| What it does | Email warmup and cold outreach software that warms Gmail and Outlook mailboxes before sending campaigns
| Email marketing for developers. Paste a form, no backend, write in Markdown, run from your coding agent.
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| Stage | Startup
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| Founded | 2026
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| Based in | Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Free: $0/month for 1 mailbox with capped campaign sends. Starter: $19/month for 5 mailboxes with unmetered sending and 7-day trial. Growth: $49/month for 25 mailboxes. Agency: $179/month for 100 mailboxes. OneMail hosted mailboxes: $0.99–$2.99/month per mailbox depending on plan. Annual billing is t
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| Key features | - Daily DNS checks for SPF, DKIM, DMARC and blocklists
- Unified inbox for all replies from all mailboxes sorted by intent
- AI-powered first line opener using prospect's website data
- OneMail hosted mailboxes with pre-configured DNS
- LinkedIn integration for warmup and outreach in same sequence
- Lead database with email finder and verification before sending
| - Write campaigns in Markdown files
- Run broadcasts from coding agent over MCP
- Double opt-in on by default
- Automatic domain authentication with DNS setup
- Export subscriber data to CSV or JSON
- Lists and campaigns stored as repository files
- 30-day money-back guarantee on paid plans
- SPF, DKIM, DMARC authentication
- One-click unsubscribe and bounce suppression
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| What makes it different | - Flat-rate pricing by mailbox count with no per-email fees, even on paid plans
- Threaded warmup emails that mimic real email conversations instead of ping-pong
- Unified inbox collects all replies from every mailbox in one queue
- Automatic spam rescue moves warmup messages out of junk automatically
- LinkedIn and email outreach in one platform without separate tools
| - Developer-first workflow with no dashboard required—set up forms, manage lists, and send campaigns entirely from your coding agent and repository
- More subscribers at lower entry price than competitors: 3,000 subscribers at $9/mo vs Mailchimp ~$13 for 500 or Kit ~$25 for 1,000
- Completely free tier with 100 subscribers and no credit card or trial clock
- Version-controlled campaigns as Markdown files reviewed in pull requests
- Open source platform with no backend infrastructure to maintain
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 24 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 27 | 0 |
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| Referring domains (Majestic) | 31 | 0 |
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Warmerly
CodeOutbox