Growbots vs MailWarm.io: Cold Email Platform vs Email Warmup Tool Comparison
Compare Growbots (cold email platform) and MailWarm.io (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Compare Growbots (cold email platform) and MailWarm.io (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Reviewed and updated September 4, 2026
Growbots vs MailWarm.io: Cold Email Platform vs Email Warmup Tool Comparison
Growbots (cold email platform) and MailWarm.io (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
Growbots is a cold email platform for cold email outreach; MailWarm.io is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, Growbots lists explore database of 180m+ prospects and email verification on import, and MailWarm.io lists p2p enabled and human review.
Growbots offers a lower entry point at $0/mo compared to MailWarm.io at $90/mo.
If your priority is sending campaigns that land in the inbox and generate replies, Growbots is the one built for it; for building sender reputation and improving inbox placement, that is MailWarm.io. Many teams run one of each.
Understanding the Core Difference
Growbots is Cold email software that finds prospects in a 180M+ contact database, warms up sending inboxes and automates outbound email campaigns. Also sells a Concierge service in which its own team runs the outbound process.
MailWarm.io is Email warmup tool for cold emails that exchanges warmup emails with real human inboxes, keeps replies in natural threads and connects mailboxes from 10+ email providers with auto-pilot scheduling. Not the same product as Mailwarm (mailwarm.com).
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Freemium
Basic
Growbots Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Freemium | Free | Basic Filters; partial access to the 180M+ prospect database | 20 email accounts; 3 sequences; up to 20 per email daily |
| Starter Outreach | $29/mo | Credits (Per Propsect) From $0.13 | Unlimited email accounts; unlimited sequences; up to 100 per email daily |
| Pro Outreach | $39/mo | Credits (Per Propsect) From $0.13 | Unlimited email accounts; unlimited sequences; up to 500 per email daily |
Source: Growbots Pricing
MailWarm.io Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $90/yr | 50 email inboxes warmup | upto 40 emails per day |
| Pro | $190/yr | Unlimited inboxes warmup | upto 80 emails per day |
Source: MailWarm.io Pricing
Pricing Analysis
Growbots is more affordable at the entry level ($0/mo vs $90/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.
Growbots offers 3 pricing tiers compared to MailWarm.io's 2, giving you more granularity as you scale.
Growbots includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- and 4 more listed below
- P2P enabled
- Human review
- Fully automated
- Premium support
- Auto-pilot mode Available.
- Auto Warmup Scheduling.
- and 2 more listed below
Growbots Key Features
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- Shared Inbox
- Out-Of-Office Rescheduling
- Warm Replies Detection
- Email Templates Generator
MailWarm.io Key Features
- P2P enabled
- Human review
- Fully automated
- Premium support
- Auto-pilot mode Available.
- Auto Warmup Scheduling.
- Anti-Spam technology
- Real human 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 Growbots
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- Shared Inbox
- Out-Of-Office Rescheduling
- Warm Replies Detection
- Email Templates Generator
Listed only by MailWarm.io
- P2P enabled
- Human review
- Fully automated
- Premium support
- Auto-pilot mode Available.
- Auto Warmup Scheduling.
- Anti-Spam technology
- Real human inbox.
Integration Ecosystem
Growbots Integrations
Growbots connects with: Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, IMAP.
MailWarm.io Integrations
MailWarm.io connects with: Yahoo, Outlook, AOL, SMTP, Gmail, ProtonMail, Zoho Mail, Apple Mail, FastMail.
Shared Integrations
Both tools integrate with: Gmail, Outlook, SMTP.
Integrations listed only by Growbots: Salesforce, HubSpot, Zapier, IMAP.
Integrations listed only by MailWarm.io: Yahoo, AOL, ProtonMail, Zoho Mail, Apple Mail, FastMail.
Use Case Recommendations
Best Fit for Growbots
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Teams that want to start free and scale up as needs grow
Best Fit for MailWarm.io
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
- Agencies managing warmup across multiple client domains
Feature Comparison Summary
| Feature | Growbots | MailWarm.io |
|---|---|---|
| Starting Price | Free | $90/yr |
| Top Tier Price | $39/mo | $190/yr |
| Total Features Listed | 10 | 8 |
| Integrations | 7 | 9 |
| Founded | 2014 | N/A |
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
Growbots serves the cold email outreach side of an outbound stack and MailWarm.io the email domain warming and deliverability side. Growbots offers a more accessible entry point, while MailWarm.io starts at $90/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 Growbots and MailWarm.io for current information.
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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