Mailarrow vs Warmy: Cold Email Platform vs Email Warmup Tool Comparison
Compare Mailarrow (cold email platform) and Warmy (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailarrow is a cold email platform for outreach campaigns, starting at $39/mo, while Warmy is an email warmup tool for deliverability and sender reputation, priced through custom sales quotes. They solve different problems in the outbound stack, and many teams use both together rather than choosing one over the other.
Key takeaways
- Mailarrow's entry plan costs $39/mo for 2,000 active prospects and 6,000 emails, while its Growth plan costs $99/mo for 50,000 active prospects and 150,000 emails.
- Warmy uses contact sales, custom pricing across its B2B sender, B2C sender, and Custom plan tiers with no published list price.
- Mailarrow lists 10 features including unlimited email warmup, unlimited mailboxes, and AI personalization, while Warmy lists 8 features including email seed list and Google Postmaster integration.
- Mailarrow integrates with 5 tools including Gmail, Outlook, Zoho, Zapier, and TrulyInbox, while Warmy integrates with 6 tools including Google Workspace, Microsoft 365, and Yahoo.
- Gmail and Outlook are the only integrations shared between Mailarrow and Warmy.
Reviewed and updated September 2, 2026
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
Basic
B2B sender
Mailarrow Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $39/mo | 2,000 active prospects | 6,000 emails |
| Professional | $59/mo | 20,000 active prospects | 60,000 emails |
| Growth | $99/mo | 50,000 active prospects | 150,000 emails |
Source: Mailarrow Pricing
Warmy Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| B2B sender | Contact Sales | Reach Businesses | Volume-based pricing |
| B2C sender | Contact Sales | Reach Consumers | Volume-based pricing |
| Custom plan | Contact Sales | Custom Solution | Volume-based pricing |
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
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- and 4 more listed below
- 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
| Feature | Mailarrow | Warmy |
|---|---|---|
| Starting Price | $39/mo | Contact Sales |
| Top Tier Price | $99/mo | Contact Sales |
| Total Features Listed | 10 | 8 |
| Integrations | 5 | 6 |
Getting Started Checklist
- Define your cold email outreach and email domain warming and deliverability requirements and monthly budget
- Estimate your expected email sending volume and 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
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.
Frequently asked questions.
Frequently asked questions- What is the main difference between Mailarrow and Warmy?
- Mailarrow is a cold email platform built for sending outreach campaigns and generating replies, while Warmy is an email warmup tool focused on building sender reputation and improving inbox placement. Mailarrow users bring their own mailboxes and lists, while Warmy warms up domains and IPs using AI-driven automation and a mailbox network.
- How much does Mailarrow cost compared to Warmy?
- Mailarrow publishes an entry price of $39/mo, rising to $99/mo for its Growth plan. Warmy uses custom, contact-based pricing across its B2B sender, B2C sender, and Custom plan tiers, so the two cannot be compared on list price directly.
- Can Mailarrow and Warmy be used together?
- Yes, the article notes that many teams run one of each. Mailarrow handles cold email outreach and campaign sending, while Warmy handles domain warming and deliverability monitoring, so they address different parts of the outbound email stack rather than competing directly.
- Which integrations do Mailarrow and Warmy have in common?
- Mailarrow and Warmy both integrate with Gmail and Outlook. Beyond that, Mailarrow also connects with Zoho, Zapier, and TrulyInbox, while Warmy connects with Google Workspace, Microsoft 365, Yahoo, and Google Postmaster.
- Who should choose Warmy over Mailarrow?
- Warmy fits organizations with complex tech stacks needing broad integration support, enterprise buyers who prefer custom pricing and dedicated support, teams launching new email domains, and organizations recovering from deliverability issues, according to the article's use case recommendations.
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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