WarmySender is a cold email platform that puts mailbox warmup, a B2B lead database, email verification, and multi-step sequences in one place. It connects Gmail, Outlook, and any SMTP/IMAP mailbox, and it is aimed at consultants, agencies, and sales teams who want to protect deliverability while they send.
Warmup runs automatically with gradual ramp-up and multi-turn conversations, and Bounce Shield verifies addresses before they enter a sequence. Campaigns are built in a visual sequence builder with conditional branching and A-Z testing of up to 26 variants, plus a pre-send spam score checker, mailbox rotation, custom tracking domains, and a unified inbox. You can pull prospects from the 200M-contact database, a CSV, or a Sales Navigator URL, and drive the whole tool from Claude or other AI agents through its MCP server or REST API. LinkedIn, Instagram, and WhatsApp outreach are separate monthly add-ons, not part of the lifetime deal.
The AppSumo deal is a one-time purchase with 6 tiers, all mapped to the Pro plan with the same features; higher tiers add volume. Tier 1 ($59) gives 10,000 emails, 1,000 leads, and 800 verifications per month, with 1 workspace, 1 member, 40 warmed mailboxes, and 40 cold mailboxes. Tier 4 ($399), the highlighted tier, gives 100,000 emails, 25,000 leads, 12,000 verifications, 5 members, 100 warmed mailboxes, and 500 cold mailboxes. Tiers 5 ($639) and 6 ($999) are for AppSumo Plus members only and go up to 400,000 emails and 200,000 leads per month.
