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If you’re looking for the best AI tools for email marketing, the short answer is this: Mailchimp for most small businesses, Klaviyo for online stores, Brevo for tight budgets and large lists, ActiveCampaign for advanced automation, and Kit for creators and newsletter writers. They all send email. They differ in what the AI actually does, which plan you need before you get it, and how the price changes as your list grows. This guide compares all five using published pricing and feature details, so you can pick one without signing up for every free trial.

Email is one part of a bigger marketing stack. If you’re still choosing tools for social, content, and ads, start with our overview of the best AI tools for marketing in 2026, then come back here for the email-specific details.

What “AI” Actually Means in Email Marketing Tools

“AI” in an email platform’s marketing usually covers a handful of concrete features. Knowing which ones matter to you makes comparing tools much easier:

• Content generation: drafting subject lines, preview text, and body copy inside the email editor.
• Send-time optimization: looking at when each subscriber tends to open and scheduling delivery around that.
• Predictive segmentation: grouping contacts by predicted behavior, such as likelihood to buy or churn, instead of only by tags you set manually.
• Automation building: generating welcome series, abandoned-cart flows, or re-engagement sequences from a prompt or template.
• Analytics explanations: summarizing campaign results in plain language so you don’t have to build dashboards yourself.

Industry roundups tend to split the market into platforms that add AI to a full email service, and specialist tools that do one job well, like cold-outreach infrastructure or email coaching for sales reps. Simular’s hands-on review uses roughly that split. This guide covers the first group, the all-in-one platforms, because that’s where most freelancers, creators, and small businesses send newsletters and automated emails.

Quick Comparison: Best AI Tools for Email Marketing

Tool	Best for	Free plan	Paid starting price	Where the AI lives
Mailchimp	General small business	250 contacts, 500 sends/month	Standard from $20/month (500 contacts)	Standard plan and up
Klaviyo	Ecommerce stores	250 active profiles, 500 emails/month	Email from $20/month (251–500 profiles)	Included on all plans
Brevo	Budget senders, large lists	300 emails/day	Starter from $9/month (5,000 emails)	Aura included across plans
ActiveCampaign	Advanced automation	No (14-day trial)	Starter $19/month at 1,000 contacts	Plus plan and up
Kit	Creators and newsletters	Up to 10,000 subscribers	Creator $39/month at 1,000 subscribers	Subject line generator

Prices change often and depend on list size and billing cycle. Check each vendor’s pricing page before you commit. The figures above come from the sources linked in each section below.

1. Mailchimp: Best All-Around Pick for Small Businesses

Mailchimp’s AI features are branded under Intuit. According to Mailchimp’s AI tools page, they include “Write with AI” in the email editor, send-time and send-day optimization, predicted attributes for segmentation, pre-built marketing flows with AI-generated content, and Analytics AI, which explains campaign performance in plain language. Mailchimp also lists connectors for assistants like ChatGPT and Claude on Standard and Premium plans.

Pricing: Mailchimp cut its free plan to 250 contacts and 500 monthly sends in early 2026, according to Retainful’s pricing breakdown. The AI features require the Standard plan or higher. Standard starts at $20/month for 500 contacts and runs about $100/month at 5,000 contacts.

Pros:

• A broad AI feature set: writing help, send-time optimization, predictive segments, and analytics summaries in one place.
• A familiar interface with plenty of templates and integrations.
• Works with outside AI assistants if you already draft copy in ChatGPT or Claude.

Cons:

• AI isn’t available on the Free or Essentials plans.
• The free plan is now very small, so most businesses will have to pay.
• Costs rise quickly as your contact list grows.

Who it’s for: small businesses and professionals who want one well-known tool with AI help at every step, and who can budget for the Standard plan.

2. Klaviyo: Best for Ecommerce and Online Stores

Klaviyo was built around store data. Its AI works from purchase history, browsing behavior, and customer profiles. EmailToolTester’s Klaviyo pricing review notes that AI tools, including product recommendations and automated segmentation, come with every plan. Other roundups also mention predictive analytics, AI-generated segments and content, and a Marketing Agent that helps build campaigns and flows (Omnisend’s Klaviyo pricing guide covers this).

