What is Mailmodo?

Mailmodo AI Subject Line Generator is a free tool that creates email subject lines in seconds. It lets users type a campaign brief, then adjust tone, intent, capitalization style, emoji usage, and personalization to match brand voice. The interface supports multiple email types—promotional, transactional, newsletter, launch, survey, and more—and allows selection of the recipient’s stage in the customer journey, from awareness to retention.

Generated subject lines can be tested with A/B experiments, and the platform tracks key metrics such as open rate, click‑through rate, unsubscribe rate, and spam complaints to measure effectiveness. The AI uses GPT‑3/4 models to produce concise, engaging subject lines that aim to boost engagement for email marketers, copywriters, and campaign managers.

Mailmodo on the web:

Mailmodo details

Company: Mailmodo Technologies Inc
Jurisdiction: United States of America
Built for: Individuals
Data residency: United States

Mailmodo tech specs

Works with: OpenAI / GPT
Integrations: Zapier HubSpot Shopify

Mailmodo pricing

Subscription

Lite $27/mo billed annually

Pro $79/mo billed annually

Custom $503

Max $custom

$39/mo is pricier than most for Email median $20/mo

Most Email tools start between $9.99 and $39 a month.

Auto-renewal: Yes

Trial, refund and renewal terms as stated in Mailmodo's own published documentation.

Verify on the official pricing page.

View plans

Mailmodo's key features

AI email template generator
AI email automation builder
AI segment generator
AI campaign analyzer
Interactive AMP emails
Managed deliverability solution
Email API services

Mailmodo use cases

Generate high‑converting subject lines for promotional email blasts, customizing tone, emojis, and personalization tags to boost open rates without manual copywriting.
Create personalized subject lines for drip campaigns across various customer journey stages, automatically adjusting intent and capitalization to match each segment’s context.
Run A/B subject line testing at scale, tracking opens, clicks, and spam metrics to iteratively optimize campaigns using the AI’s analytics dashboard.