Head-to-head
GMass vs Klaviyo
Two leading email marketing tools, compared on pricing, features, and editorial fit. Updated for 2026.
At a glance
| GMass | Klaviyo | |
|---|---|---|
| Tagline | Send mass email, mail merge, and campaigns from inside Gmail | Email + SMS for ecommerce. |
| Pricing model | Paid | Freemium |
| Starts at | $20/mo | Free |
| Founded | — | 2012 |
| AI-native | ||
| Categories | Sales Engagement, Email Marketing | Email Marketing |
| Vendor claimed |
Quick take
Pick GMass if you need send mass email, mail merge, and campaigns from inside gmail. Pick Klaviyo if you need email + sms for ecommerce.
Browse more
GMass alternatives →
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Klaviyo alternatives →
Frequently asked
- Is GMass better than Klaviyo?
- It depends on your use case. GMass is send mass email, mail merge, and campaigns from inside gmail, while Klaviyo is email + sms for ecommerce. See the comparison above for which fits your team.
- What's the price difference between GMass and Klaviyo?
- GMass starts at $20/mo. Klaviyo starts at Free.
- Can I migrate from GMass to Klaviyo?
- Most tools in this category support data import via CSV. For complex migrations, both vendors offer onboarding assistance on higher-tier plans.