Mailarrow vs Reply.io: Cold Email Platform Comparison
Compare Mailarrow and Reply.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Mailarrow starts at $39/mo with three pricing tiers and lists unlimited mailboxes plus mailbox rotation, while Reply.io starts at $59/mo with four tiers and lists a 1 billion B2B contacts database and anti-spam deliverability suite. Mailarrow fits budget-conscious teams; Reply.io fits teams needing broad integrations and AI SDR capabilities.
Key takeaways
- Mailarrow's entry plan costs $39/mo for 2,000 active prospects and 6,000 emails, while Reply.io's entry plan costs $59/mo for 1,000 active contacts with unlimited emails.
- Reply.io offers four pricing tiers, including an AI SDR Starter plan at $800/mo, compared to Mailarrow's three tiers topping out at $99/mo for the Growth plan.
- Mailarrow integrates with five tools, Gmail, Outlook, Zoho, Zapier, and TrulyInbox, while Reply.io integrates with nine tools including HubSpot, Salesforce, and Pipedrive.
- Zapier is the only integration listed by both platforms according to each vendor's published integration list.
- Reply.io lists a 1 billion B2B contacts database and an anti-spam and deliverability suite as features not listed by Mailarrow, while Mailarrow lists unlimited mailboxes and sending mailbox rotation not listed by Reply.io.
Reviewed and updated September 2, 2026
Mailarrow vs Reply.io: Cold Email Platform Comparison
Mailarrow and Reply.io are both cold email platforms. Choosing between them depends on your team size, budget, and specific cold email outreach requirements. Here is what each vendor publishes about pricing, features, and integrations.
The Quick Answer
By each vendor's own wording, Mailarrow lists unlimited mailboxes and sending mailbox rotation, while Reply.io lists 1 billion b2b contacts database and anti-spam & deliverability suite. A capability both offer can appear under different names, so read both feature lists below.
Mailarrow offers a lower entry point at $39/mo compared to Reply.io at $59/mo.
If your priority is sending campaigns that land in the inbox and generate replies, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
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.
Reply.io is AI-powered sales engagement platform with 1B+ B2B contacts, multichannel sequences, and AI SDR capabilities.
Both platforms offer unlimited email warmup, ai personalization. Where they diverge is in their approach to pricing tiers and advanced capabilities.
Pricing Comparison
Basic
Email Volume
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
Reply.io Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Email Volume | $59/mo | 1,000 active contacts | Unlimited |
| Multichannel | $99/mo | Unlimited active contacts | Unlimited emails; 10 mailboxes |
| Agency Core | $210/mo | Unlimited clients & users | Unlimited mailboxes |
| AI SDR Starter | $800/mo | 1,000 active contacts | Unlimited mailboxes & warm-ups |
Source: Reply.io Pricing
Pricing Analysis
Mailarrow is more affordable at the entry level ($39/mo vs $59/mo). For teams with tight budgets or those just getting started with cold email outreach, this price difference matters.
Reply.io offers 4 pricing tiers compared to Mailarrow's 3, giving you more granularity as you scale.
Features Breakdown
- Unlimited Mailboxes
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- Custom properties
- Sending schedules
- and 2 more listed below
- Unlimited Email Warmup
- AI Personalization
- 1 billion B2B contacts database
- Anti-spam & deliverability suite
- LinkedIn automation (add-on)
- SMS and calls (add-on)
- AI SDR capabilities
- Multi-workspace for agencies
- and 1 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
Reply.io Key Features
- Unlimited email warmup
- 1 billion B2B contacts database
- Anti-spam & deliverability suite
- LinkedIn automation (add-on)
- SMS and calls (add-on)
- AI personalization
- AI SDR capabilities
- Multi-workspace for agencies
- 14-day free trial
Shared Capabilities
Both Mailarrow and Reply.io include:
- Unlimited Email Warmup
- AI Personalization
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 Mailboxes
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- Custom properties
- Sending schedules
- Advanced tracking
- Reply tracking
Listed only by Reply.io
- 1 billion B2B contacts database
- Anti-spam & deliverability suite
- LinkedIn automation (add-on)
- SMS and calls (add-on)
- AI SDR capabilities
- Multi-workspace for agencies
- 14-day free trial
Integration Ecosystem
Mailarrow Integrations
Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
Reply.io Integrations
Reply.io connects with: HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Zapier, Make, n8n.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by Mailarrow: Gmail, Outlook, Zoho, TrulyInbox.
Integrations listed only by Reply.io: HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Make, n8n.
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 Reply.io
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
- SDR teams focused on pipeline generation
Feature Comparison Summary
| Feature | Mailarrow | Reply.io |
|---|---|---|
| Starting Price | $39/mo | $59/mo |
| Top Tier Price | $99/mo | $800/mo |
| Total Features Listed | 10 | 9 |
| Integrations | 5 | 9 |
Getting Started Checklist
- Define your cold email outreach requirements and monthly budget
- Estimate your expected 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
Mailarrow and Reply.io both serve the cold email outreach market. Mailarrow offers a more accessible entry point at $39/mo, while Reply.io starts at $59/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 Reply.io for current information.
Frequently asked questions.
Frequently asked questions- How much does Mailarrow cost compared to Reply.io?
- Mailarrow's Basic plan starts at $39/mo for 2,000 active prospects and 6,000 emails. Reply.io's Email Volume plan starts at $59/mo for 1,000 active contacts with unlimited emails. Reply.io also offers an AI SDR Starter plan at $800/mo, the highest tier listed by either platform.
- Which platform has more pricing tiers?
- Reply.io offers four pricing tiers: Email Volume, Multichannel, Agency Core, and AI SDR Starter. Mailarrow offers three tiers: Basic, Professional, and Growth. This gives Reply.io more granularity for teams that want to scale, though Mailarrow's tiers are cheaper at each entry level.
- What integrations does each platform support?
- Mailarrow connects with Gmail, Outlook, Zoho, Zapier, and TrulyInbox, five integrations total. Reply.io connects with nine tools, including HubSpot, Salesforce, Pipedrive, Copper CRM, Zendesk Sell, Close, Zapier, Make, and n8n. Zapier is the only integration both platforms list.
- Which tool is better for agencies?
- Both platforms are recommended for agencies managing multiple client outreach programs. Reply.io lists an Agency Core plan at $210/mo with unlimited clients and users, plus a multi-workspace feature for agencies. Mailarrow is positioned as offering a wide, ten-item feature set at a lower price point for agency use.
- Does Reply.io offer a free trial?
- Yes, Reply.io lists a 14-day free trial as one of its key features. The article does not state whether Mailarrow offers a free trial, since it is not listed among Mailarrow's key features.
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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