Compare
Mailionaire vs other providers.
A plain, side-by-side look at how Mailionaire compares to other Microsoft 365 cold email infrastructure providers. We compare on four things that actually differ between them — and skip the rest.
| Provider | Email platform | Who runs it | Pricing model | EU / Swiss residency |
|---|---|---|---|---|
| Mailionaire | Microsoft 365 | Done for you (managed) | Per active domain, flat — no per-mailbox metering | Optional EU/Swiss |
| OutEngine | Microsoft 365 | Done for you (white-label) | Per batch of inboxes (bring-your-own-tenant option) | US IP space |
| InboxKit | Microsoft 365 / Azure / Google | Self-serve platform | Per mailbox | US IP space |
| ScaledMail | Microsoft 365 / Google / SMTP | Done for you (white-glove) | Per domain (Microsoft) or per mailbox (Google) | US IP space |
| Inboxing | Microsoft 365 | Self-serve | Per domain (high inbox density) | US IP space |
| Hypertide | Microsoft 365 / Azure / Google | Done for you | Per order (batch of inboxes) | US IP space |
| Mailrun | Microsoft Azure | Done for you (automated) | Flat monthly tiers (by inbox bundle) | US IP space |
| Inframail | Microsoft 365 / Azure | Done for you | Flat volume tiers (unlimited inboxes) | US IP space |
| ScaleSends | Microsoft 365 | You build it (DIY tool) | Per tenant (you manage them) | US or European accounts |
Competitor details are a snapshot from mid-2026. Providers change their offering and pricing — check each provider's own site for current details. We compare pricing as a model rather than a number for the same reason.
The one difference that really narrows the field
Most Microsoft 365 cold email providers run on US IP space. The clearest dividing line is EU/Swiss data residency: Mailionaire is built and run in Switzerland and can place your mailbox content at rest in the EU/Switzerland on EU/CH IPs, under the Microsoft EU Data Boundary. For US recipients, US IPs are usually the better choice — so residency is an option, not the default.
Beyond that, the differences come down to the billing model (we charge a flat price per active domain, not per mailbox) and how much work stays on your plate (we run it for you and replace worn mailboxes and domains as they wear out). None of this makes one provider universally "best" — pick the one whose trade-offs match your priorities.
One line that applies to every provider here: infrastructure does not make cold email legal. Consent and the recipient's local law are always the sender's responsibility. See is cold email legal?