Quick answer
Mailchimp - Mailchimp wins for most builders because its free plan is clearer, card-free, and has a straightforward upgrade path once you outgrow the cap, while Klaviyo is better if you need deeper B2C CRM and service workflows from the start.
How the free tiers compare
These free tiers solve related but different problems. Klaviyo is built around customer data, segmentation, revenue attribution, and support workflows for ecommerce and relationship-driven brands. Its free tier gives you some real operating surface area, but the limits are tight: 250 active profiles, 500 email sends, and 150 mobile message credits. Mailchimp is narrower on CRM depth but more approachable for a builder who wants to launch email marketing fast. The free plan includes campaigns, forms, landing pages, basic reports, and a website builder, and it is explicitly card-free. The tradeoff is that Mailchimp’s free tier is more about entry-level marketing than unified customer operations. If you are trying to validate a list, ship campaigns, and stay simple, Mailchimp is easier. If you need B2C lifecycle logic and service tooling, Klaviyo is the stronger fit.
Klaviyo vs Mailchimp free tier, side by side
| KlaviyoFTV 50 | MailchimpFTV 41 | |
|---|---|---|
| Contacts / active profilesThe products use different terms, but the free-tier cap is the same scale. | Up to 250 active profiles for marketing contacts | Limited to 250 contacts |
| Email sendsMailchimp adds a daily cap on top of the monthly limit. | 500 email sends per month | Max 500 emails per month or 250 per day |
| Mobile message creditsKlaviyo includes SMS-style credits in the free tier; Mailchimp free pricing here does not list a comparable quota. | 150 per month | Not listed |
| Audiences / listsMailchimp constrains how many audiences you can maintain on free. | Not listed | 1 audience |
| UsersMailchimp’s free plan is single-user. | Not listed | 1 user |
| Credit card requiredOnly state this for Mailchimp because the field is present. | Not stated | No credit card required |
After you outgrow the free tier
Klaviyo’s paid pricing is usage-based, with the first paid tier named Marketing Data + Analytics, but the input does not include dollar rates, so costs are contact sales / varies by usage. Mailchimp starts with flat monthly pricing at $17 for Essentials, then $25 for Standard, and $500 for Premium. That makes Mailchimp easier to forecast for small teams. The cost gap widens once you want higher contact limits, more users, and advanced segmentation. For Klaviyo, you can only say the bill scales with usage from the free caps, not how much without a rate card.
Cost at real usage
| Usage | Klaviyo | Mailchimp |
|---|---|---|
| At 250 contacts and 500 emails/moMailchimp free also allows only 250 emails/day. | Free (within tier) | Free (within tier) |
| At 1,000 contacts and 12,000 emails/moKlaviyo has no quoted paid rate in the input, so this is not a numeric estimate. | contact sales / varies by usage | $17/mo for Essentials |
| At 10,000 contacts and 150,000 emails/moMailchimp Essentials includes up to 50,000 contacts and 12x contacts in monthly sends. | contact sales / varies by usage | $17/mo for Essentials |
| At 80,000 contacts and advanced segmentationMailchimp Essentials tops out at 50,000 contacts, while Standard goes to 100,000. | contact sales / varies by usage | $25/mo for Standard |
Estimates, not quotes. Usage-based rates change - verify with the vendor's pricing page before committing.
When to pick each one
Pick Klaviyo when…
- You are running a small ecommerce brand and want segmentation, revenue attribution, and helpdesk features in one place.
- You expect to use mobile message credits early, not just email.
- You need customer hub and basic service workflows alongside marketing.
- You are okay with a tighter free cap in exchange for a platform built around customer data and activation.
Pick Mailchimp when…
- You want a free plan that is explicitly no-credit-card-required.
- You are mainly sending email campaigns, forms, and landing pages, not running a full CRM.
- You need a website builder, basic reports, and a simple audience setup on day one.
- You want a clear jump to a low-cost paid tier once you exceed the free cap.
Bottom line
For the most common builder use case, Mailchimp is the easier free-tier pick: it is card-free, has a simple cap, and upgrades into a low-priced flat plan. Klaviyo is the better choice if your real need is customer data unification, attribution, and service workflows for ecommerce or other relationship-driven businesses. In other words, choose Mailchimp for getting campaigns out quickly, and choose Klaviyo when marketing is part of a broader CRM and support system.
Read the full listings: Klaviyo and Mailchimp. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.