences and Google Customer Match for ads. RFM analysis groups customers by how recently, how often and how much they buy, and churn prediction flags customers at risk. Conditional content shows different blocks to different subscribers, and a product recommender inserts items based on past purchases or recently viewed products.

Omnisend's strengths are its ecommerce focus, easy prebuilt automations, a usable free plan, built-in AI writing and segmentation, and lower starting prices than Klaviyo. Its weaknesses are SMS limited to Pro since May 2026, contact-based pricing that grows with your list, fewer advanced analytics than Klaviyo and less fit for non-ecommerce businesses. Klaviyo offers deeper data and predictive analytics for larger brands. Mailchimp suits general small businesses. Brevo is cheaper for high volumes. ActiveCampaign offers more flexible automations for service and B2B companies. Choose Omnisend if you run an online store and want strong email and SMS automation without a steep learning curve.