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Mailionaire vs InboxKit
InboxKit is a self-serve platform for Microsoft 365, Azure and Google mailboxes with a lot of built-in tooling.
| Mailionaire | InboxKit | |
|---|---|---|
| Email platform | Microsoft 365 | Microsoft 365 / Azure / Google |
| Who runs it | Done for you (managed) | Self-serve platform |
| Pricing model | Per active domain, flat — no per-mailbox metering | Per mailbox |
| EU / Swiss data residency | Optional EU/Swiss (EU/CH IPs, Microsoft EU Data Boundary) | US IP space |
InboxKit details are a snapshot from mid-2026; check their site for current details.
Choose InboxKit if…
- — You want a hands-on, self-serve platform with extensive tooling.
- — You want Microsoft, Azure and Google mailboxes in one place.
- — You prefer per-mailbox pricing and US infrastructure.
Choose Mailionaire if…
- You send to European recipients, or need mailbox data to sit in the EU/Switzerland (EU/CH IPs, Microsoft EU Data Boundary).
- You want one flat price per sending domain, with no per-mailbox metering and no year-two price jump.
- You want it fully managed — set up, monitored, and worn mailboxes and domains replaced for you.
Neither option makes cold email legal: consent and the recipient's local law are always the sender's responsibility, whichever provider you use. See is cold email legal? and what EU residency does and doesn't do.
Want the full picture? Compare all providers side by side, or see how Mailionaire works and what it costs.
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