One flat price. Nothing gated. Nothing hidden.
Competitors quote $2.50 and bill $6 once platform fees, warmup add-ons, and replacement charges stack up. CLAYINBOX has one number per mailbox type — and every feature ships on every account.
What you'd actually pay
Drag the slider. Pick a provider. See the math vs typical tiered competitors.
One price per mailbox type. Everything else is free.
On every account. Always.
- Automated SPF, DKIM & DMARC
- Isolated warmup
- Blacklist & DNS monitoring
- Unlimited inbox placement tests
- Free unlimited mailbox replacements
- Unified master inbox
- One-click sequencer exports
- AI domain finder & bulk identities
- Custom tracking domains
- Full API + MCP server
- Weekly health reports
- Live chat support
Why we killed the pricing tier
The tier model means you pay for mailboxes you don't use. Buy 35 on a tiered platform and you're forced into the 100-mailbox bracket — or you pay inflated per-extra rates that quietly out-price the 100-tier anyway. The pricing page advertises the floor; the invoice ships with the ceiling.
Add-on stacking compounds it. Warmup at $3/mo per mailbox. Monitoring as a $30/mo suite. Paid replacements when a mailbox burns. A typical 50-mailbox setup on tiered platforms lands near $300/mo once everything's tallied — versus $125 flat here, with the same features included.
Flat pricing aligns incentives. We only grow when your sending grows, so deliverability tooling, replacements, and monitoring all get included — not upsold. The day we make replacement a paid feature is the day we start profiting from your bans. Not interested.
Vs the category, in one row
| Provider | Per mailbox | Tier fee | Warmup add-on |
|---|---|---|---|
| CLAYINBOX | $2.50 flat | $0 | $0 |
| Zapmail | $3.00+ | $39–299 | Paid add-on |
| InboxKit | $2.50–3.50 | $39–299 | $3/mo |
| CheapInboxes | $2.80–3.50 | Tiered | Included |
| Instantly DFY | ~$10 | Bundled | Bundled |
You own every domain. Always.
Domains from $13/yr (.com), Cloudflare-managed DNS, or connect domains you already own — free. Unlike DFY infrastructure where the provider owns the domains and refuses to transfer them, every domain here is registered to you and yours to keep if you ever leave.