HotHawk vs MailToaster
MailToaster is the standalone warmup engine behind Reply.io’s native warm-up, a flat price per inbox on a mixed pool it does not size. HotHawk warms only real Google and Microsoft inboxes, built into the sender.
Choose HotHawk if
You sell to people on Google and Microsoft, and you want a disclosed warmup pool, sending and reply management in one platform rather than a warmup engine sitting under a separate sender.
Choose MailToaster if
You already run Reply.io, where MailToaster comes free with your email seats, or you just want simple, flat per-inbox warmup bolted onto the sender you have.
Last updated June 2026
HotHawk is cold email software for serious outbound teams.
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Side by side
HotHawk and MailToaster, line by line.
We win on a disclosed Google and Microsoft pool, newer warmup content and everything around it: the sender and the reply inbox. MailToaster’s edge is being free inside Reply.io. The detail is underneath.
| Feature | HotHawk | MailToaster |
|---|---|---|
| Warmup pool | ||
| Real-inbox warmup network | ||
| Restricted to Google and Microsoft | No, mixed providers | |
| Pool size disclosed | 50,000+, disclosed | Not disclosed anywhere |
| Warmup content model | Modern AI conversations | GPT-3 |
| Per-mailbox daily limits | Per-mailbox profiles | |
| Reputation protection | ||
| Spam rescue | ||
| SPF / DKIM / DMARC health checks | ||
| Mailbox quarantine + instant bounce suspension | Not documented | |
| Platform | ||
| Warmup inside a full sender | No, standalone (Reply.io’s warm-up runs on it) | |
| Master Inbox for replies + team routing | ||
| White-label client portal | ClientBox, included on Scale | |
| Pricing | ||
| Pricing model | Flat, metered on send volume | Flat $29 per inbox/mo |
| Free with Reply.io seats | Yes, one seat per Reply email seat | |
| Starting price | $97/mo all-in | $29/inbox/mo ($26 annual) |
Comparison based on publicly available information from mailtoaster.ai, reply.io and hothawk.ai, accurate as of June 2026. MailToaster is the warmup engine behind Reply.io’s native warm-up, and Reply.io grants a free MailToaster seat per Reply email seat; their public material describes a partnership and integration, and common ownership is inferred but not confirmed. MailToaster does not disclose its pool size. "Not documented" means a feature is not confirmed in MailToaster’s public material. MailToaster and Reply.io are trademarks of their respective owners; HotHawk is not affiliated with or endorsed by either.
Where HotHawk wins
Warmup built into the sender.
MailToaster is the warmup engine a sender like Reply.io runs on. HotHawk is the sender, and the warmup is held to a tighter spec because it lives inside the tool that does the sending.
A number you can see
HotHawk warms against a pool of more than 50,000 real Google and Microsoft inboxes, and we say so plainly. MailToaster discloses no pool size anywhere on its site, only a qualitative "large network of real accounts", and that network is mixed providers, not Google and Microsoft only. When you are weighing up warmup, a disclosed pool you can check beats a number nobody will quote.
Newer conversations than GPT-3
MailToaster generates its warmup content with GPT-3. HotHawk runs business-relevant warmup conversations on current AI models, which read more like real correspondence between two people who actually do business. Both are real inboxes replying to each other; the difference is how convincing the threads are.
Bad mailboxes pulled out fast
A risky inbox is quarantined and lifted out of the pool, and any mailbox that starts bouncing is suspended straight away, so one bad account does not pull the rest of your sending down. MailToaster runs spam rescue and a reputation-protect profile, but it does not document quarantine of bouncing mailboxes.
One platform, one bill
Warmup, the sender, the Master Inbox, the API and the MCP server are all in at $97 a month. MailToaster is a warmup engine on its own, the same one Reply.io’s warm-up runs on, so you still need a separate sender around it.
Where HotHawk wins
The best Master Inbox in cold email.
Warmup gets your mailboxes ready to send. It does nothing with the replies that come back. That is the part HotHawk is built around, and a standalone engine like MailToaster never touches it.
