Warmbox

Name: Warmbox
Price: 139 USD

Paid Web

What Warmbox is

Warmbox connects to an inbox and sends and interacts with warm-up emails to raise sender reputation and email deliverability. It can remove messages from spam, open and bookmark them, and reply to some. Warm-up settings include growth, flat, random, or custom modes, with controls for scheduling, timing, daily volume, and reply rate. A dashboard reports sent emails, reply rate, spam score, schedule, and inbox reputation. Warmbox describes a private network of more than 35,000 inboxes across more than 100 countries. Listed providers include Gmail, Outlook, Yahoo, SendGrid, Sendinblue, SMTP, Amazon SES, Mailgun, iCloud, AOL, Zoho, and Yandex. A separate checker reviews IP and domain blacklist status and checks SPF, DKIM, and DMARC across more than 120 checkpoints; its feature page calls it free. The yearly Solo plan costs $15 a month for one inbox, 50 emails per day, and one member; monthly Solo billing is $19 a month. Warmbox estimates first results usually take 15–30 days of uninterrupted warming, depending on the address and provider.

Who it suits

Warmbox suits individuals or teams seeking to warm connected inboxes and monitor sender reputation. Agencies can add inboxes and team members and create dedicated brand workspaces.

What it does well

Automates several inbox warm-up interactions
Offers configurable scheduling and daily volume
Dashboard tracks spam score and inbox reputation
Lists providers including Gmail, Outlook, and SMTP
Blacklist and DNS checker is described as free

What to know first

No free plan
Yearly Solo plan covers one inbox
Warm-up results usually take 15–30 days
Team plan pricing requires contacting Warmbox

Limits

The Solo yearly plan costs $15 a month and supports one inbox, 50 emails per day, and one member. The Solo monthly plan costs $19 a month with the same listed inbox, volume, and member limits.

Plans

Plan	Billed and limits	Price
Growth (yearly billing)	Yearly billing · 6 inbox warm-up · 500 emails/day · 6 team members · Enterprise support	$139 a month
Solo (yearly billing)	Yearly billing · 1 inbox warm-up · 50 emails/day · 1 member · Premium support	$15 a month
Growth (monthly billing)	Monthly billing · 6 inbox warm-up · 500 emails/day · 6 team members · Enterprise support	$159 a month
Solo (monthly billing)	Monthly billing · 1 inbox warm-up · 50 emails/day · 1 team member · Premium support	$19 a month
Start-up (yearly billing)	Yearly billing · 3 inbox warm-up · 250 emails/day · 3 team members · Premium support	$69 a month
Start-up (monthly billing)	Monthly billing · 3 inbox warm-up · 250 emails/day · 3 team members · Premium support	$79 a month
Team	Custom needs · Contact for pricing	On request

As warmbox.ai lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Open the Warmbox website
Connect a supported inbox or email provider
Choose a warm-up mode and configure scheduling, timing, volume, and reply rate
Select a paid plan
Monitor activity and reputation in the dashboard

Verdict

Warmbox pairs automated inbox warming with controls and deliverability monitoring, plus a separate blacklist and DNS checker. The yearly Solo plan starts at $15 a month, and the stated estimate for initial results is 15–30 days of uninterrupted warming.

Questions

Does Warmbox have a free plan?

No. Warmbox is a paid product. Its DNS and blacklist checker is described as free.

What platforms does Warmbox support?

Warmbox is available on the web.

Which email providers can connect?

Listed providers include Gmail, Outlook, Yahoo, SendGrid, Sendinblue, SMTP, Amazon SES, Mailgun, iCloud, AOL, Zoho, and Yandex.

How much does the Solo plan cost?

Solo costs $15 a month with yearly billing or $19 a month with monthly billing.

What support is included?

All plans include in-app chat support and an online help center. Some sales subscribers may qualify for personalized onboarding and an account manager.

Facts from Warmbox's own pages

Agency features: The product page says users can add inboxes and team members and create dedicated brand workspaces for agencies. · warmbox.ai, 8 Oct 2026
DNS and blacklist checker: Its checker audits IP and domain blacklist status and inspects SPF, DKIM, and DMARC using more than 120 checkpoints; the feature page calls it free. · warmbox.ai, 8 Oct 2026
Email providers: Listed providers include Gmail, Outlook, Yahoo, SendGrid, Sendinblue, SMTP, Amazon SES, Mailgun, iCloud, AOL, Zoho, and Yandex. · warmbox.ai, 8 Oct 2026
Headquarters: Tallinn, Estonia · warmbox.ai, 28 Sept 2026
Mailbox data handling: Warmbox says it processes service-generated warm-up emails and technical deliverability signals, not the content of users’ other correspondence, and does not sell this data or use it for advertising. · warmbox.ai, 8 Oct 2026
Monitoring: The dashboard reports sent emails, reply rate, spam score, warm-up schedule, and inbox reputation. · warmbox.ai, 8 Oct 2026
Network: Warmbox describes a private network of more than 35,000 inboxes spanning more than 100 countries. · warmbox.ai, 8 Oct 2026
Privacy compliance: The pricing FAQ states that Warmbox meets GDPR and CCPA requirements for personal data storage and use. · warmbox.ai, 8 Oct 2026
Purpose: Warmbox says it automatically sends and interacts with emails from a connected inbox to raise sender reputation and email deliverability. · warmbox.ai, 8 Oct 2026
Security: The privacy policy describes TLS and at-rest encryption, encrypted mailbox credentials, access controls, production access monitoring, backups, independent penetration tests, and SOC 2 Type II compliance. · warmbox.ai, 8 Oct 2026
Support: The pricing FAQ says all plans include in-app chat support and an online help center; some sales subscribers may qualify for personalized onboarding and an account manager. · warmbox.ai, 8 Oct 2026
Warm-up actions: It sends warm-up emails, removes them from spam, opens and bookmarks them, and replies to some messages. · warmbox.ai, 8 Oct 2026
Warm-up controls: Warm-up options include growth, flat, random, and custom settings, with scheduling and configurable timing, daily volume, and reply rate. · warmbox.ai, 8 Oct 2026
Warm-up duration: Warmbox estimates that first results usually take 15–30 days of uninterrupted warming, depending on the email address and provider. · warmbox.ai, 8 Oct 2026