Maildoso vs Inframail: pricing, features, and verdict for 2026

Maildoso vs Inframail: Side-by-Side Comparison

For teams running 33 or more inboxes, Inframail's flat $99/month rate is simply cheaper than Maildoso's per-inbox model. Below that threshold, Maildoso wins on deliverability because Google Workspace infrastructure performs better in Gmail-heavy B2B audiences than Microsoft-hosted alternatives, per deliverability benchmarks from Mailreach's 2025 data.

Deliverability: Google vs Microsoft Infrastructure

Maildoso's Google Workspace inboxes land in primary tabs more often than Microsoft-hosted alternatives when your prospects use Gmail, which still covers the majority of SaaS and tech buyers. Inframail's Microsoft infrastructure performs competitively in finance, manufacturing, and healthcare where Outlook dominates, per Mailreach's 2025 inbox placement benchmarks.

This isn't a minor distinction. If 70% of your prospect list is on Google Workspace, sending from a Google inbox gives you a natural alignment that Microsoft-based sending can't replicate. The inverse holds for Outlook-heavy industries.

Maildoso bundles warm-up in its managed service. You don't need a separate tool like Warmbox or Mailwarm, which typically run $29-49/month. Inframail doesn't include warm-up by default, so you'll need your sending platform's built-in warm-up or a standalone service on top.

Pricing: Where Each Tool Wins

Inframail is cheaper once you cross 33 active inboxes. At exactly 33 inboxes on Maildoso's ~$3/inbox rate, you hit $99/month and match Inframail's flat price. Above that, every inbox on Maildoso costs you money Inframail already covers. At 60 inboxes, you're paying roughly $180/month on Maildoso versus $99 on Inframail, per each platform's pricing page.

Maildoso's per-inbox model has one real advantage for agencies: you can track what each client's infrastructure costs and bill accordingly. Inframail's flat rate is harder to allocate across clients without restructuring your own billing model.

Domain costs are a separate variable. Maildoso handles domain provisioning but charges extra depending on the plan. With Inframail, you bring your own domains. At $10-15/year per domain through Namecheap or Cloudflare, it's manageable for small setups.

Setup and Day-to-Day Management

Maildoso handles DNS configuration, SPF, DKIM, and DMARC records for every inbox it provisions. If you don't have a technical ops person on staff, that's genuinely worth paying for. Misconfigured DNS records are the most common reason cold email lands in spam folders, and most founders and SDRs can't reliably audit them without help.

Inframail is also managed, but the unlimited inbox model means bulk provisioning at scale. Setting up 50 inboxes at once requires a clear naming system and tracking spreadsheet before you start. It's not complicated, but it's not as hands-off as Maildoso's structured per-inbox workflow.

Both platforms integrate with Smartlead, Instantly, and most major sending tools. Neither requires custom API work for standard use cases.

Who Should Use Maildoso vs Inframail?

Maildoso fits agencies and consulting teams that manage cold email across multiple clients, want Google-based deliverability, and need per-inbox billing for clean cost attribution. Inframail fits in-house teams and solo operators who need 30+ inboxes and want one flat monthly number instead of per-seat calculations.

Choose Maildoso if:

• You're managing cold email for multiple clients and need per-inbox cost tracking
• Your prospects are primarily on Google Workspace or Gmail
• You want built-in warm-up without adding another tool to your stack
• You're running under 30 active inboxes total

Choose Inframail if:

• You need 30+ inboxes and want a flat monthly rate
• Your prospects are in Outlook-heavy verticals like finance or manufacturing
• You already handle warm-up through your sending platform
• You want to stop calculating per-inbox costs every month

If you'd rather not think about infrastructure at all, Modern Inbound's cold email service handles inboxes, domains, copy, and replies together.

Scale Outreach Without Hiring SDRs

Most B2B teams underestimate the work before sending: buyer-language research, list logic, DNS, warm-up, deliverability, copy testing, and reply handling. Modern Inbound runs the operating layer so founders can stay focused on sales calls.

Frequently Asked Questions

Is Maildoso or Inframail better for cold email?

Maildoso is better for agencies prioritizing Google Workspace deliverability and per-inbox billing. Inframail is better for high-volume senders who need 30+ inboxes and want a flat $99/month rate. For teams under 30 inboxes, Maildoso wins on deliverability. Above 30, Inframail wins on cost.

How much does Inframail cost?

Inframail charges $99/month for unlimited Microsoft-hosted inboxes, per their pricing page. There's no per-inbox fee, making it cost-effective for teams scaling beyond 30 active senders.

Does Maildoso include email warm-up?

Yes. Maildoso includes inbox warm-up as part of its managed service. You don't need a separate warm-up tool, saving $29-49/month compared to standalone services, per Maildoso's feature page.

What's the main difference between Maildoso and Inframail?

Maildoso uses Google Workspace infrastructure at roughly $3/inbox/month. Inframail uses Microsoft infrastructure at $99/month for unlimited inboxes. Google-based inboxes perform better for Gmail-heavy B2B audiences. Microsoft-based inboxes perform better in Outlook-heavy verticals like finance and manufacturing.

Which is better for a cold email agency?

Maildoso is the stronger agency choice. Per-inbox billing makes cost tracking by client straightforward, and Google Workspace infrastructure delivers better inbox placement for most B2B audiences. Inframail's flat-rate model is harder to allocate across client accounts without restructuring your billing.