ActiveCampaign vs Mails.ai
Both sit in email marketing. Here is how they differ on the things you can actually check.
On price: ActiveCampaign starts $5 a month cheaper than Mails.ai ($15 against $20, 25% less). Where a price could not be read from the vendor's page it is marked indicative below.
ActiveCampaign
activecampaign.com
Best known for its visual automation builder — branching, conditional waits, lead scoring and CRM deals in the same product. Aimed at teams that outgrow simple broadcast tools.
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.
| ActiveCampaign | Mails.ai | |
|---|---|---|
| Entry price | $15/mo | $20/mo |
| Entry plan | — | Pro |
| Paid annually | — | — |
| Price checked | not verified | 21 Sept 2026 |
| Pricing model | Free trial | Free plan |
| Free plan | No | Yes |
| Category | Email Marketing | Email Marketing |
| Around since | 2003 | 2025 |
1 of these 2 prices were read from the vendor's own pricing page, most recently on 21 Sept 2026; the rest are indicative. Entry tier only — vendors change pricing without notice.
ActiveCampaign vs Mails.ai, answered
- Is ActiveCampaign cheaper than Mails.ai?
- Yes. ActiveCampaign starts at $15 a month against Mails.ai's $20, 25% less.
- Do ActiveCampaign or Mails.ai have a free plan?
- Mails.ai publishes an ongoing free plan; ActiveCampaign does not.
- What is the difference between ActiveCampaign and Mails.ai?
- ActiveCampaign: Best known for its visual automation builder — branching, conditional waits, lead scoring and CRM deals in the same product. Aimed at teams that outgrow simple broadcast tools. 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.
