Short answer: The two price differently. Inframail's flat plans suit teams that want unlimited inboxes, a dedicated IP and one bill at high volume. Frostmailer suits teams that want to start small and pay per tenant with the domain included, also need Google Workspace, or want copy and campaigns built for them.
Side by side
| Frostmailer | Inframail | |
|---|---|---|
| Microsoft / Azure | Yes. €30 per tenant: one .com domain plus 25, 50 or 100 inboxes | Flat plans on Microsoft-backed infrastructure: $147 a month (recommended up to 400 mailboxes, 1 dedicated US IP) or $387 (up to 1,000 mailboxes, 3 IPs). Unlimited inboxes |
| Google Workspace | Full admin, €3.00 / €2.80 / €2.50 per inbox by volume | Not offered on the site |
| Domain included | Yes, a .com with every Azure tenant and with pre-warmed Google. For standard Google Workspace you bring your own | Not in the plan price. Buy through Inframail or bring your own for $5 a domain, one time. 10 free .com with a signup code |
| Pre-warmed | Azure €50 per tenant, Google €8 per inbox, 4 weeks of warm-up done | Not offered on the site. Premium warm-up is included in the done-for-you plan |
| Done-for-you build | Yes. Build and Release from €1,000 a month: infrastructure, copy, campaign and first month of leads | $797 a month, 3-month minimum: 400 inboxes, 80 .com domains, setup, warm-up and 40,000 verified B2B contacts |
| API and MCP | REST API and MCP server on every account | API on both plans. No MCP server mentioned |
| Delivery | 10 to 24 hours | Advertised as 2 minutes |
| SMTP | No | Not offered on the site |
Inframail details checked on 10 October 2026 from their public pages (sources below). Prices change, so confirm on their site before you buy.
When Inframail is the better choice
- You want unlimited inboxes and a high monthly sending allowance on one flat price.
- You want a dedicated IP included.
- You want near-instant setup.
- You want a done-for-you plan that bundles verified B2B contacts.
When Frostmailer is the better choice
- You want to start small. One Frostmailer tenant is €30 a month for 25, 50 or 100 inboxes, with no flat plan to fill.
- You want the domain included in the price rather than bought separately.
- You also need Google Workspace, standard or pre-warmed.
- You want your copy written and your campaign loaded for you. Build and Release does that from €1,000 a month, with the first month of leads.
- You want to order through an MCP server from Claude Code or Cursor.
Questions
Are Inframail mailboxes SMTP or Microsoft?
Inframail describes its inboxes as running on dedicated, Microsoft-backed infrastructure built on Microsoft's cloud. Its site does not offer SMTP.
Which is better value?
It depends on how you send. Inframail's flat plan covers unlimited inboxes and a large monthly sending allowance for one price. Frostmailer charges per tenant, so smaller setups cost less and each tenant includes its domain.
What does each done-for-you option include?
Inframail's is $797 a month with a 3-month minimum and includes 400 inboxes, 80 .com domains, warm-up and 40,000 verified contacts. Frostmailer's Build and Release, from €1,000 a month, builds the infrastructure, writes your copy, loads the campaign and supplies the first month of leads.