Kit vs Mails.ai
Both sit in email marketing. Here is how they differ on the things you can actually check.
On price: Mails.ai starts $13 a month cheaper than Kit ($20 against $33, 39% less) on its Pro tier. Both figures were read from the vendors' own pricing pages on the dates shown below.
Kit
kit.com
Formerly ConvertKit. Tag-based subscriber model, visual automations, paid newsletter support and a creator recommendation network. Strong fit for writers and course sellers.
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.
| Kit | Mails.ai | |
|---|---|---|
| Entry price | $33/mo | $20/mo |
| Entry plan | Creator | Pro |
| Paid annually | $33/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 | 2013 | 2025 |
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.
Kit vs Mails.ai, answered
- Is Kit cheaper than Mails.ai?
- No — Mails.ai is the cheaper entry point, at $20 a month against Kit's $33, 39% less. Kit's figure is its annual rate — the vendor publishes no month-to-month price we could read.
- Do Kit or Mails.ai have a free plan?
- Both do. Kit and Mails.ai each publish an ongoing free tier rather than a time-limited trial.
- What is the difference between Kit and Mails.ai?
- Kit: Formerly ConvertKit. Tag-based subscriber model, visual automations, paid newsletter support and a creator recommendation network. Strong fit for writers and course sellers. 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.
