Constant Contact vs Klaviyo

Constant Contact and Klaviyo are both marketing options. Constant Contact lists 6 features across 3 platforms; Klaviyo lists 6 features across 1 platform — see the full breakdown below, sourced from each vendor's own site rather than ratings or reviews.

Side-by-side summary

ComparingConstant ContactKlaviyo

CategoryMarketingMarketing

Alternatives tracked42

PlatformsWeb, iOS, AndroidWeb

Pricing modelPaid plansNot yet documented

Best for Constant Contact

Positioned for small businesses, nonprofits, and local service providers that want an easy-to-use platform for email and SMS marketing, event promotion, and sign-up forms with accessible phone support.

Best for Klaviyo

Positioned for consumer/B2C brands, especially e-commerce retailers, plus enterprise brands, restaurants, and wellness companies wanting to consolidate a fragmented marketing tech stack.

Feature comparison

Every feature listed here comes directly from each vendor's own official site.

Constant Contact

Automated email sends for events like welcomes, birthdays, and re-sends to non-openers
SMS marketing with automated VIP alerts, abandoned-cart reminders, and event updates
Custom automation paths with branching and triggered actions
Website sign-up forms, pop-ups, and lead-generation landing pages
Event registration management, ticketing, and invitation tracking
Integrations with popular CRMs and e-commerce platforms to sync contacts and orders

Klaviyo

Composer: AI agent that audits and generates on-brand campaigns/flows from prompts
Customer Agent: AI customer service that autonomously resolves a majority of inquiries
Omnichannel marketing (email, SMS, RCS, WhatsApp, mobile push, social)
Klaviyo Data Platform for unified customer profiles/events
Real-time marketing analytics and omnichannel attribution
Customer Hub & Helpdesk for self-service support

Pros and cons

Constant Contact

Pros

Automated email sends for events like welcomes, birthdays, and re-sends to non-openers
SMS marketing with automated VIP alerts, abandoned-cart reminders, and event updates
Custom automation paths with branching and triggered actions
Website sign-up forms, pop-ups, and lead-generation landing pages
Event registration management, ticketing, and invitation tracking
Integrations with popular CRMs and e-commerce platforms to sync contacts and orders

Cons

We don't infer weaknesses from missing or differently worded vendor marketing copy. Use documented plan limits, migration requirements, and other sourced constraints as decision inputs; anything not supported by a source remains unverified.

Klaviyo

Pros

Composer: AI agent that audits and generates on-brand campaigns/flows from prompts
Customer Agent: AI customer service that autonomously resolves a majority of inquiries
Omnichannel marketing (email, SMS, RCS, WhatsApp, mobile push, social)
Klaviyo Data Platform for unified customer profiles/events
Real-time marketing analytics and omnichannel attribution
Customer Hub & Helpdesk for self-service support

Cons

Key differences

Constant Contact lists Automated email sends for events like welcomes, birthdays, and re-sends to non-openers, SMS marketing with automated VIP alerts, abandoned-cart reminders, and event updates, Custom automation paths with branching and triggered actions, Website sign-up forms, pop-ups, and lead-generation landing pages, Event registration management, ticketing, and invitation tracking, Integrations with popular CRMs and e-commerce platforms to sync contacts and orders that Klaviyo doesn't list.
Klaviyo lists Composer: AI agent that audits and generates on-brand campaigns/flows from prompts, Customer Agent: AI customer service that autonomously resolves a majority of inquiries, Omnichannel marketing (email, SMS, RCS, WhatsApp, mobile push, social), Klaviyo Data Platform for unified customer profiles/events, Real-time marketing analytics and omnichannel attribution, Customer Hub & Helpdesk for self-service support that Constant Contact doesn't list.
Constant Contact supports iOS, Android, which Klaviyo doesn't list.

Choose Constant Contact if…

Choose Constant Contact if this fits: Positioned for small businesses, nonprofits, and local service providers that want an easy-to-use platform for email and SMS marketing, event promotion, and sign-up forms with accessible phone support.

Visit Constant Contact

This is an affiliate link. See our Affiliate Disclosure.

Choose Klaviyo if…

Choose Klaviyo if this fits: Positioned for consumer/B2C brands, especially e-commerce retailers, plus enterprise brands, restaurants, and wellness companies wanting to consolidate a fragmented marketing tech stack.

Visit Klaviyo

Facts on this page are sourced from each vendor's official site (linked below), not from ratings or reviews. Products change — verify anything that matters to your decision directly on the vendor's own site before switching. See our Disclaimer and Sources Policy.