Mailarrow vs MailHeat: Cold Email Platform vs Email Warmup Tool Comparison

Mailarrow vs MailHeat: Cold Email Platform vs Email Warmup Tool Comparison

Mailarrow is a cold email platform; MailHeat is an email warmup tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: cold email outreach on one side, email domain warming and deliverability on the other. This guide lays out what each vendor publishes.

The Quick Answer

Mailarrow is a cold email platform for cold email outreach; MailHeat is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, Mailarrow lists unlimited email warmup and unlimited mailboxes, and MailHeat lists secure smtp connection and health & activity dashboard.

Mailarrow offers a lower entry point at $39/mo compared to MailHeat at $69.99/mo.

If your priority is sending campaigns that land in the inbox and generate replies, Mailarrow is the one built for it; for building sender reputation and improving inbox placement, that is MailHeat. Many teams run one of each.

Understanding the Core Difference

Mailarrow is Cold email outreach software with email warmup, AI personalization, unlimited sequences and unlimited connected mailboxes. Users bring their own mailboxes and prospect lists; Mailarrow does not sell leads or provide inboxes.

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.

The two platforms take different approaches to solving the same core challenge.

Pricing Comparison

$39/moMailarrow entry plan

Basic

$69.99/moMailHeat entry plan

Starter

Mailarrow Pricing (as of September 2026)

Source: Mailarrow Pricing

MailHeat Pricing (as of September 2026)

Source: MailHeat Pricing

Pricing Analysis

Mailarrow is more affordable at the entry level ($39/mo vs $69.99/mo). For teams with tight budgets or those just getting started with cold email outreach and email domain warming and deliverability, this price difference matters.

MailHeat offers 4 pricing tiers compared to Mailarrow's 3, giving you more granularity as you scale.

Features Breakdown

Mailarrow lists

• Unlimited Email Warmup
• Unlimited Mailboxes
• AI Personalization
• Sending mailbox rotation
• Detailed campaign analytics
• Bulk Prospects Import
• and 4 more listed below

MailHeat lists

• Secure SMTP connection
• Health & activity dashboard
• Gradual warmup pacing
• Email & chat support
• Deliverability expert consulting
• Free Deliverability Audit
• and 2 more listed below

Mailarrow Key Features

• Unlimited Email Warmup
• Unlimited Mailboxes
• AI Personalization
• Sending mailbox rotation
• Detailed campaign analytics
• Bulk Prospects Import
• Custom properties
• Sending schedules
• Advanced tracking
• Reply tracking

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

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 Mailarrow

• Unlimited Email Warmup
• Unlimited Mailboxes
• AI Personalization
• Sending mailbox rotation
• Detailed campaign analytics
• Bulk Prospects Import
• Custom properties
• Sending schedules
• Advanced tracking
• Reply tracking

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

Integration Ecosystem

Mailarrow Integrations

Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.

MailHeat Integrations

MailHeat connects with: SMTP, Gmail, Google Workspace, Microsoft 365, Outlook.

Shared Integrations

Both tools integrate with: Gmail, Outlook.

Integrations listed only by Mailarrow: Zoho, Zapier, TrulyInbox.

Integrations listed only by MailHeat: SMTP, Google Workspace, Microsoft 365.

Use Case Recommendations

Best Fit for Mailarrow

• Budget-conscious teams looking for an affordable cold email platform
• Teams that need a wide feature set (10 capabilities listed)
• Sales teams running high-volume outbound email campaigns
• Agencies managing multiple client outreach programs

Best Fit for MailHeat

• Enterprise buyers who prefer custom pricing and dedicated support
• Teams launching new email domains for outreach
• Organizations recovering from deliverability issues
• Agencies managing warmup across multiple client domains

Feature Comparison Summary

Getting Started Checklist

1. Define your cold email outreach and email domain warming and deliverability requirements and monthly budget
2. Estimate your expected email sending volume and warmup email volume to find the right tier
3. List the integrations your team currently relies on
4. Sign up for free trials or demos of both platforms
5. Run a small test with each tool before making a commitment
6. Evaluate the onboarding experience and support quality

Final Thoughts

Mailarrow serves the cold email outreach side of an outbound stack and MailHeat the email domain warming and deliverability side. Mailarrow offers a more accessible entry point at $39/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 Mailarrow and MailHeat for current information.