Pricing: The free plan covers up to 250 active profiles, 500 emails a month, and 150 SMS credits. The Email plan starts at $20/month for 251–500 active profiles, rises to about $30/month at 1,000 profiles, and reaches $150/month at 10,000. Since 2025, Klaviyo bills on active profiles in your account, so inactive subscribers you keep around still count toward your tier.

Pros:

• AI features aren’t locked behind a higher tier.
• Strong ecommerce data: predictive analytics and product recommendations work well for stores.
• Email and SMS in one platform.

Cons:

• Prices climb steeply once you pass about 10,000 profiles.
• The free plan has no A/B testing, adds Klaviyo branding, and only includes email support for the first 60 days.
• Probably more than you need if you don’t sell products online.

Who it’s for: Shopify-style online stores and DTC brands that want abandoned-cart flows, product recommendations, and purchase-based segments.

If you run a store and want to compare Klaviyo with other ecommerce tools, see our guide to the best AI tools for ecommerce.

3. Brevo: Best Budget Option for Large Lists

Brevo (formerly Sendinblue) charges by emails sent, not by contacts stored. That changes the math if you have a big list you email only occasionally. Its AI assistant, Aura, generates subject lines and email copy, adjusts tone, and translates campaigns. EmailToolTester reports that Aura is included across plan levels instead of being sold as a separate add-on.

Pricing: The free plan lets you send 300 emails a day. Starter begins at $9/month for 5,000 emails, and Standard starts at $18/month with landing pages, A/B testing, and advanced reporting. Removing Brevo’s logo from emails costs an extra $10/month on Starter, and automations on the Free and Starter plans are limited to 2,000 contacts. Brevo’s help center has the official plan details.

Pros:

• A low starting price, with AI writing help included.
• Send-based pricing suits large lists that you email infrequently.
• The free plan includes basic automation and CRM features.

Cons:

• Branding removal and some features cost extra.
• If you send often, list-based competitors can end up cheaper.
• A/B testing and landing pages start at Standard, not Starter.

Who it’s for: freelancers, local businesses, and nonprofits with larger contact lists who send a monthly or occasional newsletter and want to keep costs predictable.

4. ActiveCampaign: Best for Advanced Automation

ActiveCampaign is known for detailed, branching automations that combine email with CRM data. The catch is that its AI features sit above the entry plan. EmailToolTester’s ActiveCampaign pricing review notes that the Starter plan lacks AI tools, predictive sending, and landing pages, and caps workflows at five actions with no branching. Generative AI and advanced automation triggers begin on the Plus plan.

Pricing: At 1,000 contacts on monthly billing, Starter costs about $19/month and Plus about $59/month. Pro and Enterprise cost more and add features like predictive content and conversion attribution. There’s no permanent free plan, only a 14-day trial capped at 100 emails. Annual billing lowers the Starter price to around $15/month, according to EngageBay’s pricing guide.

Pros:

• One of the most flexible automation builders in this group.
• Built-in CRM features, useful for service businesses and B2B.
• Predictive features on higher tiers.

Cons:

• No AI on the Starter plan, so real AI use starts at Plus.
• No free plan.
• More of a learning curve than Mailchimp or Kit.

Who it’s for: consultants, agencies, coaches, and B2B service businesses that need lead nurturing and conditional follow-ups tied to a sales pipeline.

5. Kit: Best for Creators and Newsletter Writers

Kit (formerly ConvertKit) is aimed at creators who write newsletters and sell digital products. Its built-in AI is lighter than the others: EmailToolTester describes an AI-powered subject line generator but no broader AI suite, and TechRadar’s Kit review is another hands-on look at the platform. If you already write with ChatGPT or Claude, that gap matters less, because the main thing Kit gives you is a clean place to send what you write.

Pricing: Kit’s free Newsletter plan covers up to 10,000 subscribers with unlimited broadcasts, forms, and landing pages, but automations (including welcome sequences) have been removed from it. At 1,000 subscribers, Creator costs $39/month and Creator Pro costs $79/month. EmailVendorSelection’s Kit pricing guide covers how prices scale at larger list sizes.

Pros:

• A very generous free plan for growing a newsletter audience.
• Built for creators, with digital product sales and tagging.
• A simple editor that suits a writing-first workflow.

