Warmbox
Warmbox is an email warm-up tool designed to significantly improve email deliverability and sender reputation for cold email campaigns.
Our verdict
Who it's for
Warm up your cold email inbox to improve deliverability and avoid landing in spam.
Who should look elsewhere
No free tier available, only paid plans.
Pros
- +Significantly improves email deliverability and sender reputation.
- +Easy to set up with no technical skills required.
- +Offers highly customizable warm-up options and schedules.
- +Provides detailed analytics and monitoring for deliverability.
- +Supports a wide range of email service providers.
Cons
- −No free tier available, only paid plans.
- −Requires continuous use for optimal results, typically 15-30 days for initial warm-up.
Key features
- ✓Automated email warm-up
- ✓AI-powered realistic email interactions (GPT-4 & Hybrid)
- ✓Auto-remove emails from spam folder
- ✓Auto-reply to emails
- ✓Mark emails as favorite
- ✓Spam score monitoring
- ✓Growth, Flat, or Random warm-up options
- ✓Fully custom warm-up schedules
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Solo | $15 | month | 1 inbox warm-up; 50 emails/day; 1 member |
| Start-up | $69 | month | 3 inbox warm-up; 250 emails/day; 3 team members |
| Growth | $139 | month | 6 inbox warm-up; 500 emails/day; 6 team members |
| Team | — | month | Custom needs; Flexible plans; Any sending volumes |
| Solo | $19 | month | 1 inbox warm-up; 50 emails/day; 1 team member |
| Start-up | $79 | month | 3 inbox warm-up; 250 emails/day; 3 team members |
| Growth | $159 | month | 6 inbox warm-up; 500 emails/day; 6 team members |