Side by side
Hiwriter vs Mailmerge-JS
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Generate perfect emails instantly with AI in Gmail
AI-powered Gmail automation for personalized emails
Primary task
Gmail email writing
Gmail email writing
Pricing
Free
Free
Pricing details
Free
Free
Billing cycle
Not documented
Not documented
API access
Not documented
Not documented
Platforms
Web
Web, CLI
Integrations
Gmail, Make
GitHub, Gmail
Source rating
No rating recorded
No rating recorded
Catalog views
2k
611
Estimated monthly traffic
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Catalog imported
30 Aug 2026
30 Aug 2026
Listed strengths
- Auto email generation
- Personalized email inputs
- Email reply generation
- Style and tone selector
- Translation feature
- Open-source package
- Command line tool
- Gmail inbox integration
- Simple email drafting
- Personalized, templated emails
Listed limitations
- No offline access
- Only integrates with Gmail
- Limited style/tone options
- Limited multi-language support
- Over-reliance on user inputs
- Limited to Gmail
- JavaScript knowledge required
- Command line operation
- Requires npm for setup
- Could have Gmail throttling