Inboxy vs Mailarrow: Email Warmup Tool vs Cold Email Platform Comparison
Compare Inboxy (email warmup tool) and Mailarrow (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Inboxy is an email warmup tool for domain warming and deliverability, priced at $47/mo for its single Pro plan covering Gmail and Office 365 inboxes. Mailarrow is a cold email platform starting at $39/mo across three tiers, offering unlimited email warmup, unlimited mailboxes, and AI personalization for sending outreach campaigns.
Key takeaways
- Inboxy's Pro plan costs $47/mo and includes 120 daily emails per inbox for Gmail and Office 365 accounts.
- Mailarrow's Basic plan costs $39/mo for 2,000 active prospects and 6,000 emails, with Professional at $59/mo and Growth at $99/mo.
- Mailarrow publishes three pricing tiers while Inboxy publishes only one.
- Inboxy lists nine integrations including Mailgun, GoDaddy, and Sendgrid, while Mailarrow lists five including Zapier and TrulyInbox.
- Mailarrow lists ten features such as unlimited email warmup and AI personalization, compared to nine features listed by Inboxy.
Reviewed and updated September 2, 2026
Inboxy vs Mailarrow: Email Warmup Tool vs Cold Email Platform Comparison
Inboxy is an email warmup tool; Mailarrow is a cold email platform. Whether you need one, the other, or both depends on which part of the workflow you are buying for: email domain warming and deliverability on one side, cold email outreach on the other. This guide lays out what each vendor publishes.
The Quick Answer
Inboxy is an email warmup tool for email domain warming and deliverability; Mailarrow is a cold email platform for cold email outreach. By each vendor's own wording, Inboxy lists primary inbox supercharger and domain score iq monitoring, and Mailarrow lists unlimited email warmup and unlimited mailboxes.
Mailarrow offers a lower entry point at $39/mo compared to Inboxy at $47/mo.
If your priority is building sender reputation and improving inbox placement, Inboxy is the one built for it; for sending campaigns that land in the inbox and generate replies, that is Mailarrow. Many teams run one of each.
Understanding the Core Difference
Inboxy is Email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation. It runs warmup through a private network of headless browsers with AI-driven adjustments to sending metrics.
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.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Inboxy Pro
Basic
Inboxy Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Inboxy Pro | $47/mo | Gmail and Office 365 Inboxes | 120 Daily Emails Per Inbox |
Source: Inboxy Pricing
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
Pricing Analysis
Mailarrow offers the lower entry point ($39/mo vs $47/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Mailarrow offers 3 pricing tiers compared to Inboxy's 1, giving you more granularity as you scale.
Features Breakdown
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- and 3 more listed below
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- and 4 more listed below
Inboxy Key Features
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
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
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 Inboxy
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
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
Integration Ecosystem
Inboxy Integrations
Inboxy connects with: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
Mailarrow Integrations
Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
Integrations listed only by Inboxy: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
Integrations listed only by Mailarrow: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
Use Case Recommendations
Best Fit for Inboxy
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
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
Feature Comparison Summary
| Feature | Inboxy | Mailarrow |
|---|---|---|
| Starting Price | $47/mo | $39/mo |
| Top Tier Price | $47/mo | $99/mo |
| Total Features Listed | 9 | 10 |
| Integrations | 9 | 5 |
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
Inboxy serves the email domain warming and deliverability side of an outbound stack and Mailarrow the cold email outreach side. Mailarrow offers a more accessible entry point at $39/mo, while Inboxy starts at $47/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 Inboxy and Mailarrow for current information.
Frequently asked questions.
Frequently asked questions- What's the difference between Inboxy and Mailarrow?
- Inboxy is an email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation, while Mailarrow is a cold email platform for sending outreach campaigns with built-in warmup, AI personalization, and unlimited mailboxes. They address different parts of the outreach workflow.
- How much does Inboxy cost?
- Inboxy costs $47/mo for its Pro plan, which covers Gmail and Office 365 inboxes with 120 daily emails per inbox. Inboxy publishes only one pricing tier, unlike Mailarrow which offers three.
- How much does Mailarrow cost?
- Mailarrow starts at $39/mo for its Basic plan, covering 2,000 active prospects and 6,000 emails. Higher tiers include Professional at $59/mo for 20,000 prospects and 60,000 emails, and Growth at $99/mo for 50,000 prospects and 150,000 emails.
- Can I use Inboxy and Mailarrow together?
- Yes, many teams run both tools since they solve different problems: Inboxy warms up domains and improves sender reputation, while Mailarrow handles sending cold email campaigns. Mailarrow also includes its own unlimited email warmup feature as part of its platform.
- Which integrations does each tool support?
- Inboxy connects with nine services including Personal Gmail, Google Workspace, Mailgun, GoDaddy, Inboxroad, Sendgrid, and Custom SMTP. Mailarrow connects with five services: Gmail, Outlook, Zoho, Zapier, and TrulyInbox.
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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