Inboxy vs MailRush.io: Email Warmup Tool vs Cold Email Platform Comparison
Compare Inboxy (email warmup tool) and MailRush.io (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Inboxy is an email warmup tool for domain warming and deliverability, priced from $47/mo with one plan. MailRush.io is a cold email platform for outreach campaigns, priced from $19/mo across three tiers and includes warmup and validation on every plan. Many teams use both together rather than choosing one over the other.
Key takeaways
- Inboxy's only listed plan, Inboxy Pro, costs $47/mo and covers Gmail and Office 365 inboxes with 120 daily emails per inbox.
- MailRush.io offers three pricing tiers: Starter at $19/mo, Pro at $39/mo, and Scale at $99/mo.
- MailRush.io's Starter plan supports up to 1,000 contacts and up to 5,000 emails per month, while Scale supports up to 50,000 contacts and up to 25,000 emails per month.
- Inboxy lists 9 integrations including Personal Gmail, Google Workspace, Mailgun, GoDaddy, Inboxroad, and Sendgrid, while MailRush.io lists 4: SMTP, IMAP, Zapier, and Webhooks.
- MailRush.io includes email warmup and email validation in every plan, in addition to features like unlimited senders and spintax support.
Reviewed and updated September 2, 2026
Inboxy vs MailRush.io: Email Warmup Tool vs Cold Email Platform Comparison
Sales teams building an outbound stack often weigh Inboxy, an email warmup tool for email domain warming and deliverability, against MailRush.io, a cold email platform for cold email outreach. 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
Inboxy is an email warmup tool for email domain warming and deliverability; MailRush.io is a cold email platform for cold email outreach. By each vendor's own wording, Inboxy lists primary inbox supercharger and domain score iq monitoring, and MailRush.io lists unlimited senders and unlimited email warming.
MailRush.io offers a lower entry point at $19/mo compared to Inboxy at $47/mo.
If your priority is building sender reputation and improving inbox placement, Inboxy is the one built for it; for sending campaigns that land in the inbox and generate replies, that is MailRush.io. Many teams run one of each.
Understanding the Core Difference
Inboxy is Email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation. It runs warmup through a private network of headless browsers with AI-driven adjustments to sending metrics.
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.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Inboxy Pro
Starter
Inboxy Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Inboxy Pro | $47/mo | Gmail and Office 365 Inboxes | 120 Daily Emails Per Inbox |
Source: Inboxy Pricing
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
Pricing Analysis
MailRush.io offers the lower entry point ($19/mo vs $47/mo). Teams watching their budget will appreciate the savings, especially when starting out.
MailRush.io offers 3 pricing tiers compared to Inboxy's 1, giving you more granularity as you scale.
Features Breakdown
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- and 3 more listed below
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- and 5 more listed below
Inboxy Key Features
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
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
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 Inboxy
- Primary Inbox Supercharger
- Domain Score IQ Monitoring
- AI Powered Inbox Adjustments
- Dynamic Email Scheduling
- Live Inbox Engagement Feed
- AI Generated Emails (GPT-3)
- IP Warm Up Service
- SMTP Warm Up Service
- Inbox Placement Test
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
Integration Ecosystem
Inboxy Integrations
Inboxy connects with: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
MailRush.io Integrations
MailRush.io connects with: SMTP, IMAP, Zapier, Webhooks.
Integrations listed only by Inboxy: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.
Integrations listed only by MailRush.io: SMTP, IMAP, Zapier, Webhooks.
Use Case Recommendations
Best Fit for Inboxy
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
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
Feature Comparison Summary
| Feature | Inboxy | MailRush.io |
|---|---|---|
| Starting Price | $47/mo | $19/mo |
| Top Tier Price | $47/mo | $99/mo |
| Total Features Listed | 9 | 11 |
| Integrations | 9 | 4 |
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
Inboxy serves the email domain warming and deliverability side of an outbound stack and MailRush.io the cold email outreach side. MailRush.io offers a more accessible entry point at $19/mo, while Inboxy starts at $47/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 Inboxy and MailRush.io for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between Inboxy and MailRush.io?
- Inboxy is an email warmup tool focused on domain warming and deliverability, using a private network of headless browsers with AI-driven adjustments. MailRush.io is a cold email platform that automates outreach and multi-step follow-ups from your own SMTP/IMAP mailboxes or MailRush-provided sending accounts, with warmup and validation included in every plan.
- Which is cheaper, Inboxy or MailRush.io?
- MailRush.io has the lower entry price at $19/mo for its Starter plan, compared to Inboxy's single plan, Inboxy Pro, at $47/mo. MailRush.io also offers two additional tiers, Pro at $39/mo and Scale at $99/mo, giving more pricing granularity as usage scales.
- Can I use Inboxy and MailRush.io together?
- Yes, the article notes that many teams run one of each since the tools cover different parts of the outbound workflow. Inboxy focuses on building sender reputation and inbox placement, while MailRush.io focuses on sending campaigns and generating replies.
- What integrations does Inboxy support compared to MailRush.io?
- Inboxy connects with 9 integrations: Personal Gmail, Google Workspace, Outlook/Office via SMTP and OAuth, Mailgun, GoDaddy, Inboxroad, Sendgrid, and Custom SMTP. MailRush.io connects with 4: SMTP, IMAP, Zapier, and Webhooks.
- Is MailRush.io suitable for high-volume outbound campaigns?
- Yes, MailRush.io is recommended for sales teams running high-volume outbound email campaigns and agencies managing multiple client outreach programs. Its Scale plan supports up to 50,000 contacts and up to 25,000 emails per month, which is the highest tier listed.
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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