6 Aerosend Alternatives That Actually Handle Cold Email Infrastructure
G2 lists Mailchimp as an Aerosend alternative. Mailchimp - for cold email infrastructure. That tells you everything about how poorly this niche is covered.
Most teams evaluating Aerosend alternatives are sitting at 50-60% inbox placement without realizing bad data, not bad infrastructure, is the root cause. We've watched agencies cycle through three or four providers before someone finally checks their bounce rate and finds it north of 12%.
Aerosend does one thing well: cold email infrastructure - dedicated IPs, isolation per 10-domain batch, and burn alerts that warn you before deliverability craters. Starter pricing is $120/mo for 10 domains and 30 inboxes, which is solid. But if you need better bulk pricing, a different IP model, or your list quality is the actual problem, here are six alternatives worth evaluating.
Our Picks (TL;DR)
- Prospeo - If your bounce rate is above 4%, no infrastructure saves you. Fix the data first.
- Maildoso - Cheapest per-mailbox cost at scale. Budget warmup separately.
- Infraforge - Closest to Aerosend's dedicated-IP model, with better pricing at volume.
You're comparing cold email infrastructure - but Stack Optimize hit $1M ARR with zero domain flags because they fixed the data first. Prospeo's 5-step verification catches spam traps, honeypots, and catch-alls before they torch your domains. 98% email accuracy at ~$0.01/email.
Stop cycling through infrastructure providers. Fix your bounce rate.
Best Aerosend Alternatives in 2026
Prospeo
Infrastructure keeps you out of spam. Data keeps you from bouncing. These are two different problems, and most teams conflate them.
We've seen agencies burn through 50+ domains before realizing the data was the issue, not the infrastructure. If 10%+ of your list bounces, your sender reputation tanks regardless of whether you're on dedicated IPs, shared pools, or carrier pigeons. One of our customers, Stack Optimize, was dealing with exactly this - they built from $0 to $1M ARR after switching to verified data, maintaining 94%+ deliverability and bounce rates under 3% across every client campaign. Zero domain flags.
Prospeo's 5-step verification - spam traps, honeypots, and catch-alls removal, catch-all handling, honeypot filtering - catches bad addresses before they torch your domains. The numbers: 143M+ verified emails, 98% accuracy, roughly $0.01 per email verified. Data refreshes every 7 days, so contacts verified last month aren't stale by the time you send. There's a free tier at 75 emails/month if you want to test it, and native integrations with Smartlead, Instantly, and Lemlist pipe verified contacts straight into your sequencer without CSV gymnastics.
Use this if: your bounce rate is above 4% and you're blaming your infrastructure provider. Skip this if: you already verify before every send and your list is clean.
Maildoso
Maildoso is the volume play. At 32 mailboxes for $100/mo ($3.10/mailbox), it's already cheaper than Aerosend. Scale to 400 mailboxes and you're at ~$1.83/mailbox. One agency reported negotiating down to ~$1.40/mailbox at 500+ accounts.
The catch: warmup isn't included. Maildoso's AI warmup add-on runs $160/mo for 32 mailboxes up to $2,000/mo for 400. That changes the math significantly - what looks like the cheapest option can end up costing more than Aerosend once you factor in warmup, especially below 100 mailboxes where the add-on fee hits harder.
A user-reported benchmark on Reddit comparing 500 SMTP mailboxes against 500 Google Workspace mailboxes showed SMTP pulling a 2.3% reply rate vs 1.8% for Google Workspace - at roughly a third of the cost per reply ($0.10 vs $0.28). Worth knowing: Maildoso had a blacklisting situation that took mailboxes offline. The founder compensated users with free domains and inboxes, but cheap infrastructure carries concentration risk.
Use this if: you're running 100+ mailboxes and optimizing cost-per-reply. Skip this if: you want warmup bundled and don't want a separate add-on bill.
Infraforge
The closest direct swap for Aerosend. Infraforge runs dedicated IPs with multi-IP provisioning, free DNS setup, and a white-label reseller program for agencies. Pricing starts at $4/mailbox/month, dropping to ~$2.50 at bulk volume - undercutting Aerosend's effective per-mailbox cost once you're past ~50 mailboxes.
