Warmbox
Warmbox: A focused warm-up tool for teams that need basic deliverability automation. Ranked #33 of 34 in Email Outreach Software by our editors (5.5/10); pricing: Paid; best for basic automated email warm-up.
At a glance
- Editor score5.5 / 10
- PricingPaid
- Best forBasic automated email warm-up
- Free planNo
- Paid from$15/mo
- Daily send limit50 emails/day
- Facts checked20 Sep 2026
Where it wins
- Automates warm-up exchanges, replies, and spam-folder removal
- Supports multiple inboxes, team members, and warm-up schedules
- Includes spam-score monitoring, DNS checks, and blacklist checks
Where it doesn't
- Focused on warm-up, not full outbound sequence management
- Daily warm-up limits top out at 500 emails
- No free plan; access is paid
Our verdict on Warmbox
Warmbox is a cloud-based email warm-up and deliverability service for sales and marketing teams. It connects with providers including Gmail, Outlook, Yahoo Mail, Amazon SES, Mailgun, and SMTP, then automates email exchanges and replies intended to improve sender reputation. Its feature set also covers spam-folder removal, inbox monitoring, configurable warm-up modes, scheduling by timezone and working hours, reporting, DNS checks, and blacklist checks. It is best suited to teams preparing inboxes for outreach rather than managing complete campaigns.
Pricing is available through annual and monthly billing. Annual plans start with Solo at $15 USD per month for 1 inbox, 50 emails per day, and 1 member. Start-up costs $69 USD per month for 3 inboxes, 250 emails per day, and 3 members, while Growth costs $139 USD per month for 6 inboxes, 500 emails per day, and 6 members. Monthly billing raises those prices to $19, $79, and $159 USD per month respectively, with the same inbox and daily-volume limits. Premium support is included with Solo and Start-up; Growth includes Enterprise support.
Warmbox’s strongest fit is a small sales or marketing team that needs automated inbox warm-up across common email services, with multi-inbox management as it expands. The configurable growth, flat, random, and custom modes provide more control than a basic single-setting warm-up tool, while deliverability checks add monitoring around the process. However, the product remains narrowly focused: it does not provide verified sequences, reply detection, or CRM functionality. Choose Warmbox for deliverability preparation and warm-up automation; choose a broader outbound platform if campaign sequencing, reply workflows, or customer relationship management are central requirements.
Your product? Our editors can test Warmbox in depth and publish a review, labelled as paid · from $149/mo →
Warmbox pricing
All 3 Warmbox plans and prices →
Warmbox fact sheet
| Free plan | No |
|---|---|
| Paid from | $15/mo |
| Outreach channels | Not verified |
| Mailbox limit | 1 mailboxes |
| Daily send limit | 50 emails/day |
| Email warm-up | Yes |
| Reply detection | Not verified |
| CRM synchronization | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Live chat, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 12 integrations: Gmail/Google Workspace, Outlook/Microsoft 365, Yahoo Mail, iCloud Mail, AOL Mail, Zoho Mail … See all → |
| Pricing | Paid (source) |
| Website | warmbox.ai |
| Facts checked | 20 Sep 2026 |
Warmbox integrations
Warmbox lists 12 integrations on its own site.
- Gmail/Google Workspace
- Outlook/Microsoft 365
- Yahoo Mail
- iCloud Mail
- AOL Mail
- Zoho Mail
- Yandex Mail
- SendGrid
- Brevo/Sendinblue
- Mailgun
- Amazon SES
- SMTP
See all Warmbox integrations →
Alternatives to Warmbox
- ApolloA broad B2B prospecting and outreach suite with data, sequences, dialing, and CRM sync.9.1
- MixmaxFree multichannel sequencing with paid tiers for deeper engagement and inbox workflows.8.8
- MailshakeA broad outreach platform with sequences, warm-up, testing, and multichannel sales tasks.8.7
See all Warmbox alternatives →
Also Ranked In
Warmbox is ranked in 2 of our directories.
Used Warmbox? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Warmbox for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Warmbox is listed in our Email Outreach Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/warmbox/"><img src="https://www.itechguides.com/best/badge/warmbox.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update