Mailarrow vs Warmforge: Cold Email Platform vs Email Warmup Tool Comparison
Compare Mailarrow (cold email platform) and Warmforge (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailarrow and Warmforge serve different parts of an outbound stack: Mailarrow is a cold email platform for sending outreach campaigns, starting at $39/mo, while Warmforge is an email warmup tool for building sender reputation and inbox placement, starting at $12/mo. Teams often use both together rather than choosing one.
Key takeaways
- Mailarrow's entry plan costs $39/mo and includes 2,000 active prospects and 6,000 emails, while its Growth plan at $99/mo covers 50,000 active prospects and 150,000 emails.
- Warmforge's Email Warm Up plan costs $12/mo per slot, with 1 free slot included and 1 free placement test per month.
- Warmforge lists Placement Tests Pro at $39/mo for 50 mailboxes per test and Placement Tests Growth at $169/mo for 250 mailboxes with unlimited tests.
- Mailarrow integrates with Gmail, Outlook, Zoho, Zapier, and TrulyInbox, while Warmforge integrates with Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge, and Mailforge.
- Both tools list Gmail and Outlook as shared integrations, but each has features unique to its own list, such as Mailarrow's AI Personalization and Warmforge's Heat Score per mailbox.
Reviewed and updated September 2, 2026
Mailarrow vs Warmforge: Cold Email Platform vs Email Warmup Tool Comparison
Sales teams building an outbound stack often weigh Mailarrow, a cold email platform for cold email outreach, against Warmforge, an email warmup tool for email domain warming and deliverability. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
Mailarrow is a cold email platform for cold email outreach; Warmforge 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 Warmforge lists email warm up and monitoring & health checks.
Warmforge offers a lower entry point at $12/mo compared to Mailarrow at $39/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 Warmforge. 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.
Warmforge is Email warm up tool from the Forge Ecosystem that warms mailboxes with AI-written emails and tracks a per-mailbox Heat Score. Adds DNS, MX and blacklist health checks, placement tests and automatic removal of warm-up mail that lands in spam.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Basic
Email Warm Up (per slot)
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
Warmforge Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Email Warm Up (per slot) | $12/mo | 1 slot covers 1 mailbox; 1 free slot included | Automated AI email warm up; 1 free placement test per month |
| Placement Tests Pro Plan | $39/mo | 50 mailboxes per test | 100 tests per month |
| Placement Tests Growth Plan | $169/mo | 250 mailboxes per test | Unlimited tests |
Source: Warmforge Pricing
Pricing Analysis
Warmforge offers the lower entry point ($12/mo vs $39/mo). Teams watching their budget will appreciate the savings, especially when starting out.
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
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- 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
Warmforge Key Features
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
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 Warmforge
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
Integration Ecosystem
Mailarrow Integrations
Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
Warmforge Integrations
Warmforge connects with: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native).
Shared Integrations
Both tools integrate with: Gmail, Outlook.
Integrations listed only by Mailarrow: Zoho, Zapier, TrulyInbox.
Integrations listed only by Warmforge: Google Workspace, Microsoft 365, Salesforge (native), Mailforge (native).
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 Warmforge
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (6 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Feature Comparison Summary
| Feature | Mailarrow | Warmforge |
|---|---|---|
| Starting Price | $39/mo | $12/mo |
| Top Tier Price | $99/mo | $169/mo |
| Total Features Listed | 10 | 8 |
| Integrations | 5 | 6 |
| Founded | N/A | 2024 |
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 Warmforge the email domain warming and deliverability side. Warmforge offers a more accessible entry point at $12/mo, while Mailarrow starts at $39/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 Warmforge for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Mailarrow and Warmforge?
- Mailarrow is a cold email platform built for sending outreach campaigns, with features like AI personalization and unlimited mailboxes. Warmforge is an email warmup tool focused on domain warming and deliverability, tracking a per-mailbox Heat Score and running DNS, MX, and blacklist health checks.
- Which tool is cheaper, Mailarrow or Warmforge?
- Warmforge has the lower entry price at $12/mo per slot compared to Mailarrow's $39/mo Basic plan. However, the plans cover different things: Warmforge's entry tier covers one mailbox for warmup, while Mailarrow's entry tier covers 2,000 active prospects and 6,000 emails.
- Can I use Mailarrow and Warmforge together?
- Yes, many teams run both tools since they cover different parts of the outbound workflow. Mailarrow handles sending cold email campaigns while Warmforge handles warming up mailboxes and monitoring deliverability, so using them together covers both sending and inbox placement.
- What integrations does each tool support?
- Mailarrow integrates with Gmail, Outlook, Zoho, Zapier, and TrulyInbox. Warmforge integrates with Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge, and Mailforge. Both tools share Gmail and Outlook as common integrations.
- Who should choose Warmforge over Mailarrow?
- Warmforge fits teams launching new email domains for outreach or recovering from deliverability issues, since it focuses on building sender reputation and inbox placement. It also suits organizations with complex tech stacks that need broad integration support, listing 6 integrations.
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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