Mailarrow vs TrulyInbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare Mailarrow (cold email platform) and TrulyInbox (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 sending outreach campaigns, starting at $39/mo with unlimited email warmup and unlimited mailboxes. TrulyInbox is an email warmup tool for building sender reputation and inbox placement, starting free and offering customizable reply rates from 10% to 65%. Many teams use both together since Mailarrow even integrates directly with TrulyInbox.
Key takeaways
- Mailarrow's entry plan costs $39/mo for 2,000 active prospects and 6,000 emails, while TrulyInbox offers a free tier with 1 email account and 10 warmup emails per day.
- TrulyInbox has 5 pricing tiers ranging from Free to $479/mo, compared to Mailarrow's 3 tiers ranging from $39/mo to $99/mo.
- TrulyInbox lists a customizable reply rate per plan ranging from 10% to 65%, along with real-time deliverability score tracking.
- Mailarrow lists unlimited email warmup and unlimited mailboxes on its plans, along with AI personalization and sending mailbox rotation.
- Mailarrow integrates directly with TrulyInbox, in addition to shared integrations like Gmail and Outlook that both tools support.
Reviewed and updated September 2, 2026
Mailarrow vs TrulyInbox: 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 TrulyInbox, 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; TrulyInbox 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 TrulyInbox lists unlimited email account connections on all paid plans and customizable reply rate per plan (10% to 65%).
TrulyInbox offers a lower entry point at $0/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 TrulyInbox. 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.
TrulyInbox is Cost-effective email warmup platform that supports unlimited inbox connections on paid plans, with customizable reply rates, ramp-up schedules, and real-time deliverability scoring.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Basic
Free
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
TrulyInbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 1 email account | 10 warmup emails/day |
| Starter | $29/mo | 3 email inboxes | 200 warmup emails/day |
| Growth | $99/mo | 15 email inboxes | 1,000 warmup emails/day |
| Scale | $199/mo | unlimited accounts connectable | 3,000 warmup emails/day |
| Scale Plus / Custom Plan | $479/mo | unlimited accounts connectable | 5,000 warmup emails/day |
Source: TrulyInbox Pricing
Pricing Analysis
TrulyInbox offers the lower entry point ($0/mo vs $39/mo). Teams watching their budget will appreciate the savings, especially when starting out.
TrulyInbox offers 5 pricing tiers compared to Mailarrow's 3, giving you more granularity as you scale.
TrulyInbox includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- and 4 more listed below
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- 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
TrulyInbox Key Features
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- Advanced warmup settings on higher plans
- Free forever plan with 1 inbox
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 TrulyInbox
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- Real-time deliverability score tracking
- Multiple email open simulation for natural engagement
- Advanced warmup settings on higher plans
- Free forever plan with 1 inbox
Integration Ecosystem
Mailarrow Integrations
Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
TrulyInbox Integrations
TrulyInbox connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail.
Shared Integrations
Both tools integrate with: Gmail, Outlook.
Integrations listed only by Mailarrow: Zoho, Zapier, TrulyInbox.
Integrations listed only by TrulyInbox: Google Workspace, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail.
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 TrulyInbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (7 integrations)
- Teams that want to start free and scale up as needs grow
Feature Comparison Summary
| Feature | Mailarrow | TrulyInbox |
|---|---|---|
| Starting Price | $39/mo | Free |
| Top Tier Price | $99/mo | $479/mo |
| Total Features Listed | 10 | 8 |
| Integrations | 5 | 7 |
| Founded | N/A | 2023 |
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 TrulyInbox the email domain warming and deliverability side. TrulyInbox offers a more accessible entry point, 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 TrulyInbox for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Mailarrow and TrulyInbox?
- Mailarrow is a cold email platform built for sending outreach campaigns and generating replies, while TrulyInbox is an email warmup tool built for improving sender reputation and inbox placement. They cover different parts of the outbound workflow, so many teams use both together rather than choosing one over the other.
- Which tool is cheaper, Mailarrow or TrulyInbox?
- TrulyInbox has the lower entry point at $0/mo with a free forever plan for 1 inbox, compared to Mailarrow's entry plan at $39/mo. TrulyInbox also offers more pricing tiers overall, five compared to Mailarrow's three, giving more granularity as usage scales.
- Do Mailarrow and TrulyInbox integrate with each other?
- Yes, Mailarrow lists TrulyInbox as one of its integrations, alongside Gmail, Outlook, Zoho, and Zapier. Both platforms also share Gmail and Outlook as common integrations, making it straightforward for teams to connect the two tools within the same outbound stack.
- Does TrulyInbox offer a free plan?
- Yes, TrulyInbox has a free forever plan that includes 1 email account and 10 warmup emails per day. Paid plans start at $29/mo and scale up to $479/mo, with unlimited email account connections available on all paid tiers.
- What features does Mailarrow offer that TrulyInbox does not list?
- Mailarrow lists features such as unlimited email warmup, unlimited mailboxes, AI personalization, sending mailbox rotation, detailed campaign analytics, and bulk prospects import. These are listed only on Mailarrow's own feature page and reflect its focus on running and tracking outreach campaigns rather than warmup alone.
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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