If you're happy with Aerosend's model but want better pricing at scale, this is the move. Below 30 mailboxes, the savings don't justify switching.
Mailforge
Mailforge runs a shared-IP pool model with slot-based billing at $3/mailbox/month on yearly plans. Minimum 10 slots. Domains run $14/year for .com. Setup is dead simple - automated SPF/DKIM/DMARC configuration, no DNS headaches.
Here's the thing: shared IPs get a bad reputation they don't fully deserve. Gmail and Outlook run shared pools. The question isn't "dedicated vs. shared" - it's whether the pool operator maintains reputation aggressively. Mailforge does. But you're betting on their discipline, not your own.
Use this if: you want the simplest setup at a predictable monthly cost.
Primeforge
Primeforge delivers done-for-you Google Workspace and Microsoft 365 mailboxes - real GW/M365 accounts with US-based IPs, ready to send in about 30 minutes. Pricing sits at $4.50/mailbox/month, dropping to ~$3.50 at volume. Domains are $14/year, minimum 10 slots.
In our experience, SMTP infrastructure is cheaper and often outperforms GW on reply rates, so Primeforge only makes sense if your sequencer or compliance setup specifically requires Google or Microsoft accounts. For everyone else, it's paying a premium for a brand name on the envelope.
Zapmail
Plans from $39/mo (10 mailboxes) to $299/mo (100 mailboxes), plus pre-warmed plans with 12 weeks of warmup history.
Look - a Reddit thread on r/coldemail alleges Zapmail uses India-based Google Workspace reseller accounts rather than the US-based IPs they advertise. We haven't independently confirmed this, but it's worth verifying your IP origin before committing. Ask support for a traceroute or check the headers on your first test send.
Pricing at a Glance
All costs normalized to ~30 mailboxes where possible.
| Provider | ~Cost (30 boxes) | Per Mailbox | IP Type | Warmup? |
|---|---|---|---|---|
| Aerosend | $120/mo | ~$4.00 | Dedicated | Included |
| Maildoso | ~$100/mo (32) | ~$3.10 | SMTP | Extra ($160/mo) |
| Infraforge | ~$120/mo | ~$4.00 | Dedicated | Not included |
| Mailforge | ~$90/mo (yearly) | ~$3.00 | Shared pool | Not included |
| Primeforge | ~$135/mo | ~$4.50 | GW/M365 | Not included |
| Zapmail | $99/mo (30) | ~$3.30 | GW (verify origin) | Pre-warmed plans available |
Dedicated IPs, shared pools, SMTP vs Google Workspace - none of it matters if 10%+ of your list bounces. Prospeo refreshes 143M+ verified emails every 7 days and pipes clean contacts directly into Smartlead, Instantly, and Lemlist. No CSV gymnastics.
Clean data in, clean sends out. Test it with 75 free verifications.
Is Aerosend worth it in 2026?
Yes, for teams needing dedicated IPs and burn alerts at moderate scale. The ~$4/mailbox cost is competitive with most alternatives. Main drawbacks: limited G2 reviews, no deliverability graphs, and no domain tagging for campaign organization.
What's the cheapest cold email infrastructure?
Maildoso at scale - down to ~$1.83/mailbox at 400 accounts. Mailforge runs $3/mailbox on yearly billing. Factor in warmup costs separately for both; Maildoso's add-on alone can run $160-$2,000/mo depending on volume.
Does email verification improve cold email deliverability?
If 10%+ of your list bounces, sender reputation tanks regardless of infrastructure. Verification catches invalid addresses before you send, keeping bounce rates under 4% - the threshold where most ESPs start throttling your domain.
How do I choose between dedicated and shared IPs?
Dedicated IPs (Aerosend, Infraforge) give you full control over sender reputation - ideal above 50 mailboxes. Shared pools (Mailforge) are simpler and cheaper but depend on the operator's hygiene. Below 30 mailboxes, shared pools are usually fine.