Alternatives

Best Mailforge alternatives for cold outbound teams in 2026

August 26, 2026 · 4 min read

Mailforge charges $2-3 per mailbox with a 10-mailbox minimum. Compare 4 Mailforge alternatives for 2026 cold email infrastructure, real pricing included.

How to pick a tool

Never trust a vendor's sample data. Run your own list through the trial and count what comes back valid.

Mailforge sells cold email mailboxes for $2 to $3 each per month, with a 10-mailbox minimum and $14 domains billed separately. Mailforge is domain and mailbox infrastructure for cold outbound, but shared IP pools, a hard mailbox-slot minimum, and ties to the Salesforge ecosystem push some teams elsewhere. The strongest Mailforge alternatives in 2026 are Infraforge for dedicated IPs, Zapmail for pre-warmed Google Workspace inboxes, and Maildoso for the cheapest per-mailbox rate at scale.

By Rishabh Ambasta, Founder, Modern Inbound.

At a glance

Zapmail wins if you can't wait out a warmup: its mailboxes ship pre-warmed.
Maildoso is the runner-up on cost, down to $0.49/mailbox past 1,000 inboxes.
Infraforge earns its premium only past 20+ mailboxes, where isolated reputation matters.
Honest reframe: none of these fix a bad list. They just remove infrastructure as the bottleneck.

How do Mailforge alternatives compare on price in 2026?

Mailforge starts at $2-3 per mailbox with a 10-mailbox floor and separate $14 domains. Zapmail and Infraforge sit close on price but add pre-warmed accounts or dedicated IPs. Maildoso undercuts everyone at volume, and Inframail swaps per-seat billing for one flat fee.

Under 20 mailboxes: shared infrastructure from Mailforge or Zapmail is cheaper.
Past 40 mailboxes: Inframail's flat fee usually wins on total cost.

Tool	Starting Price	Best For	Standout Feature
Mailforge	$2-3/mailbox/mo	Teams on the Forge Stack	10-mailbox minimum, $14 domains billed separately
Infraforge	$3-4/mailbox/mo	Isolated sender reputation	Dedicated IP per mailbox, $99/mo add-on
Zapmail	$39/mo for 10 mailboxes	Skipping the warmup cycle	Real, pre-warmed Google Workspace accounts
Maildoso	$0.49-2.50/mailbox/mo	300+ mailbox senders	1,000 mailboxes for $499/mo, self-healing
Inframail	$99/mo flat, unlimited	Agencies past 40 inboxes	Unlimited Microsoft 365 inboxes, one flat fee

1. Infraforge

From $17/mo for 10 slots (about $4/mailbox) - Best for agencies protecting sender reputation - Dedicated IP on every mailbox

Verdict Infraforge is the right call when one reckless sender on shared infrastructure could tank a domain you didn't touch. You're paying for isolation, not cheap volume.

Slot-based billing means you pay for reserved capacity, not usage, and a dedicated IP add-on runs $99/month, per Infraforge's pricing page. Domains run about $13/year, in line with the category.

Where it falls short: under 20 mailboxes, the dedicated-IP premium rarely pays for itself.

2. Zapmail

From $39/mo for 10 mailboxes ($3.90 each) - Best for teams that can't absorb a 3-week warmup - Pre-warmed Google Workspace accounts

Verdict Zapmail is the one alternative that skips the waiting period entirely. If a campaign has to launch this week, that's worth the premium over Mailforge.

Plans scale from $39/month for 10 mailboxes to $299/month for 100, dropping to roughly $2/mailbox on annual billing, per Zapmail's pricing page. Mailboxes export straight into Instantly, Smartlead, and ReachInbox.

Where it falls short: mailboxes are provisioned through India-based Workspace resellers, which some US buyers flag during due diligence.

3. Maildoso

From $75/mo for 30 mailboxes ($2.50 each) - Best for agencies running 300+ inboxes - $0.49/mailbox at 1,000-mailbox scale

Verdict Maildoso is the cheapest per-seat option in this category by a wide margin once you're buying in bulk. Nobody else touches $0.49 a mailbox.

1,000 mailboxes run $499/month, well under what Mailforge or Infraforge charge at the same volume, per Maildoso's pricing page. Self-healing swaps and IP rotation are standard on every tier.

Where it falls short: every mailbox caps at 15 emails a day, so the price assumes tight volume discipline.

4. Inframail

From $99/mo flat - Best for agencies past 40 mailboxes tired of per-seat math - Unlimited Microsoft 365 inboxes for one fee

Verdict Inframail is the only tool here where scaling up doesn't scale your bill. Past 30-40 mailboxes it beats every per-seat competitor on this list.

The flat $99/month plan includes one dedicated US IP and 10 domains, per Inframail's pricing page. Add mailboxes without touching the invoice again.

Where it falls short: under 25 mailboxes, you're overpaying versus Mailforge or Maildoso's per-seat rates.

FAQ

Is Mailforge good for cold email infrastructure?

Yes, for teams already using Salesforge's tools and comfortable with a 10-mailbox minimum. It's priced at $2-3 per mailbox but shares IP pools across customers, which some agencies avoid.

What is the cheapest Mailforge alternative in 2026?

Maildoso is cheapest at scale, dropping to $0.49 per mailbox at 1,000 inboxes, per Maildoso's pricing page. At low volume, Mailforge and Zapmail land closer together near $2.50-3.

Which cold email tool has pre-warmed inboxes?

Zapmail sells real Google Workspace mailboxes that arrive already warmed, so campaigns can launch without a multi-week ramp. Mailforge and most others still require a standard warmup cycle.

Do I need dedicated IPs for cold email?

Only past meaningful volume. Below 20 mailboxes, shared infrastructure from Mailforge or Zapmail works fine; above that, Infraforge's dedicated IPs isolate you from other customers' mistakes.

Picking infrastructure is maybe 20% of the outbound problem. If you'd rather hand off the list building, copy, and sending too, that's what Modern Inbound's setup layer does.

Let’s chat about your sales pipeline goals.

A flat tech fee, then pay per positive reply delivered. No long lock-ins.

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Rishabh AmbastaFounder, Modern Inbound

Runs a research-led cold email agency measured in delivered replies. Before that, outbound for SaaS teams from $1M to $50M ARR. LinkedIn

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