HotHawk vs Warmup Inbox
Warmup Inbox is the cheapest place to warm one or two mailboxes, billed per inbox. HotHawk bakes warmup into the platform that sends, on a larger Google and Microsoft pool, at a flat price that holds as you scale.
Choose HotHawk if
You are warming more than a couple of mailboxes and want warmup free inside the tool that sends, on a larger Google and Microsoft pool with quarantine and instant suspension, with the Master Inbox and ClientBox in the same login.
Choose Warmup Inbox if
You only need to warm one or two inboxes and want the cheapest standalone warmer there is, with warmup in several languages and a 7-day trial, laid over a sender you already use.
Last updated June 2026
HotHawk is cold email software for serious outbound teams.
Special offer
Get 50% more sending, FREE.
50% extra sending on any plan, every month for as long as you're with us.
Side by side
HotHawk vs Warmup Inbox at a glance.
Both warm real Google and Microsoft inboxes, so that is even. The difference is the model and the maths: we bundle warmup into a full sender at a flat price, Warmup Inbox is the cheaper per-inbox warmer on one or two mailboxes.
| Feature | HotHawk | Warmup Inbox |
|---|---|---|
| Warmup | ||
| Warms real Google and Microsoft inboxes | ||
| Disclosed warmup pool size | 50,000+ | 15,000+ |
| Google and Microsoft inboxes only | Mixed providers | |
| Quarantine and instant suspension of bouncing mailboxes | Reputation-drop alerts | |
| Topic and multi-language warmup | Topic, business-relevant | Topic + 12 languages + ESP |
| The model | ||
| Sends your campaigns | ||
| Warmup bundled in, no separate bill | Per-inbox add-on | |
| Pricing unit | $97/mo flat, all-in | From ~$15 per inbox/mo |
| Free trial | 7 days, no card | 7 days, no card |
| Beyond warmup | ||
| Master Inbox for replies and team routing | ||
| White-label client portal | ClientBox | |
Comparison based on publicly available information from warmupinbox.com and hothawk.ai, accurate as of June 2026. Warmup Inbox is billed per inbox, from about $15 a mailbox a month on annual billing on the Basic plan; its Pro and Max prices vary across sources (roughly $49 and $79), so check the live page. Pool sizes are each vendor’s own disclosed figure (third parties cite a larger number for Warmup Inbox), not an audited count. Warmup Inbox is a trademark of its respective owner; HotHawk is not affiliated with or endorsed by Warmup Inbox.
Where HotHawk wins
Warmup built into the sender, not bolted on.
Warmup Inbox warms a mailbox, then hands it back for you to send from somewhere else, and bills you per inbox to do it. HotHawk warms the inboxes it already sends from, on every plan, and the price does not move as you add more.
It comes with the sender
Warmup is on every HotHawk plan from $97 a month, with unlimited mailboxes warmed. Warmup Inbox charges per inbox, so warming ten mailboxes is ten line items; ours is one price however many you connect.
A bigger, tighter pool
We warm on 50,000+ disclosed inboxes restricted to Google and Microsoft. Warmup Inbox discloses 15,000+ across a mix of providers, so even where the headline numbers are close, the make-up of the pool is not the same.
Bad mailboxes get pulled
A mailbox that starts bouncing is suspended on the spot, and risky ones are quarantined before they spread. Warmup Inbox sends you a reputation-drop alert; we act at the mailbox level rather than leaving it to you to react.
Real conversations, hidden from you
The AI holds genuine business-relevant threads and keeps the warmup mail out of your inbox. Both tools warm real Google and Microsoft accounts, so that part is parity, and we are not going to dress it up as a win.
Where HotHawk wins
The best Master Inbox in cold email.
Warming a mailbox is only the start. The moment a prospect replies, a standalone warmer is done, and Warmup Inbox has no inbox at all. HotHawk catches every reply and routes it to the right rep, which is the half of cold email a warmer alone never reaches.
It catches every reply
The Master Inbox connects to your real mailboxes and pulls in forwarded replies, CC’d colleagues, out-of-office notes and people who reply from an address you never emailed. Warmup Inbox warms the mailbox and stops there, so the reply goes wherever your sender puts it.
