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Ecommerce email marketing comparison: Klaviyo vs Constant Contact

As an ecommerce store owner, you want to drive as many sales as possible to grow your business and improve the experience you can offer to your customers. This can be done through a variety of means, including email marketing software.

Email marketing automation can be used to send targeted campaigns to customers based on their behaviour, driving sales and revenue. A sophisticated platform with a wide feature set can help you take your ecommerce store to the next level.

So, which software should you choose? In this article, we'll compare Klaviyo and Constant Contact to understand which of these services could be the best email marketing tool for your ecommerce business.

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Klaviyo vs Constant Contact: Overview


Constant Contact

Monthly price plans

  • Free plan: Up to 250 contacts and 500 email sends
  • $20: Up to 500 contacts and unlimited email sends
  • $30: Up to 1,000 contacts and unlimited email sends
  • $45: Up to 1500 contacts and unlimited email sends
  • $60: Up to 2500 contacts and unlimited email sends

Then plus $10 for every additional 500 contacts.

  • Core plan: From $9.99 for up to 500 contacts
  • Plus plan: From $45 for up to 500 contacts

Constant Contact uses a tiered pricing model, so on either plan, there is an additional premium for more than 500 contacts based on the size of your email list.

List sizes of more than 50,000 contacts are automatically upgraded from Core to Plus and the pricing is bespoke.

The packages have a monthly send limit of 24 times your total contacts.


Rapid integration with major ecommerce platforms, especially Shopify, as well as social media, reporting and analytics, sales generation and more essential ecommerce tools.

Variety of integrations, such as:

  • Eventbrite
  • Shopify
  • WordPress
  • Office 365
  • Salesforce
  • Quickbooks
  • BigCommerce
  • Vimeo

Analytics and reporting

Predictive analytics of customer metrics and attributes. Reports focused on revenue and ecommerce performance rather than email metrics.

Real-time reporting and sophisticated analytics.


Ecommerce-specific. Designed for online stores of all sizes.

Small businesses such as non-profits.

A/B testing

Sophisticated A/B testing beyond subject lines and content to optimise your campaigns.

Subject line A/B testing.

Customer support

Email support and live chat is available to paid subscribers. The Help Center is free to use for all subscribers.

Live chat, phone lines, community forum and knowledge base for all subscribers.

Email marketing features

Email templates

Klaviyo offers dozens of pre-built, themed templates that are optimised for UX and created with ecommerce priorities in mind. These templates are customisable and allow you to pull in and remove different design elements using the handy drag-and-drop editor that requires no coding. You can also create reusable content for different templates that is automatically updated whenever you use it so that your branding stays consistent.

Constant Contact also offers a variety of customisable email templates and a drag-and-drop editor. However, Constant Contact’s templates are less visually appealing and might be difficult to customise for someone unfamiliar with coding. Klaviyo templates, on the other hand, are intuitive and can be customised quite easily.

Automated workflows

Klaviyo makes it easy to automate your email campaigns so that you can focus on other aspects of your business. Flows are Klaviyo's way of sending automated emails to subscribers based on their shopping behaviours. You can set up a flow to trigger an email or series of emails based on a number of conditions that you define. For example, you can set up a flow to send a welcome email to new subscribers or a coupon code to customers who haven't shopped with your online store in a while.

With Klaviyo, you can create workflows for customer segmentation, abandoned cart emails and order follow-ups. You can also use Klaviyo's powerful automation features to send time-sensitive emails, such as birthday coupons or shipping notifications.

Constant Contact’s capabilities are relatively simple, and on the Core plan only allow you to send welcome emails to new contacts. On the Plus plan, you can also send birthday or anniversary emails, resend emails with a different subject line to subscribers who didn’t open your first message and use their list-building tools such as Facebook and Instagram Ads to find and acquire new contacts.


Email segmentation divides your email list into smaller groups based on commonalities like demographics, interests and shopping behaviour. This allows you to send more targeted emails that are more likely to be engaging to each subscriber. Segmentation helps improve open and click-through rates, boosting ROI.

Klaviyo's segments are super-specific and based on customer data collected from your ecommerce store and socials. The segments automatically update as your customers interact with your website and marketing communications.

Constant Contact lets you segment your contact list based on factors like engagement level, purchase history and signup date.


Ecommerce platforms

Klaviyo offers integrations with a number of major ecommerce platforms, including Shopify and Shopify Plus, WooCommerce, Magento and Salesforce Commerce Cloud.

Constant Contact also connects with Shopify, as well as other ecommerce platforms such as BigCommerce. In addition, Constant Contact offers a Zapier integration that allows you to connect with over 700 different applications.

Social media

Klaviyo integrates with all the major social media services, including Facebook, Twitter and Instagram. You can also tap into user-generated content and influencer marketing using tools such as LoudCrowd and Foursixty.

Constant Contact integrates with all the major social networks as well but also connects with additional platforms such as LinkedIn and Pinterest.


Both Klaviyo and Constant Contact can integrate with a variety of analytics tools that can help you better understand your customers and optimize your campaigns. Klaviyo offers integrations with Polar Analytics, Sweet and Databox, among others. Constant Contact offers integrations with Zoho CRM Analytics, Glances and ClicData.

Sales/lead generation

Both platforms offer a number of sales and lead generation integrations that can help businesses boost their marketing efforts. Klaviyo's integrations include Poptin, LeadsTunnel and Convert pro, and they also offer an API that you can use to create custom integrations.

Constant Contact's contact growth and lead generation integrations include Salesforce CRM, Typeform, Automate.io and Gatsby.

Ecommerce viability

Both Klaviyo and Constant Contact provide features that allow store owners to create and send automated email campaigns, track customer engagement and segment customers into different lists.

Klaviyo is a powerful email marketing service, tailoring everything from its extensive feature set and targeted emails to reporting and campaign analytics specifically for ecommerce businesses of any size. Because it also integrates with a large number of ecommerce platforms and social media, Klaviyo is ideal for an online store wanting to grow without compromising on customer experience.

Constant Contact offers a wide range of templates and design options, but is less ecommerce-specific than Klaviyo. This means it is more suited to general email marketing purposes. In terms of support for growth and marketing, Klaviyo and Constant Contact both offer great features and resources that can help ecommerce stores to succeed.

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