Best AI Email Marketing Tools in 2026: Mailchimp vs ConvertKit vs Beehiiv
Email marketing is still the most reliable owned channel for bloggers and small businesses. Social reach is algorithmic. Email lands directly in someone's inbox. The tools have gotten better and the AI features have gotten genuinely useful. Here's how the main options compare.
Mailchimp The Default That's Lost Its Edge
Mailchimp was the standard for years because it had the best free tier and the most integrations. That's less true now. The free plan dropped from 2,000 subscribers to 500, which makes it less useful for new creators. The AI features (content optimizer, subject line suggestions) are available but require a paid plan to use properly.
Mailchimp still makes sense if you're e-commerce and already using Shopify the integration is solid and the audience segmentation works well for product-based businesses. For a content creator or blogger, there are better options at the same price point.
ConvertKit (now Kit) Built for Creators
ConvertKit is designed for bloggers, YouTubers, and online educators. The free plan allows up to 10,000 subscribers with unlimited emails, which is genuinely competitive. The visual automation builder is more intuitive than Mailchimp's for content-focused sequences.
The AI features in ConvertKit are modest compared to competitors mostly subject line suggestions and basic content optimization. But the core product is solid, and for a blogger who wants to build an email list without complex technical setup, it's the easiest starting point.
Beehiiv The New Favorite for Newsletter Creators
Beehiiv launched in 2021 and has grown fast by being specifically good at newsletters. The editor is clean, the analytics are more detailed than Mailchimp or ConvertKit (open rates, click rates, subscriber growth, revenue per subscriber), and the monetization features are built-in: paid subscriptions, ad network access, and referral programs.
The AI writing assistant in Beehiiv is the most newsletter-specific of the three it helps with subject lines, content ideas, and formatting suggestions within the editor. Free plan supports up to 2,500 subscribers. Paid starts at $49/month.
If you're serious about building a newsletter as a standalone product (rather than just an email list to support a blog), Beehiiv is where the serious newsletter operators are moving.
Which to Use
- Just starting out, building a blog list: ConvertKit free
- E-commerce or product business: Mailchimp
- Building a newsletter as a product: Beehiiv