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Most warmup tools charge $29/mailbox/month. WarmInbox gives you 3 mailboxes on the Starter plan for the same price — and 10 on Pro for $79.
Connects via SMTP/IMAP, sends realistic human-like emails daily between a pool of real accounts, marks them as read, replies 40% of the time. Warmup score goes from 0 to 100 over 4 weeks. Works with Gmail, Outlook, and any custom domain.
Free plan available — 1 mailbox, no credit card required.
WarmInbox — Email WarmupEmail warmup: 3 mailboxes for what others charge for one
Alec Jonathanstarted a discussion
I got tired of paying $116/month just to warm up email inboxes.
So I built my own tool. For context: I was running cold email campaigns across 4 mailboxes. Every warmup service I tried charged $29/mailbox/month. That's $116/mo before sending a single email. So I spent 2 weeks building WarmInbox. It does the same thing the big tools do: → Connects to any mailbox via SMTP/IMAP → Sends realistic emails to a pool of real accounts daily → Opens them, replies 40%...
Alec Jonathanleft a comment
Happy to answer any questions about how it works under the hood. Built this after paying $116/mo across 4 mailboxes at Lemwarm. Took about 2 weeks to build. Stack is Node.js, PostgreSQL, React. AMA.
WarmInbox — Email WarmupEmail warmup: 3 mailboxes for what others charge for one