Mailwarm vs Warmbox: Email Warmup Tool Comparison
Compare Mailwarm and Warmbox side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Mailwarm and Warmbox are both email deliverability tools, but they differ mainly on price and feature emphasis. Mailwarm starts at $79/mo with a wider listed feature set including authentication fix tools and blacklist detection. Warmbox starts at $19/mo with AI-powered interactions, customizable warmup recipes, and a real-time analytics dashboard.
Key takeaways
- Mailwarm's Starter plan costs $79/mo for 1 mailbox and up to 50 warmup emails a day, while Warmbox's Solo plan costs $19/mo for 1 inbox and 50 emails a day.
- Mailwarm's Scale plan costs $549/mo for 10 mailboxes, 5 users, and up to 500 warmup emails a day.
- Warmbox's Growth plan costs $159/mo for 6 inboxes and 500 emails a day.
- Mailwarm lists nine features on its own page including provider-level warmup, authentication fix tools, and blacklist detection across major databases.
- Warmbox integrates with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo Mail, Amazon SES, SMTP, and Zoho Mail, while Mailwarm integrates with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP.
Reviewed and updated September 2, 2026
Mailwarm vs Warmbox: Email Warmup Tool Comparison
Mailwarm and Warmbox compete head-to-head in the email domain warming and deliverability space. This guide compares their pricing tiers, feature sets, and integration ecosystems to help you make a confident decision.
The Quick Answer
By each vendor's own wording, Mailwarm lists b2b & b2c warm up and spam score monitoring, while Warmbox lists automated email warmup with ai-powered interactions and customizable warmup recipes and strategies. A capability both offer can appear under different names, so read both feature lists below.
Warmbox offers a lower entry point at $19/mo compared to Mailwarm at $79/mo.
If your priority is building sender reputation and improving inbox placement, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
Mailwarm is Email warmup and deliverability platform that generates engagement across a network of aged real inboxes and includes a deliverability expert on every plan. Each interaction produces several positive signals, such as marking as non-spam, opening, marking as important and replying.
Warmbox is AI-powered email warmup tool that automates inbox warming with customizable recipes, spam score monitoring, and detailed analytics dashboards to improve cold email deliverability.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Solo
Mailwarm Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $79/mo | 1 mailbox/SMTP to warm; 1 user | Up to 50 warmup emails/day |
| Growth | $189/mo | 3 mailboxes/SMTPs to warm; 2 users | Up to 200 warmup emails/day |
| Scale | $549/mo | 10 mailboxes/SMTPs to warm; 5 users | Up to 500 warmup emails/day |
| Tailored Plan | Contact Sales | unlimited mailboxes, users | unlimited warmup emails, and replies |
Source: Mailwarm Pricing
Warmbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Solo | $19/mo | 1 inbox warm-up; 1 team member | 50 emails/day |
| Start-up | $79/mo | 3 inbox warm-up; 3 team members | 250 emails/day |
| Growth | $159/mo | 6 inbox warm-up | 500 emails/day |
| Enterprise | Contact Sales | custom | custom |
Source: Warmbox Pricing
Pricing Analysis
Warmbox offers the lower entry point ($19/mo vs $79/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Features Breakdown
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- and 3 more listed below
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- and 2 more listed below
Mailwarm Key Features
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
Warmbox Key Features
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- Auto-reply, open, and favorite marking simulation
- Team collaboration with per-plan member limits
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by Mailwarm
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
Listed only by Warmbox
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- Auto-reply, open, and favorite marking simulation
- Team collaboration with per-plan member limits
Integration Ecosystem
Mailwarm Integrations
Mailwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
Warmbox Integrations
Warmbox connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo Mail, Amazon SES, SMTP, Zoho Mail.
Shared Integrations
Both tools integrate with: Gmail, Google Workspace, Outlook, Microsoft 365.
Integrations listed only by Mailwarm: Yahoo, Custom SMTP.
Integrations listed only by Warmbox: Yahoo Mail, Amazon SES, SMTP, Zoho Mail.
Use Case Recommendations
Best Fit for Mailwarm
- Teams that need a wide feature set (9 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Best Fit for Warmbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Mailwarm | Warmbox |
|---|---|---|
| Starting Price | $79/mo | $19/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 9 | 8 |
| Integrations | 6 | 8 |
Getting Started Checklist
- Define your email domain warming and deliverability requirements and monthly budget
- Estimate your expected warmup email volume to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
Mailwarm and Warmbox both serve the email domain warming and deliverability market. Warmbox offers a more accessible entry point at $19/mo, while Mailwarm starts at $79/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit Mailwarm and Warmbox for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Mailwarm or Warmbox?
- Warmbox is cheaper at the entry level, starting at $19/mo for its Solo plan compared to Mailwarm's Starter plan at $79/mo. Both vendors also offer higher tiers, with Mailwarm going up to $549/mo for its Scale plan and Warmbox up to $159/mo for its Growth plan.
- What do Mailwarm and Warmbox each offer for email warmup?
- Mailwarm lists B2B and B2C warmup, spam score monitoring, provider-level warmup, authentication fix tools, and blacklist detection, among other features. Warmbox lists automated email warmup with AI-powered interactions, customizable warmup recipes, spam score monitoring and blacklist checks, and a real-time analytics dashboard.
- Do Mailwarm and Warmbox integrate with Gmail and Outlook?
- Yes, both tools integrate with Gmail, Google Workspace, Outlook, and Microsoft 365. Mailwarm additionally supports Yahoo and Custom SMTP, while Warmbox additionally supports Yahoo Mail, Amazon SES, SMTP, and Zoho Mail.
- How many mailboxes can I warm up on each platform's entry plan?
- Mailwarm's Starter plan at $79/mo covers 1 mailbox or SMTP for 1 user with up to 50 warmup emails a day. Warmbox's Solo plan at $19/mo covers 1 inbox for 1 team member with 50 emails a day.
- Does Mailwarm include support from a deliverability expert?
- Yes, according to the article, Mailwarm includes a deliverability expert on every plan as part of its approach to generating engagement across a network of aged real inboxes.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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