Warming up
Less boo. More booked. Halloween offer: 30 days free on any paid plan. Claim 30 days free
Less boo. More booked. Halloween offer: 30 days free on any paid plan. Claim 30 days free
Comparison
Warmbox is a warmup-only tool with a private warming network and a focus on inbox placement visibility. It supports Gmail, Outlook, and SMTP, but sells plans sized by inbox count (1, 3 or 6 inboxes on its listed plans, custom beyond that), so the price steps up as you add mailboxes.
The cheaper alternative with published prices: warmup included on every mailbox, daily SPF, DKIM and DMARC checks, and campaigns from the same mailboxes.
Dedicated warmup with a private inbox network, sold as plans of 1, 3 or 6 inboxes.
| Warmerly | Warmbox | |
|---|---|---|
| Pricing model | Flat, mailboxes and warmup included | By plan: 1, 3 or 6 inboxes, custom beyond that |
| Starting price (per month) | $19 for 5 mailboxes | $19 for 1 inbox ($15 billed yearly) |
| 5 mailboxes monthly cost | $19 | $159 on Growth, which covers 6 inboxes ($139 billed yearly) |
| 10 mailboxes monthly cost | $49 | Above 6 inboxes the page offers a custom Team plan, no price listed |
| Spam-folder rescue | Every spam-placed warmup message, after a human-like delay | Auto-Remove from Spam listed on every plan; details not stated |
| Reply with quoted history | Yes | Auto-reply to emails listed; quoted history not stated |
| Inbox placement seeds | Placement test, limited accuracy (no dedicated Gmail/Outlook seed list yet) | Spam score monitoring listed; seed list not stated |
| Auth monitoring (SPF/DKIM/DMARC) | Daily, with remediation copy | Live email checker for DNS and blacklists, listed on every plan |
| Reputation drop alerts | Email + webhook + Slack | Not stated on the pricing page |
| SMTP mailbox support | Gmail, Microsoft 365, any IMAP/SMTP | Gmail, Outlook, Yahoo, iCloud, AOL, Zoho, Amazon SES and any SMTP inbox |
| API access | Agency plan | Check current docs |
| USD/GBP billing & EU data residency | Yes | Not stated; the page says it meets GDPR and CCPA requirements |
| Free plan / trial | Free plan (no card), or a 7-day trial | No free plan or trial listed on the pricing page |
| Try before you pay | Free plan (no card) + 7-day trial; no refunds after the first charge | Check their terms |
Warmbox is a capable warmup tool with solid fundamentals. Its pricing page lists a private inbox network and support for many inbox types. For Gmail and Outlook users managing more than 2 or 3 mailboxes, Warmerly's flat rate is much cheaper on the listed prices, and Warmerly adds daily SPF, DKIM and DMARC checks with remediation steps, which Warmbox's pricing page does not describe.
Yes. Both warm Gmail, Microsoft 365 and generic IMAP/SMTP mailboxes with active warmup sequences: peer replies, spam recovery, and positive engagement signals.
Warmerly is flat-rate ($19 for 5 mailboxes, $49 for 25) so the price per mailbox falls as you add them. Warmbox's plans are sized by inbox count (1, 3 or 6), so its bill steps up as you add inboxes, and beyond 6 it offers a custom plan. At 10 mailboxes, Warmerly's $49 Growth plan has a listed price; Warmbox's page does not. Always verify Warmbox's current pricing at warmbox.ai before comparing.
No. Mailbox reputation is held by Gmail and Microsoft, not by your warmup tool. Switching tools does not affect it. Warmerly will pick up where Warmbox left off. Connect your mailbox, choose a ramp schedule, and the warmup continues seamlessly.
About 2 minutes per mailbox. Disconnect from Warmbox, connect to Warmerly with the mailbox connect flow, select a ramp curve, and you are live. No DNS changes required.
Connect a mailbox to Warmerly in 60 seconds. Free plan, no card required. Paid plans start with a 7-day trial, first charge on day 8, cancel any time before then. We will warm right alongside whatever you use now, so you can A/B without commitment.
