InboxKit pricing

InboxKit charges one flat rate per mailbox with no plans and no included slots: $3.00/mailbox/month on monthly billing and $2.50 on annual. Ten mailboxes cost ten times the rate; there is no base fee to clear first. Google Workspace and Microsoft 365 are the same price — there is no Microsoft premium. Azure is billed at $30 per tenant per month, and each tenant holds up to 100 mailboxes. Every mailbox includes automated DNS setup, official admin panel access with 2FA, app passwords, and 24+ sequencer integrations.

The rate is the same at every volume — one mailbox and five hundred mailboxes are both $3.00/month, so there is no tier to climb. The discount comes from the billing cycle instead: $2.50 on annual, which is 17% off. For very large deployments, contact our team for custom pricing with dedicated support and SLA guarantees.

Creating an InboxKit account is free and does not ask for a card — you pay only for the mailboxes you add. There is no traditional free trial on top of that, and no minimum or plan to commit to, so you can start with a single mailbox for $3.00/month and scale from there. The first month of InfraGuard monitoring is free, which is enough to evaluate deliverability, DNS automation, and integrations before you add volume.

There is no promo code today. The discount is built into the billing cycle rather than hidden behind a code: $2.50/mailbox/month on annual saves 17% against monthly. Creating an account is free, so you can see the exact total for your mailbox count before you pay anything.

InboxKit accepts all major credit cards (Visa, Mastercard, American Express). You top up a wallet and each mailbox is charged from it on its own renewal date. For agencies and enterprises managing large mailbox volumes, we also offer volume invoicing with NET-30 terms. Contact our sales team for custom billing arrangements.

Yes. You can switch your billing period at any time. Moving from monthly to annual takes the rate from $3.00 to $2.50, 17% off. Changes take effect at the start of your next billing cycle, and any credit from your current period is applied automatically.

Every mailbox includes automated DNS configuration (SPF, DKIM, DMARC), an official admin panel with 2FA for each domain, app password generation, full REST API access with webhooks, unlimited team members and workspaces, real-time monitoring and alerts, and integration with 24+ sequencers including Instantly, SmartLead, Apollo, and more.

InboxKit is one flat rate per mailbox — $2.50/mailbox/mo on annual billing — for official Google Workspace and Microsoft 365 accounts with full admin control, US-IP addresses and 90%+ inbox placement. Most providers in this category price per mailbox too, but differ on whether you get real admin access, whether the IPs are shared, and whether DNS and warmup are included or extra. Our side-by-side comparisons cover each provider in detail.