Mails.ai
8.5/10★ 3 (29)Email infrastructure for AI agents, with built-in prompt-injection scanning and sender reputation scoring.
Free plan⚠ Not publishedPolicy published
Email infrastructure for AI agents, with built-in prompt-injection scanning and sender reputation scoring.
Extracted from Mails.ai's own site and policies — “Not published” means we looked and it isn't there.
Free trial
Free plan
Starting price
$20/mo
Free $0/mo (3,000 events/mo, 1 agent); Pro $20/mo; Scale $99/mo; usage-based Metered pricing (coming soon) at $0.001/send, $0.002/inbound, +
Refund policy
⚠ Not published
Privacy & your data
Policy published
Collects account data, message data (headers, body, attachments metadata) and classifier output, stored per workspace and not shared with other custom
Support
Company
Not stated
Best for: developers building AI agents that need to send and receive email safely via API
Standout: structures every inbound email into a scored event with a six-category prompt-injection scanner and sender-reputation throttling enforced at the API
Top-scored alternatives in Email Infrastructure for AI Agents.
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|---|---|---|---|---|---|
| Free plan | $20/mo | ⚠ Not published | Policy published | Compare → | |
| ✓ Free trial | — | ✓ 30 days | Policy published | Compare → | |
| ✓ Free trial · 3 free renders | Free plan | ✓ Money-back guarantee | ⚠ Not published | Compare → | |
| ✓ Free trial · no card | $15/mo | ✓ 7 days | ⚠ Not published | Compare → | |
| ✓ Free trial | $44/mo | ✓ 14 days | Policy published | Compare → |
Our 5-point vetting, with evidence quotes from their own pages.
—Money-back guarantee verified
✓Free trial confirmed
✓Reachable human support
✓No fine-print return traps
✓No unrealistic marketing claims
Vetted 2026-07-21 · How we compare →
★ 3/5 from 29 reviews on Trustpilot — quoted verbatim, good or bad.