Mailwarm vs ReachInbox: Email Warmup Tool vs Cold Email Platform Comparison
Compare Mailwarm (email warmup tool) and ReachInbox (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailwarm is a dedicated email warmup and deliverability tool starting at $79/mo, using a network of aged real inboxes to build sender reputation. ReachInbox is a cold email outreach platform starting free, offering unlimited email accounts, AI warmup, and AI-personalized campaigns from a unified inbox. Many teams run both together.
Key takeaways
- Mailwarm's Starter plan costs $79/mo and supports warming 1 mailbox with up to 50 warmup emails per day.
- ReachInbox's Free Plan costs $0/mo and includes 50 active leads and 250 emails per month.
- ReachInbox offers 5 pricing tiers, compared with Mailwarm's 4.
- Mailwarm integrates with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP.
- ReachInbox integrates with GoHighLevel, n8n, Zapier, Make, Slack, Pabbly, and Activepieces.
Reviewed and updated September 2, 2026
Mailwarm vs ReachInbox: Email Warmup Tool vs Cold Email Platform Comparison
Mailwarm is an email warmup tool; ReachInbox 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
Mailwarm is an email warmup tool for email domain warming and deliverability; ReachInbox is a cold email platform for cold email outreach. By each vendor's own wording, Mailwarm lists b2b & b2c warm up and spam score monitoring, and ReachInbox lists unlimited e-mail accounts and unlimited ai warmup.
ReachInbox offers a lower entry point at $0/mo compared to Mailwarm at $79/mo.
If your priority is building sender reputation and improving inbox placement, Mailwarm is the one built for it; for sending campaigns that land in the inbox and generate replies, that is ReachInbox. Many teams run one of each.
Understanding the Core Difference
Mailwarm is Email warmup and deliverability platform that generates engagement across a network of aged real inboxes and includes a deliverability expert on every plan. Each interaction produces several positive signals, such as marking as non-spam, opening, marking as important and replying.
ReachInbox is Cold outreach platform that connects unlimited email accounts, warms them up, and runs AI-personalized campaigns from a unified inbox. Adds a lead finder, website visitor identification and inbox placement tests as separate product tabs.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Free Plan
Mailwarm Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $79/mo | 1 mailbox/SMTP to warm; 1 user | Up to 50 warmup emails/day |
| Growth | $189/mo | 3 mailboxes/SMTPs to warm; 2 users | Up to 200 warmup emails/day |
| Scale | $549/mo | 10 mailboxes/SMTPs to warm; 5 users | Up to 500 warmup emails/day |
| Tailored Plan | Contact Sales | unlimited mailboxes, users | unlimited warmup emails, and replies |
Source: Mailwarm Pricing
ReachInbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free Plan | Free | 50 Active Leads/mo | 250 Emails/mo |
| Starter Plan | $39/mo | 2,000 Active Leads/mo | 10,000 E-mails/mo |
| Growth Plan | $99/mo | 50,000 Active Leads/mo | 250,000 Emails/mo |
| Pro Plan | $299/mo | 200,000 Active Leads/mo | 1 Million Emails/mo |
| Enterprise Plan | Contact Sales | 500,000 Active Leads | 1 M Emails Monthly |
Source: ReachInbox Pricing
Pricing Analysis
ReachInbox offers the lower entry point ($0/mo vs $79/mo). Teams watching their budget will appreciate the savings, especially when starting out.
ReachInbox offers 5 pricing tiers compared to Mailwarm's 4, giving you more granularity as you scale.
ReachInbox includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- and 3 more listed below
- Unlimited E-mail Accounts
- Unlimited AI Warmup
- Hyper-Personalization
- AI Enrichment
- AI Replies
- Webhooks
- and 5 more listed below
Mailwarm Key Features
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
ReachInbox Key Features
- Unlimited E-mail Accounts
- Unlimited AI Warmup
- Hyper-Personalization
- AI Enrichment
- AI Replies
- Webhooks
- API Access and Integrations
- White Labeling
- Lead Finder
- Website Visitor Identification
- Inbox Placement Tests
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 Mailwarm
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
Listed only by ReachInbox
- Unlimited E-mail Accounts
- Unlimited AI Warmup
- Hyper-Personalization
- AI Enrichment
- AI Replies
- Webhooks
- API Access and Integrations
- White Labeling
- Lead Finder
- Website Visitor Identification
- Inbox Placement Tests
Integration Ecosystem
Mailwarm Integrations
Mailwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
ReachInbox Integrations
ReachInbox connects with: GoHighLevel, n8n, Zapier, Make, Slack, Pabbly, Activepieces.
Integrations listed only by Mailwarm: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
Integrations listed only by ReachInbox: GoHighLevel, n8n, Zapier, Make, Slack, Pabbly, Activepieces.
Use Case Recommendations
Best Fit for Mailwarm
- Enterprise buyers who prefer custom pricing and dedicated support
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
- Agencies managing warmup across multiple client domains
Best Fit for ReachInbox
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (11 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (7 integrations)
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Mailwarm | ReachInbox |
|---|---|---|
| Starting Price | $79/mo | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 9 | 11 |
| Integrations | 6 | 7 |
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
Mailwarm serves the email domain warming and deliverability side of an outbound stack and ReachInbox the cold email outreach side. ReachInbox offers a more accessible entry point, while Mailwarm starts at $79/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 Mailwarm and ReachInbox for current information.
Frequently asked questions.
Frequently asked questions- What's the actual difference between Mailwarm and ReachInbox?
- Mailwarm is an email warmup tool focused on domain warming and deliverability, using engagement across a network of aged real inboxes. ReachInbox is a cold outreach platform that connects unlimited email accounts, warms them up, and runs AI-personalized campaigns from a unified inbox, with added lead finding and website visitor identification tools.
- How much does Mailwarm cost?
- Mailwarm's Starter plan is $79/mo for 1 mailbox and up to 50 warmup emails a day. Growth costs $189/mo for 3 mailboxes and up to 200 warmup emails a day, Scale costs $549/mo for 10 mailboxes and up to 500 warmup emails a day, and a Tailored Plan with unlimited mailboxes requires contacting sales.
- How much does ReachInbox cost?
- ReachInbox has a Free Plan at $0/mo covering 50 active leads and 250 emails a month. Paid tiers include Starter at $39/mo, Growth at $99/mo, and Pro at $299/mo, with an Enterprise Plan available by contacting sales for 500,000 active leads and 1 million emails monthly.
- Can I use Mailwarm and ReachInbox together?
- Yes, since they address different parts of the same workflow. Mailwarm handles domain warming and inbox reputation while ReachInbox handles the actual cold outreach campaigns, and the article notes that many teams run one of each rather than choosing exclusively.
- What integrations does each platform offer?
- Mailwarm connects with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP. ReachInbox connects with GoHighLevel, n8n, Zapier, Make, Slack, Pabbly, and Activepieces, reflecting its focus on outreach workflow automation rather than mailbox-level connections.
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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