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
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
- 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
- No permanent free plan; free trial is time-limited
- Contact-tiered pricing scales up quickly as subscriber lists grow
- Advanced workflow automation is restricted to higher tiers
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
- The Free plan is capped at 250 active profiles and 500 email sends per month; exceeding those limits can pause sending until the account upgrades or the billing cycle resets.
- Free-plan email support is available only for the first 60 days; after that, support is primarily self-service through Klaviyo's Help Center, Academy, and Community.
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. Compared with Klaviyo specifically, Constant Contact also offers 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, and 3 more features that Klaviyo doesn't list, plus iOS, Android support that Klaviyo doesn't list.
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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. Compared with Constant Contact specifically, Klaviyo also offers 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), and 3 more features that Constant Contact doesn't list.
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.
Constant Contact sources
Last verified August 19, 2026
- https://www.constantcontact.com/features/view-all-features
- https://www.constantcontact.com/features/sms
- https://www.constantcontact.com/features/email-marketing-automation
- https://www.constantcontact.com/pricing
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