Instantly vs MailRush.io: Cold Email Platform Comparison
Compare Instantly and MailRush.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Instantly and MailRush.io are both cold email platforms, but they differ on price and integrations. Instantly starts at $47/mo with 9 integrations including HubSpot and Salesforce, while MailRush.io starts at $19/mo with 4 integrations but lists 11 features versus Instantly's 8. Choose based on budget, integration needs, and feature priorities.
Key takeaways
- Instantly's entry plan is $47/mo (Growth), while MailRush.io's entry plan is $19/mo (Starter).
- Instantly offers 4 pricing tiers, while MailRush.io offers 3 pricing tiers.
- Instantly integrates with 9 tools including HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Clay, Slack, and Google Calendar.
- MailRush.io integrates with 4 tools: SMTP, IMAP, Zapier, and Webhooks.
- MailRush.io lists 11 features on its own page compared to Instantly's 8 listed features.
Reviewed and updated September 2, 2026
Instantly vs MailRush.io: Cold Email Platform Comparison
Instantly and MailRush.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, Instantly lists unlimited email accounts and unlimited email warmup, while MailRush.io lists unlimited senders and unlimited email warming. A capability both offer can appear under different names, so read both feature lists below.
MailRush.io offers a lower entry point at $19/mo compared to Instantly at $47/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
Instantly is Cold email platform with unlimited email accounts, unlimited warmup, and a 450M+ B2B lead database.
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
Growth
Starter
Instantly Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Growth | $47/mo | 1000 Uploaded Contacts | 5000 Emails Monthly |
| Hypergrowth | $97/mo | 25 000 Uploaded Contacts | 125,000 emails/month |
| Light Speed | $358/mo | 100 000 Uploaded Contacts | 500 000 Emails Monthly |
| Enterprise | Contact Sales | 100 000+ Uploaded Contacts | 500 000+ Emails Monthly |
Source: Instantly 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.
Instantly offers 4 pricing tiers compared to MailRush.io's 3, giving you more granularity as you scale.
Features Breakdown
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- and 2 more listed below
- Unlimited senders
- Unlimited email warming
- Email validation
- API access & Webhooks
- Zapier integrations
- Spintax support
- and 5 more listed below
Instantly Key Features
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- AI-powered features
- Dedicated IP rotation (Light Speed+)
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 Instantly
- Unlimited email accounts
- Unlimited email warmup
- Email verification
- Master inbox
- Campaign analytics
- A/B testing
- AI-powered features
- Dedicated IP rotation (Light Speed+)
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
Instantly Integrations
Instantly connects with: HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Clay, Slack, Google Calendar.
MailRush.io Integrations
MailRush.io connects with: SMTP, IMAP, Zapier, Webhooks.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by Instantly: HubSpot, Salesforce, Pipedrive, Make, n8n, Clay, Slack, Google Calendar.
Integrations listed only by MailRush.io: SMTP, IMAP, Webhooks.
Use Case Recommendations
Best Fit for Instantly
- Budget-conscious teams looking for an affordable cold email platform
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
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 | Instantly | MailRush.io |
|---|---|---|
| Starting Price | $47/mo | $19/mo |
| Top Tier Price | Contact Sales | $99/mo |
| Total Features Listed | 8 | 11 |
| Integrations | 9 | 4 |
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
Instantly and MailRush.io both serve the cold email outreach market. MailRush.io offers a more accessible entry point at $19/mo, while Instantly 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 Instantly and MailRush.io for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Instantly or MailRush.io?
- MailRush.io is cheaper at the entry level, starting at $19/mo compared to Instantly's $47/mo starting price. MailRush.io's top tier is $99/mo, while Instantly's top tier requires contacting sales for custom Enterprise pricing.
- Does Instantly or MailRush.io have more integrations?
- Instantly has more integrations, listing 9 total including HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Clay, Slack, and Google Calendar. MailRush.io lists 4 integrations: SMTP, IMAP, Zapier, and Webhooks. Zapier is the only integration shared by both platforms.
- Which platform has more features, Instantly or MailRush.io?
- MailRush.io lists 11 features on its own page, while Instantly lists 8. MailRush.io's features include API access, webhooks, Zapier integrations, spintax support, and unsubscription automation, while Instantly's features include AI-powered features, master inbox, and dedicated IP rotation on higher tiers.
- Who is Instantly best suited for?
- Instantly is best suited for organizations with complex tech stacks needing broad integration support across 9 integrations, budget-conscious teams looking for an affordable cold email platform, and enterprise buyers who prefer custom pricing and dedicated support.
- Who is MailRush.io best suited for?
- MailRush.io is best suited for budget-conscious teams, sales teams running high-volume outbound email campaigns, agencies managing multiple client outreach programs, and teams that need a wide feature set with 11 capabilities 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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