Shopify App Comparison 2026

Klaviyo: Email Marketing & SMS

4.52,593 reviews
VS

SendWILL Popup Email Marketing

4.97,134 reviews

Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for Klaviyo: and SendWILL Popup Email Marketing to find the best fit for your store.

Power smarter digital relationships with email, SMS, and push marketing driven by real-time customer data.

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Key Features

  • Drag-and-drop email builder with 100+ customizable templates
  • Predictive analytics for customer lifetime value and churn risk
  • Advanced segmentation based on real-time Shopify browsing and purchase data
  • Pre-built automation flows for welcome series, abandoned cart, and post-purchase
  • Unified SMS and push notifications alongside email in a single platform

Verdict on Klaviyo:

Klaviyo is the gold standard for data-driven Shopify email marketing. Its deep Shopify integration, predictive analytics, and powerful automation flows make it ideal for growing and established stores that want to maximize revenue per subscriber. The learning curve is steeper than simpler tools, but the ROI potential is unmatched for serious ecommerce brands.

Grow your email list fast with beautiful popups, spin wheels, and smart email capture forms.

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Key Features

  • Spin-to-win gamified popups that boost email capture rates
  • Exit-intent and scroll-triggered popup display rules
  • Seamless integration with Klaviyo, Mailchimp, Omnisend, and other platforms
  • Mobile-responsive popup designs with drag-and-drop customization
  • Built-in email and SMS subscriber collection with discount code delivery

Verdict on SendWILL

SendWILL is the best free popup and list-building tool on Shopify, and its 4.9 rating across 7,000+ reviews speaks volumes. If your primary goal is growing your email list quickly, this app delivers with gamified popups, smart triggers, and zero cost. It pairs perfectly with a dedicated email platform like Klaviyo or Omnisend for a powerful marketing stack.

Frequently Asked Questions

Is Klaviyo free for small stores?

Yes, Klaviyo offers a free plan that supports up to 250 contacts and 500 email sends per month, which is enough for many new stores to get started without any cost.

How does Klaviyo compare to Mailchimp for Shopify?

Klaviyo offers deeper native Shopify integration with real-time data sync, predictive analytics, and ecommerce-specific automations. Mailchimp is more of a general-purpose tool, while Klaviyo is built specifically for ecommerce.

Can Klaviyo handle both email and SMS marketing?

Yes, Klaviyo unifies email, SMS, and push notifications in a single platform. You can create cross-channel automations that combine all three channels based on customer behavior.

Is SendWILL really free?

Yes, the free plan includes unlimited popups, impressions, spin-to-win wheels, and integrations with major email platforms. The Premium plan at $22/month adds branding removal and advanced targeting.

Does SendWILL send emails or just collect subscribers?

SendWILL focuses on collecting email and SMS subscribers through popups and forms. To send email campaigns, you need a separate platform like Klaviyo, Omnisend, or Mailchimp.

Can I connect SendWILL to Klaviyo?

Yes, SendWILL integrates directly with Klaviyo, Mailchimp, Omnisend, and many other email marketing platforms. Subscribers captured through popups sync automatically to your email lists.