MailRush.io vs Mailwarm: Cold Email Platform vs Email Warmup Tool Comparison
Compare MailRush.io (cold email platform) and Mailwarm (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
MailRush.io is a cold email platform priced from $19 per month for sending outreach campaigns and follow-ups. Mailwarm is a separate email warmup tool priced from $79 per month for building sender reputation and inbox placement. They solve different jobs, MailRush.io sends, Mailwarm warms domains, and many teams run both together.
Key takeaways
- MailRush.io's Starter plan costs $19/mo and covers up to 1,000 contacts and up to 5,000 emails per month.
- Mailwarm's Starter plan costs $79/mo and supports 1 mailbox with up to 50 warmup emails per day.
- MailRush.io lists 11 features on its own page, including unlimited senders and unlimited email warming.
- Mailwarm lists 9 features, including spam score monitoring and progressive volume ramp-up to avoid spam filters.
- Mailwarm offers 4 pricing tiers while MailRush.io offers 3 pricing tiers.
Reviewed and updated September 2, 2026
MailRush.io vs Mailwarm: Cold Email Platform vs Email Warmup Tool Comparison
MailRush.io (cold email platform) and Mailwarm (email warmup tool) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
MailRush.io is a cold email platform for cold email outreach; Mailwarm is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, MailRush.io lists unlimited senders and unlimited email warming, and Mailwarm lists b2b & b2c warm up and spam score monitoring.
MailRush.io offers a lower entry point at $19/mo compared to Mailwarm at $79/mo.
If your priority is sending campaigns that land in the inbox and generate replies, MailRush.io is the one built for it; for building sender reputation and improving inbox placement, that is Mailwarm. Many teams run one of each.
Understanding the Core Difference
MailRush.io is Cold email software that automates outreach and multi-step follow-ups from your own SMTP/IMAP mailboxes or MailRush-provided sending accounts. Email warmup and email validation are included in every plan.
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.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Starter
MailRush.io Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $19/mo | Up to 1,000 contacts | Up to 5,000 emails per month; up to 1,000 emails per day |
| Pro | $39/mo | Up to 30,000 contacts | Up to 10,000 emails per month; up to 1,500 emails per day |
| Scale | $99/mo | Up to 50,000 contacts | Up to 25,000 emails per month; up to 3,000 emails per day |
Source: MailRush.io Pricing
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
Pricing Analysis
MailRush.io is more affordable at the entry level ($19/mo vs $79/mo). For teams with tight budgets or those just getting started with cold email outreach and email domain warming and deliverability, this price difference matters.
Mailwarm offers 4 pricing tiers compared to MailRush.io's 3, giving you more granularity as you scale.
Features Breakdown
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- and 5 more listed below
- 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
MailRush.io Key Features
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- Email follow-ups
- Suppression list
- Email copy spam assessment
- Email personalization
- Unsubscription automation
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
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 MailRush.io
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- Email follow-ups
- Suppression list
- Email copy spam assessment
- Email personalization
- Unsubscription automation
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
Integration Ecosystem
MailRush.io Integrations
MailRush.io connects with: SMTP, IMAP, Zapier, Webhooks.
Mailwarm Integrations
Mailwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
Integrations listed only by MailRush.io: SMTP, IMAP, Zapier, Webhooks.
Integrations listed only by Mailwarm: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
Use Case Recommendations
Best Fit for MailRush.io
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (11 capabilities listed)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Best Fit for Mailwarm
- Organizations with complex tech stacks needing broad integration support (6 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Feature Comparison Summary
| Feature | MailRush.io | Mailwarm |
|---|---|---|
| Starting Price | $19/mo | $79/mo |
| Top Tier Price | $99/mo | Contact Sales |
| Total Features Listed | 11 | 9 |
| Integrations | 4 | 6 |
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
MailRush.io serves the cold email outreach side of an outbound stack and Mailwarm the email domain warming and deliverability side. MailRush.io offers a more accessible entry point at $19/mo, 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 MailRush.io and Mailwarm for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between MailRush.io and Mailwarm?
- MailRush.io is a cold email platform built for sending outreach campaigns and multi-step follow-ups, while Mailwarm is an email warmup tool focused on building sender reputation and inbox placement. MailRush.io does include email warmup in its own plans, so the two overlap somewhat but serve different primary purposes.
- How much does MailRush.io cost compared to Mailwarm?
- MailRush.io starts at $19 per month for its Starter plan, while Mailwarm starts at $79 per month for its Starter plan. MailRush.io's Starter plan covers up to 1,000 contacts and 5,000 emails per month, while Mailwarm's Starter plan covers 1 mailbox with up to 50 warmup emails per day.
- Do I need both MailRush.io and Mailwarm?
- Many teams run both, since MailRush.io focuses on sending campaigns that generate replies while Mailwarm focuses on warming domains and improving deliverability. MailRush.io does include unlimited email warming in its own plans, so some teams may not need a separate warmup tool depending on their setup.
- What integrations does each tool support?
- MailRush.io connects with SMTP, IMAP, Zapier, and Webhooks. Mailwarm connects with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP. The two lists don't overlap, reflecting their different focuses on sending outreach versus warming mailboxes.
- Which tool has more pricing tiers?
- Mailwarm offers 4 pricing tiers, Starter, Growth, Scale, and a Tailored Plan, compared to MailRush.io's 3 tiers, Starter, Pro, and Scale. Mailwarm's extra tier gives more granularity for teams scaling their mailbox warmup needs.
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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