Stop Landing in Spam.
Start Landing in Inbox.
AI-powered email warmup that gradually builds your sender reputation. Reach the inbox, not the spam folder.
The Numbers Speak
Trusted by growing teams to land in the inbox, not the spam folder.
Mailboxes Warmed
Avg. Inbox Placement
Emails Delivered
Email Providers
Everything You Need to Reach the Inbox
From AI-powered warmup to advanced analytics, we've got your deliverability covered.
AI Email Generation
Natural, contextual emails that bypass spam filters. Powered by GPT-4.
4-Phase Warmup Algorithm
Gradual volume ramp over 45+ days. From 2 emails/day to full capacity.
Real-Time Reputation Scoring
Live monitoring of your sender reputation across all providers.
Multi-Provider Support
9 providers including Gmail, Outlook, Yahoo, SendGrid, Mailgun, and custom SMTP.
DNS Health Monitor
SPF, DKIM, DMARC checks with actionable fix recommendations.
White-Label Agency
Full sub-account system with custom branding and isolated client portals.
Auto-Reply System
60-80% reply rate with realistic timing delays between 30 min and 4 hours.
Spam-to-Inbox Rescue
Automatically detect and move warmup emails from spam to inbox.
See How We Compare
Feature-by-feature comparison with the top alternatives.
Updated March 2026| Feature | WarmupSleuth | Warmy.io | WarmupInbox |
|---|---|---|---|
| AI Email Generation | |||
| Email Providers | 9 | 3 | 2 |
| White-Label Agency | |||
| Multi-Plan per Org | |||
| REST API Access | |||
| DNS Health Monitor | |||
| Free Deliverability Tools | 11 | 3 | 0 |
| Reputation Scoring | |||
| Two-Factor Auth (2FA) | |||
| Custom Workflows | |||
| CRM Integrations | 3+ | 1 | 0 |
| Starting Price | $19/mo | $49/mo | $30/mo |
Pricing
Simple, Transparent Pricing
Start free, upgrade when you're ready. All plans include a 14-day free trial.
Free
- 1 mailbox
- Basic warmup
- Email reports
- Community support
- API access
- Custom domains
- White-label
Starter
or $16/mo billed yearly
- $19/mo per mailbox
- AI email generation
- DNS health monitor
- Priority support
- Basic analytics
- API access
- White-label
Pro
or $41/mo billed yearly
- $49/mo per mailbox
- 5 team members
- AI email generation
- Advanced analytics
- REST API access
- Webhook integrations
- Priority support
Max
or $83/mo billed yearly
- $99/mo per mailbox
- 15 team members
- Everything in Pro
- CRM integrations
- Custom workflows
- Dedicated support
- White-label
Enterprise
- $249/mo per mailbox
- 50+ team members
- Everything in Max
- White-label agency
- Custom onboarding
- SLA guarantee
- Dedicated account manager
Loved by Teams Everywhere
See what our customers have to say about their deliverability results.
“WarmupSleuth got our cold email inbox rate from 62% to 94% in just 3 weeks. The AI-generated content keeps our warmup emails looking natural.”
Sarah Chen
Head of Sales, TechFlow
“We switched from Warmy.io and saved 40% while getting better deliverability. The multi-provider support is a game changer.”
Marcus Rodriguez
Founder & CEO, GrowthPulse
“The white-label feature lets us offer warmup as our own service to clients. It's become a new revenue stream for our agency.”
Emily Watson
Email Marketing Lead, ScaleUp Agency
Frequently Asked Questions
Everything you need to know about email warmup and WarmupSleuth.
Still have questions?
Can't find what you're looking for? Our team typically responds within 2 hours.
Contact our support teamTrusted by 0+ teams worldwide
Ready to Reach the Inbox?
Join 10,000+ teams who trust WarmupSleuth to deliver their emails.