Product
The software, and the sending behind it.
Furnace is a cold email platform. You run the campaigns, replies, and metrics. We find your leads and set up, warm, watch, and replace the domains and mailboxes behind them, from $289 a month.
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In the app
What you work with.
Campaign flows
Build a sequence as a flow of emails, waits, and a categorizer that branches on how someone replies. Test subject lines and copy with A/B variants on any email.
Master Inbox
Every reply from every mailbox lands in one inbox. AI sorts each one as Interested, Neutral, Not Interested, or Auto Reply, and you can change the label any time.
Metrics
See leads reached, emails sent, replies, and interested replies by campaign, by variant, and over time.
Leads
Work from the lead list we build for you, or import your own.
Our side
What we take off your plate.
You pay for a monthly sending volume. Keeping that volume healthy is on us.
Lead lists
We source people who match your audience from whichever data providers cover them, each with a verified email. Included on every plan.
Domains and mailboxes
Every plan comes with sending domains, mailboxes, and backups. We buy them, set them up, and keep them warm. You start on pre-warmed mailboxes, so there's no warm-up wait.
Monitoring
We compare every sending domain against its siblings each week. Any mailbox that burns out is replaced at no extra cost.
Careful sending
Plain-text emails, no open or click tracking, and limits on every mailbox keep your sending looking like a person's.
Connect it
Use it from the tools you already use.
Included on every plan.
- Connector for Claude, ChatGPT, and other AI tools
- API for anything you want to build
- Webhooks for replies and campaign events
- CRM sync to HubSpot, Salesforce, and others through OutboundSync
Ready to stop managing mailboxes?
Tell us who you want to reach. We'll set up the sending and show you around.
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