Mails.ai

Mails.ai is a web-based AI cold email platform for B2B teams that need to create, warm up, and send high-volume outreach campaigns across multiple inboxes.

Key capabilities include:

• AI email writer that generates cold email sequences from a few campaign details, including personalized copy and follow-ups
• Unlimited email accounts with inbox rotation (round-robin sending) across providers such as Google Workspace, Outlook, Zoho, and custom SMTP (including free Gmail)
• Email warmup plus sender reputation and deliverability optimization, including campaign warmup focused on content-based spam detection
• Email verification to reduce bounces, with workflows to upload, verify, and run automated sequences against large contact lists

Pricing: Freemium. Free plan ($0/mo) includes unlimited email accounts and warmup (restricted to Gmail and Google Workspace). Paid plans start at $24/mo (Startup), $49/mo (Growth), and $99/mo (Pro) with email verification, AI writer, and higher monthly active contact limits.

Notable for supporting unlimited inbox connections, unlimited emails, and automation features focused on deliverability at scale, making it a fit for teams running large outbound campaigns without per-inbox pricing.