Kit (ConvertKit) vs Mailchimp: Which Fits Your Email Business?

How we compared: This is a research-based comparison of official pricing and product documentation checked on September 7, 2026. Recommendations are our editorial judgment. Examples below are hypothetical. This article contains no affiliate links.

01Match the platform to the way you earn

Kit is the current name for ConvertKit. If you search using either name, you are comparing the same product family. For this guide, imagine a solo illustrator building a newsletter and selling downloads, or a small service business maintaining an email relationship with customers.

A useful starting question is: what should happen after someone signs up? A weekly newsletter, a welcome series, a course launch and a store follow-up require different workflows. Write down the first subscription event, the next message and the event that should stop a sales sequence.

We recommend shortlisting Kit for a creator-led relationship and Mailchimp when your business depends on its particular store or campaign integrations. We do not infer better sales or deliverability from either brand’s positioning.

Before you buyKit Free vs Creator for a Solo NewsletterKit Free or Creator: when sequences and automations are worth paying for.See the plans →

02Free-plan capacity and the first paid upgrade

Kit’s pricing page lists a free allowance of up to 10,000 subscribers and unlimited broadcasts. Its Creator offer at 1,000 subscribers is US$390 billed yearly; the displayed monthly equivalent is rounded. Unlimited visual automations and sequences are listed on Creator. Kit pricing

Mailchimp’s official plan guide lists 250 contacts, 500 monthly sends and a 250-send daily limit on Free. Paid cost depends on the feature tier and contact allowance. Mailchimp plan guide

Illustration: four broadcasts to 200 recipients would total 800 sends before any welcome emails. That exceeds a 500-send monthly allowance even though the list itself fits under 250 contacts. Audience size alone is not enough to decide whether a free plan works.

For Kit, separate basic free automation from the multi-step sales system you want. Its Newsletter-plan documentation describes basic visual automations; do not assume every condition, event or sequence available in a paid trial will remain available after downgrading. Kit free-plan automation guidance

03Who counts toward your bill?

Kit bills on confirmed subscribers. “Active” in this billing sense does not mean someone recently opened an email: a cold but still confirmed subscriber can remain billable. Kit billing, Subscriber status explained

Mailchimp counts subscribed, unsubscribed and non-subscribed contacts toward relevant monthly contact limits; cleaned, archived and deleted contacts are excluded. We corrected the earlier claim that cleaned addresses are charged. Its additional-charge guidance also explains peak contact totals during the billing period. Mailchimp contact types, Additional charges

Before comparing quotes, write down your sendable audience and your billable population separately. A contact’s permission to receive marketing is a different issue from whether retaining that record incurs a charge. Do not re-subscribe people merely to simplify an import or rebuild a list.

04Build a welcome-to-purchase test

Use a test address you control. This is a proposed evaluation workflow, not a claim that we ran it in either account:

1. Subscribe through a test form and check the confirmation process.
2. Deliver the promised resource and one welcome message.
3. Add a relevant interest tag or segment based on a deliberate action.
4. Send a sample offer only to the intended audience.
5. Simulate the supported purchase event and check that the buyer stops receiving that offer.
6. Unsubscribe the test address and verify that future marketing stops.

The important part is the exit condition. A workflow that sends the welcome email correctly but keeps pitching a product after purchase has not passed the test. Check the exact plan and integration required for each step.

For a service business, replace the purchase with an inquiry or booking only when your connected system provides the appropriate event. A click on a booking link is not proof that someone booked.

05Keep segmentation useful and manageable

Start with three categories: the topic someone requested, the action they took and whether they bought. These answer practical questions about relevance without requiring a complicated scoring model.

For example, a hypothetical designer selling templates might distinguish “interested in invoicing,” “downloaded an invoice template” and “bought the paid bundle.” Write the rule for each category so you can explain why someone received an email. Avoid treating a single open as conclusive evidence of buying intent.

Keep messages understandable even when the automation is sophisticated. Use a recognizable sender, a clear reason for the email and one primary next step. Either platform can be configured badly; a default template does not determine whether your brand sounds personal.

06Migration and deliverability checks

Before moving, export the fields you need together with permission and suppression information. Rebuild and test the essential forms and automations, and follow the destination vendor’s current domain-authentication instructions. Preserve unsubscribes and other suppression states.

Use a controlled first send to opted-in recipients and inspect delivery reports, replies, bounces and unsubscribes before expanding. We do not promise that switching platforms improves inbox placement, and we do not prescribe a fixed warm-up timetable without knowing the list or sending history.

Keep the old system available until your replacement forms, purchase events and unsubscribe handling work. Avoid running two overlapping automations that contact the same person twice.

07Frequently asked questions

Is Kit always cheaper?

No. Compare the relevant subscriber tier, automation features, transaction services and billing term. A large free allowance can be useful without establishing the best paid option at every audience size.

Is Mailchimp only for ecommerce?

No. Our recommendation is about checking the integrations and campaign process that matter to your business, not excluding other uses. Test a representative campaign before subscribing.

What should I check before annual billing?

Price the current audience and your next realistic size, including expected sends. Check the renewal total, overage rules and what happens after a trial. Buy the smallest plan that passes the workflow, rather than upgrading for features you may never use.

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