Constant Contact vs Klaviyo: Which Is Better in 2026?
Klaviyo outperforms Constant Contact for revenue-focused ecommerce automation Klaviyo wins
Klaviyo is the better choice for ecommerce businesses prioritizing revenue attribution and behavior-triggered automation. Its profile-based architecture, native Shopify integration with purchase-triggered flows, and per-campaign revenue tracking deliver measurable ROI. Constant Contact's list-based model and limited automation templates suit small nonprofits and service firms, but lack the ecommerce sophistication Klaviyo provides.
Key Differences at a Glance
| Feature | Constant Contact | Klaviyo |
|---|---|---|
| Transactional Email & API Sending | No | Yes Transactional-style flows (order confirmations, shipping updates) via automation; no dedicated transactional SMTP relay product separate from marketing emails. |
Verdict Scores — How we score →
Feature Comparison
| Feature | Constant Contact | Klaviyo |
|---|---|---|
| Transactional Email & API Sending | No | Yes Transactional-style flows (order confirmations, shipping updates) via automation; no dedicated transactional SMTP relay product separate from marketing emails. |
| A/B & Multivariate Testing | Yes Subject line A/B testing on Standard+ only; no multivariate testing; engagement heat maps available on Standard+. | Yes A/B and multivariate campaign testing; automated winner-sending to each subscriber individually via Campaigns AI; Smart Send Time optimization. |
| AI-Powered Features | Yes AI copy generator and subject line recommendations on all paid plans; AI campaign builder on Standard+; no native send-time optimization. | Yes K:AI suite includes Smart Send Time, AI subject lines, Flows AI, Campaigns AI for per-subscriber winner selection, predictive segmentation, and AI Customer Agent. |
| Audience Segmentation & Personalization | Yes 1 custom segment on Lite, 10 on Standard, unlimited on Premium; engagement and behavioral segmentation on Standard+; ecommerce segmentation on Premium. | Yes Real-time dynamic segments using any data point across all time; 350+ integration data sources; AI-suggested segments; personalized product recommendations in emails. |
| Contact & List Management | Yes List-based architecture; CSV import and 300+ integrations including Shopify; web sign-up forms on all plans; send limits at 10xΓÇô24x contact count. | Yes Profile-based architecture (not list-based); CSV import, API, and 350+ integrations; active profile limit determines pricing; suppression and compliance tools. |
| Deliverability & Spam Tools | Yes 97% inbox delivery rate; DKIM/SPF authentication support; SafeUnsubscribe on all emails; inbox preview as $10/mo add-on. | Yes Automated sending reputation repair; Smart Send Time; DKIM/SPF/DMARC authentication; dedicated IP available on Enterprise plans. |
| E-Commerce & CRM Integrations | Yes Native Shopify integration; 300+ integrations including WooCommerce via Zapier; abandoned cart and ecommerce automation templates on Premium. | Yes Native Shopify, WooCommerce, BigCommerce integrations; purchase-triggered flows; per-campaign revenue attribution; built-in B2C CRM with full customer profiles. |
| Email Builder & Templates | Yes Drag-and-drop editor with 300+ industry-specific templates; AI content recommendations and BrandKit on Standard+; dynamic content blocks on Premium only. | Yes Drag-and-drop editor plus HTML; 160+ customizable templates; AI-generated on-brand templates and subject lines; mobile-responsive previews. |
| Landing Pages & Signup Forms | Yes Web sign-up forms on all plans; landing page builder is not explicitly listed as a native feature ΓÇö events and payment pages available instead. | Yes 70+ customizable web form templates (popup, embedded, flyout); no standalone landing page builder; forms with A/B testing and AI-optimized display timing. |
| Marketing Automation & Workflows | Yes 1 automation template on Lite; 3 templates plus AI campaign builder on Standard; unlimited custom automations and ecommerce templates on Premium. | Yes Flows (visual automation builder) with unlimited steps; behavior, purchase, and date-based triggers; Flows AI for faster setup; cross-channel flows (email + SMS + push). |
| Multi-Channel Campaigns (SMS, Push, Social) | Yes SMS campaigns available as add-on from $10/mo on Lite and Standard; 500 SMS/mo included on Premium; native social posting and scheduling on all plans. | Yes Native SMS marketing (credit-based, 20+ countries); mobile app push notifications; K:AI Customer Agent for 24/7 automated conversations; no native social posting. |
| Reporting & Analytics | Yes Basic open/click reporting on Lite; advanced drilldown reporting and engagement heat maps on Standard+; revenue reporting on Premium. | Yes Built-in multi-channel revenue attribution (last-touch); email campaign performance metrics; customer lifetime value and product analytics dashboards; benchmarks by industry. |
Highlighted rows indicate features where the tools differ.
