Mails.ai vs Mailchimp
Both sit in email marketing. Here is how they differ on the things you can actually check.
On price: Mailchimp starts $7 a month cheaper than Mails.ai ($13 against $20, 35% less) on its Essentials tier. Both figures were read from the vendors' own pricing pages on the dates shown below.
Mails.ai
mails.ai
Gives an AI agent a real mailbox: inbound arrives as structured reply events carrying a prompt-injection score and sender reputation, with a six-category injection scanner on every message, dedicated IPs and an MCP server. Cold email is refused at the API rather than in the fine print.
Mailchimp
mailchimp.com
One of the longest-running email marketing platforms. Campaign builder, audience segmentation, landing pages, basic automation journeys and a large template library. Owned by Intuit.
| Mails.ai | Mailchimp | |
|---|---|---|
| Entry price | $20/mo | $13/mo |
| Entry plan | Pro | Essentials |
| Paid annually | — | $13/mo |
| Price checked | 21 Sept 2026 | 21 Sept 2026 |
| Pricing model | Free plan | Free plan |
| Free plan | Yes | Yes |
| Category | Email Marketing | Email Marketing |
| Around since | 2025 | 2001 |
Every price here was read from the vendor's own pricing page, most recently on 21 Sept 2026. Entry tier only — vendors change pricing without notice.
Mails.ai vs Mailchimp, answered
- Is Mails.ai cheaper than Mailchimp?
- No — Mailchimp is the cheaper entry point, at $13 a month against Mails.ai's $20, 35% less.
- Do Mails.ai or Mailchimp have a free plan?
- Both do. Mails.ai and Mailchimp each publish an ongoing free tier rather than a time-limited trial.
- What is the difference between Mails.ai and Mailchimp?
- Mails.ai: Gives an AI agent a real mailbox: inbound arrives as structured reply events carrying a prompt-injection score and sender reputation, with a six-category injection scanner on every message, dedicated IPs and an MCP server. Cold email is refused at the API rather than in the fine print. Mailchimp: One of the longest-running email marketing platforms. Campaign builder, audience segmentation, landing pages, basic automation journeys and a large template library. Owned by Intuit.
