InboxWarm and Warmy both offer email warmup with volume-based pricing and free trials with no credit card required. InboxWarm provides transparent per-inbox pricing starting at $25/month with published tiers up to 100 inboxes. Warmy uses a volume-based model with B2B and B2C sender network options. InboxWarm differentiates with its active spam recovery engine and a 10-day free trial. For senders who want upfront transparent pricing and active spam recovery, InboxWarm is a strong choice.
Feature-by-Feature Comparison
Every key feature compared side-by-side. Green badges = InboxWarm wins.
| Feature | InboxWarm | Warmy |
|---|---|---|
| Starting Price (1 inbox) | $25/inbox/mo | Volume-based / contact for pricing |
| Pricing at 10 inboxes | $150/mo ($15/inbox) | Volume-based pricing |
| Pricing at 50 inboxes | $600/mo ($12/inbox) | Volume-based pricing |
| Volume Discounts | Up to 60% off | Volume-based pricing model |
| Free Trial | 10 days · No CC required | 7 days · No CC required |
| AI-Powered Replies | LLM-driven | Yes |
| Spam Recovery Engine | Active real-time | Passive / diagnostic |
| Spam Testing / Diagnostics | Basic health checks | Advanced (paid add-on) |
| Inbox Placement Tracking | Yes | Advanced |
| Domain Health Monitoring | Real-time | SPF/DKIM checks |
| Inbox Network | Private seed network | B2B & B2C mailbox networks |
| Gmail & Outlook Support | Both | Both |
| SMTP / IMAP Support | Yes | Yes |
| Platform Lock-in | None | None |
| Setup Time | 2 minutes | Standard setup |
Pricing Compared
See exactly how costs stack up at every inbox count.
| Inbox Count | InboxWarm / Mo | Warmy / Mo | You Save / Yr |
|---|---|---|---|
| 1 inbox | $25/mo | Volume-based | — |
| 5 inboxes | $100/mo | Volume-based | — |
| 10 inboxes | $150/mo | Volume-based | — |
| 25 inboxes | $300/mo | Volume-based | — |
| 50 inboxes | $600/mo | Volume-based | — |
| 100 inboxes | $1,000/mo | Volume-based | — |
Best Value at Scale
InboxWarm
Volume pricing that rewards growth
10-day trial · Cancel anytime · 2-minute setup
Warmy
Warmy
Volume-based pricing contact for rates
Warmy pricing sourced from public website, May 2026. Subject to change.
InboxWarm offers fully transparent volume pricing up to 100 inboxes published on its pricing page. Warmy uses a volume-based model contact their team for a quote. All InboxWarm features are included at every tier with no add-ons required.
Who Should Choose Which?
A fair, data-driven breakdown to help you decide.
Choose InboxWarm if…
- You manage 5+ inboxes and want significantly lower per-inbox costs
- You want active spam recovery alongside warmup (not just reporting)
- You want a 10-day free trial with no credit card required
- You need reliable warmup without paying for diagnostic extras
- You want 2-minute setup with no technical configuration
- You're an agency scaling across many client inboxes
Consider Warmy if…
- You need separate B2B and B2C sender network options tailored to your audience
- You want Google Postmaster integration and a dedicated deliverability expert
- You prefer working with a team to build a custom pricing plan for large volumes
- You need warmup for a very large or enterprise-scale inbox infrastructure
Key Differences, Explained
The details that matter most when choosing between the two tools.
Volume Pricing The Biggest Financial Difference
InboxWarm offers fully transparent per-inbox pricing starting at $25/month with published volume tiers, dropping to $10/inbox for 51–100 inboxes. Warmy uses a volume-based pricing model for both B2B and B2C sender categories, requiring contact with their team for a quote. InboxWarm's published pricing allows straightforward cost comparison and planning, which is a practical advantage for agencies budgeting across client inboxes.
Spam Testing vs Spam Recovery Two Different Philosophies
Warmy's standout feature is its spam testing capability it sends test emails and shows you where they land across major providers, flagging content triggers, authentication issues, and keyword problems. This is powerful for diagnosing deliverability issues. InboxWarm takes a different approach with its active spam recovery engine: it actively detects and rescues warmup emails from spam folders in real time, generating positive engagement signals that improve placement over time. Diagnostics tell you what's wrong; active recovery fixes it continuously.
Inbox Placement Diagnostics
If you're experiencing persistent deliverability issues and need detailed content-level analysis checking specific words, subject lines, or HTML patterns against spam filters Warmy's diagnostics are more granular and provider-specific. InboxWarm focuses on warmup execution, domain health monitoring, and active spam recovery rather than providing manual content-level spam scoring. The right choice depends on whether you need a diagnostic tool or an automated warmup engine.
Free Trial & Barrier to Entry
InboxWarm offers a 10-day free trial with no credit card required and full feature access connect, warm up, and verify results before you commit a cent. Warmy's trial access is more restricted. If you're evaluating email warmup tools, the ability to test the full product risk-free for 10 days is a meaningful advantage when deciding which tool to adopt for your stack.
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Frequently Asked Questions
InboxWarm offers transparent per-inbox pricing starting at $25/inbox/month with published volume tiers dropping to $10/inbox at scale. Warmy uses a volume-based pricing model specific rates require contacting their team. Both tools offer free trials with no credit card required. For agencies that need predictable, published pricing, InboxWarm’s transparent tier structure is a practical advantage.
InboxWarm has three main advantages: (1) Fully transparent per-inbox volume pricing published on its website, dropping to $10/inbox at scale; (2) An active spam recovery engine that rescues emails from spam folders in real time; (3) A 10-day free trial (vs Warmy’s 7 days), both with no credit card required.
For agencies needing transparent, predictable pricing, InboxWarm is the stronger choice. Its volume tiers are fully published: $300/month for 25 inboxes, $600/month for 50 inboxes, $1,000/month for 100 inboxes all-inclusive with no add-ons. Warmy requires contacting their team for pricing at scale.
Yes. InboxWarm connects via Gmail OAuth or SMTP/IMAP credentials in under 2 minutes with no technical configuration required. Start a 10-day free trial with no credit card to test InboxWarm before cancelling your Warmy subscription there is no migration risk or downtime.
Nothing is lost. The sender reputation you built with Warmy lives with your domain and inbox, not with the tool, so it carries over when you switch. InboxWarm picks up from your current reputation and continues strengthening inbox placement without resetting your progress.
Yes. Switching is straightforward: connect your inboxes via Gmail or Outlook OAuth or SMTP/IMAP in under two minutes, with no DNS changes or data export from Warmy required. Start a 10-day free trial with no credit card to run InboxWarm before cancelling Warmy, so there's no downtime or migration risk.
It's not recommended. Running two warmup tools on one inbox can double the warmup volume and send conflicting engagement signals, which can confuse mailbox providers and hurt reputation. Pause Warmy on that inbox before warming it with InboxWarm for clean, reliable results.