Established deliverability reputation vs. fastest setup and lowest cost per mailbox.
Cold email infrastructure is the unglamorous foundation of outbound — you need warmed mailboxes on clean domains to actually land in inboxes. Mailforge and Maildoso both solve this problem: set up sending domains, provision mailboxes, warm them, and start sending. Neither is a sequencer. They are the plumbing underneath your Instantly, Smartlead, or EmailBison campaigns. The question is cost, setup speed, and which provider you trust with your deliverability.
Pricing model
Mailforge charges roughly $3 per mailbox per month with domains included. Maildoso undercuts that at around $1.80 per mailbox with free domains included. On a 50-mailbox setup — common for teams doing real volume — that difference is $60 per month. Not life-changing, but Maildoso is meaningfully cheaper at scale.
Setup and onboarding
Maildoso's pitch is speed — mailboxes provisioned and DNS configured in under 15 minutes. Mailforge takes slightly longer but has more documentation and a larger user community sharing setup guides. If you have never set up cold email infrastructure before, Mailforge has more resources to learn from. If you want to be sending today, Maildoso is faster.
Track record
Mailforge has been around longer and has a larger user base. More teams have tested deliverability, shared results, and documented what works. Maildoso is newer — the product works well, but there is less public data on long-term deliverability outcomes. In cold email infrastructure, reputation and IP pool quality matter more than features.
| Mailforge | Maildoso | |
|---|---|---|
| Cost per mailbox | ~$3/mailbox/month | ~$1.80/mailbox/month |
| Free domains | Included | Included |
| Setup time | 30–60 minutes | Under 15 minutes |
| User base | Larger — more established | Smaller — newer entrant |
| Deliverability data | More public benchmarks available | Less public data — newer product |
| DNS configuration | Guided setup | Auto-configured |
| Sequencer integrations | Instantly, Smartlead, others | Instantly, Smartlead, others |
| Best for | Teams wanting proven deliverability from an established provider | Budget-conscious teams wanting lowest cost and fastest onboarding |
The verdict
Mailforge for teams that want the more established provider with more public deliverability data and a larger community. When your inbox placement rates determine whether campaigns work, track record matters. Maildoso for budget-conscious teams that want the lowest cost per mailbox and the fastest onboarding — especially teams scaling from 20 to 100+ mailboxes where the per-mailbox savings compound. Both work. Neither is dramatically better. If you are starting fresh and want to minimize friction, Maildoso gets you running fastest. If you want the safer bet with more community validation, Mailforge is the proven choice.
Do I need a separate sequencer with these tools?
Yes. Mailforge and Maildoso provision and warm mailboxes. They do not send campaign emails. You connect the mailboxes to a sequencer like Instantly, Smartlead, or EmailBison to actually run your campaigns.
How many mailboxes do I need?
Most teams running meaningful cold email volume use 3-5 mailboxes per domain and 5-15 domains. That gives you 15-75 mailboxes rotating sends to keep per-mailbox volume low enough to protect deliverability. Start with 10-20 mailboxes and scale based on results.
What about just using Google Workspace or Microsoft 365 directly?
You can, but managing DNS, warmup, and rotation across dozens of domains is manual work. Mailforge and Maildoso automate the parts that are tedious and error-prone. The cost is low enough that the time savings justify it for any team doing more than a handful of sends per day.
No pitch deck. No 45-minute demo. A conversation about where your pipeline is stuck.