MailRush.io vs TrulyInbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare MailRush.io (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.
MailRush.io is a cold email platform for outreach and follow-ups, while TrulyInbox is an email warmup tool for building sender reputation and deliverability. MailRush.io starts at $19/mo with unlimited senders and unlimited email warming; TrulyInbox starts free and offers unlimited email account connections on paid plans with customizable reply rates from 10% to 65%. Many teams use both.
Key takeaways
- MailRush.io's entry plan costs $19/mo and includes up to 1,000 contacts and up to 5,000 emails per month.
- TrulyInbox offers a free plan with 1 email account and 10 warmup emails per day.
- TrulyInbox's Scale plan costs $199/mo and connects unlimited email accounts with 3,000 warmup emails per day.
- MailRush.io integrates with SMTP, IMAP, Zapier, and Webhooks, while TrulyInbox integrates with Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, and Yahoo Mail.
- TrulyInbox lists customizable reply rates ranging from 10% to 65% per plan.
Reviewed and updated September 2, 2026
MailRush.io vs TrulyInbox: Cold Email Platform vs Email Warmup Tool Comparison
MailRush.io is a cold email platform; TrulyInbox is an email warmup tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: cold email outreach on one side, email domain warming and deliverability on the other. This guide lays out what each vendor publishes.
The Quick Answer
MailRush.io 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, MailRush.io lists unlimited senders and unlimited email warming, 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 MailRush.io at $19/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 TrulyInbox. 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.
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
Starter
Free
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
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 $19/mo). Teams watching their budget will appreciate the savings, especially when starting out.
TrulyInbox offers 5 pricing tiers compared to MailRush.io'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 senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- and 5 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
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
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 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 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
MailRush.io Integrations
MailRush.io connects with: SMTP, IMAP, Zapier, Webhooks.
TrulyInbox Integrations
TrulyInbox connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail.
Shared Integrations
Both tools integrate with: SMTP.
Integrations listed only by MailRush.io: IMAP, Zapier, Webhooks.
Integrations listed only by TrulyInbox: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, Yahoo Mail.
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 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 | MailRush.io | TrulyInbox |
|---|---|---|
| Starting Price | $19/mo | Free |
| Top Tier Price | $99/mo | $479/mo |
| Total Features Listed | 11 | 8 |
| Integrations | 4 | 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
MailRush.io 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 MailRush.io starts at $19/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 TrulyInbox for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between MailRush.io and TrulyInbox?
- MailRush.io is a cold email platform built for sending outreach campaigns and multi-step follow-ups, while TrulyInbox is an email warmup tool focused on building sender reputation and improving inbox placement. MailRush.io also includes email warmup and validation in every plan, whereas TrulyInbox specializes solely in warmup and deliverability scoring.
- Which tool is cheaper, MailRush.io or TrulyInbox?
- TrulyInbox has the lower entry point at $0/mo with its free plan, compared to MailRush.io's Starter plan at $19/mo. However, TrulyInbox's paid plans go up to $199/mo for the Scale tier and $479/mo for the Scale Plus custom plan, so total cost depends on the features needed.
- Can I use MailRush.io and TrulyInbox together?
- Yes, the article notes that many teams run one of each since they serve different parts of the same workflow. MailRush.io handles cold email outreach while TrulyInbox handles email domain warming and deliverability, so combining them covers both sending and inbox placement needs.
- Does MailRush.io include email warmup features on its own?
- Yes, MailRush.io lists unlimited email warming and email validation as included in every plan alongside its cold email outreach features. This means teams using MailRush.io already get warmup functionality built in, without needing a separate tool for that specific purpose.
- What integrations does each platform support?
- MailRush.io connects with SMTP, IMAP, Zapier, and Webhooks. TrulyInbox connects with Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, and Yahoo Mail. The only integration shared by both tools, according to their published integration lists, is SMTP.
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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