GMass vs Warmy.io
Both are Email Marketing tools. Below, the differences that matter: verified pricing, editorial scores and who each one is really for.
GMass: GMass turns Gmail into a mail merge and cold email platform—send campaigns live from Google Sheets, no separate dashboard needed. Pricing: from from €17/mo. (data verified June 2026)
Warmy.io: Warmy.io automates email warm-up to improve deliverability and sender reputation for cold outreach. Pricing: from from $19/mo. (data verified June 2026)
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At a glance
 GMass ◆ |
 Warmy.io ◆ | |
|---|---|---|
| Rating | — | — |
| Pricing | from €17/mo | from $19/mo |
| Pricing model | Freemium | Freemium |
| Category | Email Marketing | |
| Visit website → | Visit website → | |
Editorial scorecard
Editorial score from our review methodology — not user ratings.
| Ease of use | 9.0 | 8.0 |
| Features depth | 7.5 | 7.5 |
| Value for money | 8.5 | 8.5 |
| Support quality | 7.0 | 7.0 |
| Integrations | 6.5 | 6.5 |
| Scalability | 7.0 | 8.0 |
| Documentation | 6.0 | 6.0 |
| Onboarding speed | 8.5 | 7.5 |
| Overall | 7.5 | 7.4 |
Frequently asked questions
What is GMass?
GMass turns Gmail into a mail merge and cold email platform—send campaigns live from Google Sheets, no separate dashboard needed.
What is Warmy.io?
Warmy.io automates email warm-up to improve deliverability and sender reputation for cold outreach.
How much do GMass and Warmy.io cost?
GMass: from €17/mo. Warmy.io: from $19/mo.
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