Every reply gets caught
It connects to your real mailboxes and pulls in the forwarded replies, the CC’d colleagues, the out-of-office notices and the people who answer from an address you never wrote to. A warmup engine has no reply inbox, so none of this exists in MailToaster.
Each one gets an owner
Round robin shares new replies evenly across the team, and mailbox groups route them by the inbox they came in on, the moment they land, so nothing sits unassigned while a warm lead goes quiet.
A My Inbox per rep
Every rep can see just their own replies, or you run one shared team inbox. You decide the visibility, and managers keep the full picture regardless.
The warm ones surface first
Replies are sorted into positive, negative and out of office automatically, so your team works the people who want to talk before they touch anything else.
Where MailToaster wins
Free if you already run Reply.io.
Two honest points in MailToaster’s favour. First, if you are a Reply.io customer it comes free, a seat for every Reply email seat you pay for, so the warmup is effectively part of a bill you are already paying. Second, the model is dead simple: a flat $29 an inbox, no volume maths, no tiers to read. If you want plain per-inbox warmup and you have a sender already, that simplicity is a fair reason to pick it.
HotHawk earns its keep elsewhere. It is the sender, the Master Inbox and ClientBox as well as the warmup, on a disclosed Google and Microsoft pool. If all of that lives in separate tools today, the all-in $97 a month tends to come out ahead. If you are already happy inside Reply.io, MailToaster being free with it is hard to argue with, and we would not try.
The verdict
Which one fits you?
Pick HotHawk
For warmup on a disclosed pool of real Google and Microsoft inboxes, native to a sender with the Master Inbox and ClientBox, when you want the whole workflow in one platform.
Pick MailToaster
If you already run Reply.io and get it free with your seats, or you want simple flat per-inbox warmup attached to a sender you already have.
FAQ
HotHawk vs MailToaster questions.
Is MailToaster the same as Reply.io’s warmup?
It is the engine behind it. Reply.io’s native warm-up runs on MailToaster, and Reply.io gives subscribers a free MailToaster seat for each Reply email seat. Their public material describes a partnership and integration, and the naming and bundled seats imply common ownership, though that is inferred rather than confirmed. Either way, comparing HotHawk to Reply.io’s warmup is largely comparing it to MailToaster, which is what this page does.
How does MailToaster pricing work?
MailToaster is a flat $29 per email account per month, or about $26 an account on annual billing. The build, maintain and repair options are warmup profiles within that one plan, not separate price tiers. If you are a Reply.io subscriber you get a MailToaster seat free for each Reply email seat, so for Reply users the warmup is effectively included. HotHawk is $97 a month all-in, with warmup on every plan and no per-inbox charge.
How big is the MailToaster warmup pool?
MailToaster does not say. Its site describes a "large network of real accounts" but discloses no size at all, and the network is mixed providers rather than Google and Microsoft only. HotHawk discloses a pool of more than 50,000 real Google and Microsoft inboxes, so you know what you are warming against and that it matches the providers your prospects sit on.
Is MailToaster’s GPT-3 content a problem?
It is dated rather than broken. MailToaster generates warmup messages with GPT-3, an older model, while HotHawk runs business-relevant warmup conversations on current AI. Both are real inboxes exchanging real threads, so the network does the heavy lifting either way; newer models simply make the conversations read more naturally.
What does HotHawk do that MailToaster does not?
The big one is everything around the warmup. MailToaster warms mailboxes and stops there. HotHawk is the sender too, with the Master Inbox catching and routing every reply across your team, ClientBox white-labelling it for agencies, per-mailbox daily limits, and quarantine plus instant suspension of bouncing inboxes. Where the two overlap, real-inbox warmup, spam rescue and SPF, DKIM and DMARC health checks, they are roughly level.
Can I switch from MailToaster or Reply.io to HotHawk?
Yes. You connect your own mailboxes over OAuth or SMTP, then import your leads and campaigns, so there is nothing to migrate at the infrastructure level. The bigger decision is that the whole sending workflow moves into HotHawk, where today you are only swapping the warmup engine sitting under your current sender.
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