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

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

Mailarrow (cold email platform) and Warmy (email warmup tool) 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

Mailarrow is a cold email platform for cold email outreach; Warmy 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 Warmy lists email warm-up and email seed list.

Mailarrow publishes an entry price of $39/mo; Warmy uses custom pricing, so the two cannot be compared on list price.

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 Warmy. 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.

Warmy is Automated email deliverability tool that warms up domains and IPs with AI-driven automation and a network of business or consumer mailboxes. Adds Google Postmaster integration, seed lists, deliverability insights and email verification in the same platform.

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

Pricing Comparison

$39/moMailarrow entry plan

Basic

Contact SalesWarmy entry plan

B2B sender

Mailarrow Pricing (as of September 2026)

Source: Mailarrow Pricing

Warmy Pricing (as of September 2026)

Source: Warmy Pricing

Pricing Analysis

One or both platforms use custom or contact-based pricing for some tiers. Reach out to their sales teams for exact quotes based on your usage needs.

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

Warmy lists

• Email Warm-Up
• Email Seed List
• Deliverability Insights
• Google Postmaster Integration
• Email Verification
• Warmy API
• 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

Warmy Key Features

• Email Warm-Up
• Email Seed List
• Deliverability Insights
• Google Postmaster Integration
• Email Verification
• Warmy API
• Deliverability monitor
• Dedicated deliverability expert

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 Warmy

• Email Warm-Up
• Email Seed List
• Deliverability Insights
• Google Postmaster Integration
• Email Verification
• Warmy API
• Deliverability monitor
• Dedicated deliverability expert

Integration Ecosystem

Mailarrow Integrations

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

Warmy Integrations

Warmy connects with: Google Workspace, Microsoft 365, Gmail, Yahoo, Outlook, Google Postmaster.

Shared Integrations

Both tools integrate with: Gmail, Outlook.

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

Integrations listed only by Warmy: Google Workspace, Microsoft 365, Yahoo, Google Postmaster.

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 Warmy

• Organizations with complex tech stacks needing broad integration support (6 integrations)
• Enterprise buyers who prefer custom pricing and dedicated support
• Teams launching new email domains for outreach
• Organizations recovering from deliverability issues

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 Warmy the email domain warming and deliverability side. Mailarrow publishes an entry price of $39/mo, while Warmy uses custom pricing for its plans, so compare on features and on the quote you receive. 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 Warmy for current information.