MailHeat vs MailRush.io: Email Warmup Tool vs Cold Email Platform Comparison
Compare MailHeat (email warmup tool) and MailRush.io (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Compare MailHeat (email warmup tool) and MailRush.io (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Reviewed and updated September 4, 2026
MailHeat vs MailRush.io: Email Warmup Tool vs Cold Email Platform Comparison
MailHeat (email warmup tool) and MailRush.io (cold email platform) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
MailHeat is an email warmup tool for email domain warming and deliverability; MailRush.io is a cold email platform for cold email outreach. By each vendor's own wording, MailHeat lists secure smtp connection and health & activity dashboard, and MailRush.io lists unlimited senders and unlimited email warming.
MailRush.io offers a lower entry point at $19/mo compared to MailHeat at $69.99/mo.
If your priority is building sender reputation and improving inbox placement, MailHeat is the one built for it; for sending campaigns that land in the inbox and generate replies, that is MailRush.io. Many teams run one of each.
Understanding the Core Difference
MailHeat is Inbox warmup and deliverability platform that simulates the positive engagement mailbox providers reward across a warmup pool, with gradual pacing, a per-inbox health dashboard and deliverability expert consulting on the higher tiers.
MailRush.io is Cold email software that automates outreach and multi-step follow-ups from your own SMTP/IMAP mailboxes or MailRush-provided sending accounts. Email warmup and email validation are included in every plan.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Starter
MailHeat Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $69.99/mo | 1 account to warm (1 SMTP); 1 user | Up to 50 emails/day |
| Growth | $159.99/mo | Up to 3 accounts to warm (3 SMTPs); 2 users | Up to 200 emails/day per inbox |
| Scale | $479.99/mo | Up to 10 accounts to warm (10 SMTPs); 5 users | Up to 500 emails/day per inbox |
| Tailored Plan | Contact Sales | Unlimited accounts & SMTPs; unlimited users | Unlimited emails/day |
Source: MailHeat Pricing
MailRush.io Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $19/mo | Up to 1,000 contacts | Up to 5,000 emails per month; up to 1,000 emails per day |
| Pro | $39/mo | Up to 30,000 contacts | Up to 10,000 emails per month; up to 1,500 emails per day |
| Scale | $99/mo | Up to 50,000 contacts | Up to 25,000 emails per month; up to 3,000 emails per day |
Source: MailRush.io Pricing
Pricing Analysis
MailRush.io offers the lower entry point ($19/mo vs $69.99/mo). Teams watching their budget will appreciate the savings, especially when starting out.
MailHeat offers 4 pricing tiers compared to MailRush.io's 3, giving you more granularity as you scale.
Features Breakdown
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- and 2 more listed below
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- and 5 more listed below
MailHeat Key Features
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- Success Manager
- Free tools
MailRush.io Key Features
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- Email follow-ups
- Suppression list
- Email copy spam assessment
- Email personalization
- Unsubscription automation
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 MailHeat
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- Success Manager
- Free tools
Listed only by MailRush.io
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- Email follow-ups
- Suppression list
- Email copy spam assessment
- Email personalization
- Unsubscription automation
Integration Ecosystem
MailHeat Integrations
MailHeat connects with: SMTP, Gmail, Google Workspace, Microsoft 365, Outlook.
MailRush.io Integrations
MailRush.io connects with: SMTP, IMAP, Zapier, Webhooks.
Shared Integrations
Both tools integrate with: SMTP.
Integrations listed only by MailHeat: Gmail, Google Workspace, Microsoft 365, Outlook.
Integrations listed only by MailRush.io: IMAP, Zapier, Webhooks.
Use Case Recommendations
Best Fit for MailHeat
- Organizations with complex tech stacks needing broad integration support (5 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Best Fit for MailRush.io
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (11 capabilities listed)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | MailHeat | MailRush.io |
|---|---|---|
| Starting Price | $69.99/mo | $19/mo |
| Top Tier Price | Contact Sales | $99/mo |
| Total Features Listed | 8 | 11 |
| Integrations | 5 | 4 |
Getting Started Checklist
- Define your email domain warming and deliverability and cold email outreach requirements and monthly budget
- Estimate your expected warmup email volume and email sending 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
MailHeat serves the email domain warming and deliverability side of an outbound stack and MailRush.io the cold email outreach side. MailRush.io offers a more accessible entry point at $19/mo, while MailHeat starts at $69.99/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 MailHeat and MailRush.io for current information.
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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