Side by side
GmailGPT vs Mailmerge-JS
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Write emails in 1 click using AI
AI-powered Gmail automation for personalized emails
Primary task
Gmail email writing
Gmail email writing
Pricing
Freemium · Free
Free
Pricing details
Free
Free
Billing cycle
One-time
Not documented
API access
Listed as available
Not documented
Platforms
Web
Web, CLI
Integrations
Gmail
GitHub, Gmail
Source rating
4.4 / 5 · 5 ratings
No rating recorded
Catalog views
6.3k
611
Estimated monthly traffic
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Catalog imported
30 Aug 2026
30 Aug 2026
Listed strengths
- Free Gmail add-on
- No sign-up required
- Flexible for formal or casual tones
- Generate, shorten, or lengthen emails
- Over 30 languages compatibility
- Open-source package
- Command line tool
- Gmail inbox integration
- Simple email drafting
- Personalized, templated emails
Listed limitations
- Only integrates with Gmail
- No offline usage
- Cannot edit God-given drafts
- No support for third-party apps
- Doesn't support multi-account switching
- Limited to Gmail
- JavaScript knowledge required
- Command line operation
- Requires npm for setup
- Could have Gmail throttling