Cons:

• Limited built-in AI compared with Mailchimp or Klaviyo.
• Automated sequences require a paid plan.
• Paid plans cost more than Brevo at similar list sizes.

Who it’s for: writers, YouTubers, podcasters, and course creators who care more about growing and monetizing an audience than about predictive analytics.

How to Choose: Real-World Scenarios

Features on a pricing page only matter if they fit your situation. Here’s how the choice usually plays out:

• A freelance designer sending a monthly portfolio update to 3,000 past clients: Brevo’s send-based pricing keeps costs low, and Aura can draft the copy. You don’t need predictive segments for one email a month.
• A small Shopify store with 1,000 customers: Klaviyo. Abandoned-cart flows, product recommendations, and purchase-based segments are what drive revenue here, and its AI is included from the free plan up.
• A local service business (dentist, gym, salon) that wants an easy all-in-one tool: Mailchimp Standard. Send-time optimization and pre-built flows cover the basics without much setup.
• A B2B consultant nurturing leads over several weeks: ActiveCampaign Plus. Branching automations and CRM data handle “if they clicked the pricing link, send X” logic.
• A creator starting a newsletter from zero: Kit’s free plan. Write with any AI assistant you like, grow to a few thousand subscribers, and upgrade when you need automations.

Across all of these, a few questions do most of the work:

• Which plan unlocks the AI? Mailchimp and ActiveCampaign keep AI off their cheapest paid tiers. Klaviyo and Brevo include it more broadly.
• How is the price calculated? Per contact (Mailchimp, Kit, ActiveCampaign), per active profile (Klaviyo), or per email sent (Brevo). Run your real list size and sending frequency through each model.
• Do you need automation on day one? If a welcome sequence matters, remember that Kit’s free plan no longer includes it and ActiveCampaign Starter is limited.
• Where does your traffic come from? Email works best when steady sign-ups keep coming in. If your list growth depends on blog traffic, our comparison of the best AI tools for SEO pairs well with any of these platforms.

Tips for Using AI in Email Marketing Without Hurting Results

AI can speed up email work, but it doesn’t replace judgment. A few habits help:

• Edit every AI draft. Generated copy tends to sound generic. Add specific details only you know, such as a client result, a product change, or a personal note.
• Test subject lines instead of trusting them. Use A/B testing where your plan includes it, and keep in mind that some free plans don’t.
• Give send-time optimization enough data. It depends on engagement history, so a brand-new list won’t see much benefit at first.
• Clean your list. On per-contact or per-profile pricing, inactive subscribers cost money and drag down engagement metrics.

Conclusion

There’s no single best AI tool for email marketing. There’s the one that fits how you sell and how often you send. Mailchimp is the safest all-around choice if you can pay for Standard. Klaviyo is the clear pick for ecommerce. Brevo gives budget-conscious senders AI writing help at a low entry price. ActiveCampaign suits automation-heavy B2B work. Kit gives creators the most room to grow for free. Start with the free plan or trial of the tool that matches your scenario, send a few real campaigns, and compare open rates and time saved before you commit to an annual plan.

Frequently Asked Questions

Which email marketing tool has AI on its free plan?

According to the sources above, Klaviyo includes its AI tools across all plans, including free, and Brevo includes its Aura assistant across plan levels. Mailchimp requires the Standard plan or higher for its AI features, and ActiveCampaign has no free plan.

Can I just use ChatGPT or Claude to write my marketing emails?

Yes. Many people draft in a general AI assistant and paste the result into their email platform. Mailchimp even lists connectors for ChatGPT and Claude on its Standard and Premium plans. What a general assistant can’t do alone is send-time optimization, list segmentation, or automated flows, so you still need an email platform.

What is the cheapest AI email marketing tool for a small business?

Among the tools here, Brevo has the lowest paid starting price at $9/month for 5,000 emails, and its AI assistant is included. If your list is under 10,000 and you mainly send newsletters, Kit’s free plan is also worth a look, though its built-in AI is limited to subject lines.

Is Klaviyo worth it if I don’t run an online store?

Usually not. Klaviyo’s strengths are purchase-based segmentation, product recommendations, and ecommerce flows. For service businesses or creators, Mailchimp, ActiveCampaign, or Kit usually match the need better for the money.