Independent comparison for enterprise buyers. Updated March 2026.
Quick verdict: Constant Contact is the better fit for small businesses, nonprofits, and local organisations that want straightforward email and event marketing with contact-based pricing and strong support. Klaviyo is the stronger choice for ecommerce brands on Shopify, BigCommerce, and similar platforms that need behaviour-driven email and SMS flows tied to store and purchase data. The key differentiator is focus: Constant Contact optimises for general small-business email simplicity, while Klaviyo optimises for ecommerce data and revenue attribution.
| Criteria | Constant Contact | Klaviyo |
|---|---|---|
| Editorial score | 4.3 / 5.0 | 4.6 / 5.0 |
| Deployment | Multi-tenant SaaS | Multi-tenant SaaS |
| Pricing Model | Contact-based; Lite about $12/mo, Standard about $35/mo, Premium about $80/mo at 500 contacts; 15% annual discount | Active-profile based; free to 250 profiles; Email from about $20/mo at 500 contacts, about $100/mo at 5,000 |
| Target Buyer | Small businesses, nonprofits, local and event marketers | Direct-to-consumer and ecommerce brands |
| Implementation | Days, self-serve | Days to a few weeks, with store integration |
| Key strength | Ease of use, event marketing tools, and support | Ecommerce data, predictive CLV, and revenue-tracked flows |
| Key limitation | Limited advanced automation and segmentation; SMS is a US-only add-on | Cost rises sharply with list size; no annual discount; ecommerce-centric |
| Best for | Simple newsletters, events, and nonprofit outreach | Abandoned-cart and post-purchase revenue flows |
Constant Contact is a long-established email marketing tool aimed at small businesses and nonprofits. Its strengths are ease of use, a large template library, event management, surveys, and integrated social posting. Automation exists but is comparatively basic: the Lite plan offers a single automation trigger, while multi-step automations and segmentation appear on Standard and above. For organisations whose core need is sending newsletters, promotions, and event invitations without a steep learning curve, the platform is approachable and well supported.
Klaviyo is purpose-built for ecommerce. It connects directly to Shopify, BigCommerce, and other stores, pulling real-time purchase history, browsing behaviour, and order value into segmentation and automated flows. Out-of-the-box flows for abandoned cart, browse abandonment, welcome, and post-purchase are central to the product, and predictive analytics such as customer lifetime value and churn risk inform targeting. Klaviyo has expanded into SMS, WhatsApp, reviews, and analytics, positioning itself as a data hub for online retailers.
On segmentation and ecommerce intelligence, Klaviyo is significantly deeper. Its behavioural and predictive segments are tied to store events that Constant Contact does not natively capture. Constant Contact, by contrast, is simpler to operate and stronger for non-ecommerce use cases such as community organisations, events, and local services. The platforms target different buyers, and the decision usually follows whether the organisation sells online at volume.
Both handle deliverability competently and both offer SMS, though Constant Contact restricts SMS to US customers as a paid add-on, with Premium including a monthly allocation. Klaviyo's SMS is more tightly woven into its flows and segmentation. Reporting in Klaviyo is revenue-oriented, attributing sales to specific messages, while Constant Contact reporting is centred on opens, clicks, and engagement.
Constant Contact uses contact-based pricing across Lite, Standard, and Premium. Entry pricing starts around $12 per month for up to 500 contacts on Lite, with Standard near $35 and Premium near $80 at the same contact tier, scaling as the list grows. A 15 percent discount applies with annual prepayment, and nonprofits receive 30 percent off. SMS is a separate US-only add-on. The model is predictable and easy to forecast for steady contact growth.
Klaviyo prices on active profiles, meaning profiles that can be emailed, and excludes suppressed or unsubscribed contacts. A free plan covers up to 250 profiles. The Email plan runs roughly $20 per month at 500 contacts, $100 at 5,000, and $400 at 25,000, with Email and SMS bundles adding about $15 or more per month. As of 2026, self-serve Klaviyo plans bill monthly with no annual discount, so cost scales with list size. Pricing verified June 2026.
Buyers frequently note that Constant Contact is easy to learn, reliable for newsletters and events, and backed by responsive support, with nonprofits valuing the discount and the event tools. Common criticism centres on dated automation, limited segmentation, and pricing that some feel is high relative to the feature depth. Klaviyo users frequently praise the depth of ecommerce data, the quality of pre-built flows, and clear revenue attribution that ties messages to sales, with many crediting it for measurable revenue lift. Recurring complaints focus on cost that climbs quickly as lists grow, the absence of an annual discount, and a learning curve for teams new to behavioural segmentation. Across both, reviewers agree the platforms serve different needs: Constant Contact for simple, broad small-business email, and Klaviyo for data-driven ecommerce marketing where store integration is the deciding factor.
Choose Constant Contact if the organisation runs newsletters, events, or nonprofit outreach and values simplicity, predictable contact-based pricing, and hands-on support over advanced automation. Choose Klaviyo if the business sells online and needs behaviour-driven email and SMS flows tied to store and purchase data, with revenue attribution to justify spend. Retailers focused on abandoned-cart recovery, post-purchase sequences, and predictive segmentation will get more value from Klaviyo, while non-ecommerce senders rarely need its depth.
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