Warmbox.ai — Marketing & SEO ◆

What is Warmbox.ai?

Warmbox.ai is an email warm-up tool that prevents cold emails from landing in spam. By simulating natural email activity—sending, opening, replying, and removing from spam—it builds sender reputation with providers like Gmail, Outlook, Yahoo, and custom SMTP. The result: higher inbox placement rates for outreach campaigns.

Who is it for?

It is ideal for sales teams, marketers, and founders sending cold emails at scale who struggle with deliverability. It is less suited for casual personal email senders with low volume needs.

Real use cases

Sales teams use Warmbox.ai to warm up new domains before outreach. Marketers integrate it with tools like Mailchimp and HubSpot to maintain reputation during campaigns. Founders rely on its private inboxes network of +35,000 accounts to accelerate warming across multiple email providers.

• Automated Warm-Up — Sends and replies to emails from your address to build reputation
• Multi-Provider Support — Works with Gmail, Outlook, Yahoo, iCloud, Amazon SES, SMTP, and more
• Realistic AI Interactions — Uses GPT-4 to generate human-like emails, replies, and spam removal
• Deliverability Monitoring — Dashboard shows inbox placement rate, spam score, and bounce rate
• Customizable Schedules — Set daily send limits and choose growth, flat, or random warm-up patterns
• Private Inboxes Network — Access to +35,000 inboxes to boost reputation safely
• Live Email Checker — DNS and blacklist monitoring for your domain

Warmbox.ai pricing: from $15/mo. Billing model: Freemium.

For comparison: the median starting price in Marketing & SEO is $29/month, measured across 753 tools we track. See the full SaaS Pricing Index →

Solo - $15/month (yearly) / $19/month (monthly)

1 inbox warm-up, 50 emails/day, 1 team member, premium support.

Start-up - $69/month (yearly) / $79/month (monthly)

3 inbox warm-up, 250 emails/day, 3 team members, premium support.

Growth - $139/month (yearly) / $159/month (monthly)

6 inbox warm-up, 500 emails/day, 6 team members, enterprise support.

Team - Custom plans

For agencies and enterprises with higher sending volumes. Contact via chat for pricing.

All plans include a free trial (no credit card required). Features like GPT-4 interactions, private inboxes network, and live email checker are included across all tiers.

See current Warmbox.ai pricing and plans →