Pros & Cons
Based on G2 reviews. Source: our review methodology.
Constant Contact
Klaviyo
Pricing
Constant Contact
| Plan | Monthly | Annual |
|---|---|---|
| Starter | $12/mo | $10/mo |
| Growth | $35/mo | $30/mo |
| Pro | $80/mo | $68/mo |
Klaviyo
| Plan | Monthly | Annual |
|---|---|---|
| Free | Free | Free |
| Starter | $30/mo | $30/mo |
| Growth | $45/mo | $45/mo |
| Enterprise | Custom | — |
Ratings & Reviews
Who Should Choose Which?
You are a small ecommerce brand selling on Shopify with 500ΓÇô2,000 customers. You need to automate abandoned cart recovery, post-purchase upsells, and customer lifecycle campaigns. Klaviyo's native Shopify integration, purchase-triggered flows, and revenue attribution dashboard let you measure which campaigns drive sales. Its AI-powered Smart Send Time and per-subscriber A/B testing winner selection optimize delivery and engagement without manual effort. The free tier lets you start with 250 active profiles before paying $30/mo.
You are a nonprofit or service-based business managing a small email list (under 500 contacts) with limited budget. You need simple email newsletters, social media posting, and basic automation templates. Constant Contact's drag-and-drop editor, 300+ templates, and $20/mo entry price fit tight budgets. Its built-in social posting and helpful support make it accessible for admin teams without marketing expertise. However, you'll hit feature limits if you scale beyond 500 contacts or need advanced segmentation.
Bottom Line
Klaviyo is the better choice for ecommerce businesses that need revenue-driven automation and Shopify integration.
Related Comparisons
Frequently Asked Questions
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Is Constant Contact better than Klaviyo?
No. Klaviyo is the stronger choice for most businesses. It offers a free tier, a 4.6 G2 rating versus Constant Contact's 4.1, native revenue attribution, and AI-powered automation that delivers better ROI for ecommerce teams at a comparable $30/mo starting price.
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What are the key pricing differences between Constant Contact and Klaviyo?
Constant Contact's entry point is $20/mo (Starter plan) with a 500-contact limit and 1 automation template. Klaviyo's free tier accommodates up to 250 active profiles with 500 email sends monthly, making it zero-cost to start. Klaviyo's paid Starter plan begins at $30/mo for 501ΓÇô1,000 profiles with unlimited flows and full segmentation. Constant Contact charges per contact count, while Klaviyo charges per active profileΓÇöa meaningful distinction for ecommerce. Constant Contact's top tier ($80/mo) includes 500 SMS/mo; Klaviyo's SMS is an add-on. For small businesses under 500 contacts, Klaviyo's free tier eliminates upfront cost entirely.
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What are the biggest feature differences between Klaviyo and Constant Contact?
Klaviyo's profile-based architecture and real-time dynamic segmentation enable behavior-triggered automation across email, SMS, and push simultaneouslyΓÇöcritical for ecommerce. Constant Contact uses list-based segmentation with limited automation templates on lower tiers. Klaviyo includes native revenue attribution, predictive segmentation, and Flows AI for faster workflow setup. Constant Contact's AI features (copy generation, subject lines) are solid but lack Klaviyo's per-subscriber send-time optimization and multivariate testing. For SMS, Klaviyo includes credits on all paid plans; Constant Contact charges $10/month as an add-on. Constant Contact excels in simplicity and social posting, but Klaviyo's automation depth and ecommerce-specific tools (purchase triggers, product recommendations, LTV dashboards) make it substantially more powerful for revenue-focused teams.
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How difficult is it to migrate from Constant Contact to Klaviyo?
Migration from Constant Contact to Klaviyo is straightforward for most small businesses. Both platforms accept CSV contact imports, and Klaviyo's 350+ integrations mean your existing tools (Shopify, WooCommerce, Zapier) will reconnect without manual setup. The main effort involves rebuilding automation workflowsΓÇöConstant Contact's template-based automations don't transfer directly to Klaviyo's visual Flows builder, but Klaviyo's Flows AI can accelerate this process. Plan 1ΓÇô2 weeks for a complete transition if you have complex workflows; simpler setups take 2ΓÇô3 days. Your contact data moves cleanly; your email templates require manual recreation in Klaviyo's editor, though the drag-and-drop interface makes this fast.
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Which tool has better integrations and customer support?
Klaviyo offers 350+ integrations compared to Constant Contact's 300+, but the difference is negligible. The real gap is customer support. Klaviyo provides standard support on paid plans with documented response times, while Constant Contact is praised by users for responsive, helpful support. However, Klaviyo users report slow responses and limited availability, making Constant Contact the stronger choice if support responsiveness is critical to your operations. For integrations alone, both platforms cover major ecommerce and CRM tools adequately.