Every reply gets an owner
Round robin shares new replies evenly across the team, and mailbox groups route them by the inbox they came in on, so nothing waits around unassigned.
Each rep gets their own view
Give every rep a My Inbox of only their replies, or run one shared team inbox, and managers keep the full picture either way.
The warm ones surface first
Replies sort into positive, negative and out of office, so the team works the people who want to talk before chasing anyone else.
Where Warmup Inbox wins
It is the cheapest way to warm one inbox.
If you only have a mailbox or two to warm, Warmup Inbox is hard to beat on price. Basic starts around $15 an inbox a month on annual billing, with a 7-day trial and no card, so you can test it before you pay anything. It warms across real Google and Microsoft accounts, and on its higher tiers it adds warmup in 12 languages and ESP-specific warmup, which is genuinely useful if you send in more than one language. For warming a single important inbox cheaply, it does the job well, and we are not going to pretend a $97 platform is the right call for that.
We are built for the other end of that. Once you are warming a fleet and you want the warmup, the sending and the replies in one place at a flat price, that is where HotHawk pulls ahead.
The verdict
Which tool should you pick?
Pick HotHawk
When you are warming more than a couple of mailboxes and want warmup free inside the platform that sends, on a larger Google and Microsoft pool with quarantine and instant suspension, plus the Master Inbox and ClientBox, at one flat $97 a month.
Pick Warmup Inbox
When you only need to warm one or two inboxes and want the cheapest standalone warmer going, with multi-language warmup and a no-card trial, laid over a sender you already have.
FAQ
HotHawk vs Warmup Inbox questions.
What is the difference between HotHawk and Warmup Inbox?
Warmup Inbox is a dedicated, low-cost warmer that you point at mailboxes you send from somewhere else, billed per inbox. HotHawk is the platform that sends, with warmup built into every plan, plus the Master Inbox for replies and ClientBox for agencies. Warmup Inbox does one thing cheaply; HotHawk does the whole job in one place.
How much does Warmup Inbox cost?
Warmup Inbox is priced per inbox. The Basic plan is around $15 a mailbox a month on annual billing, or $19 monthly, with the Pro and Max tiers higher (roughly $49 and $79, though the figures vary by source). There is a 7-day trial with no card. HotHawk is $97 a month all-in, with unlimited mailboxes warmed, which works out cheaper the moment you are warming more than a handful of inboxes.
Does HotHawk warm real inboxes like Warmup Inbox?
Yes, and that part is genuine parity. Both warm against real Google and Microsoft accounts and keep the warmup mail out of your inbox. The honest differences are the pool and the model: ours is 50,000+ disclosed inboxes restricted to Google and Microsoft, bundled into the sender, with quarantine and instant suspension of bouncing mailboxes, where Warmup Inbox discloses a smaller, mixed-provider pool and bills per inbox.
Is Warmup Inbox cheaper than HotHawk?
On one or two mailboxes, yes. At $15 an inbox a month it is the cheapest way to warm a single inbox, and that is a real edge. But because it charges per inbox, the cost climbs in a straight line, so on a fleet of mailboxes a flat $97 plan overtakes it quickly. The honest split is cheapest-for-one versus flat-for-many.
Does Warmup Inbox do anything HotHawk does not?
Yes, two things worth naming. It offers warmup in 12 languages and ESP-specific warmup on its higher tiers, which is useful if you send in several languages, and it is the cheapest entry point anywhere for warming a single inbox. HotHawk keeps warmup focused on business-relevant English threads inside the sending platform rather than offering those niche warmup modes.
Can I switch from Warmup Inbox to HotHawk?
Yes. You connect your own mailboxes over OAuth or SMTP and warmup starts automatically, with no separate tool to manage. The first thing you notice is that the per-inbox warmup bill goes away, and your sending and replies now live in the same place as the warmup.
Send cold emails that get delivered.Never miss a positive reply.
Serious deliverability paired with the best reply management in the market.
No credit card required.