Email Subject Line Generator

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Email Subject Line Generator

Generate high-converting email subject lines for your B2B campaigns.

Configure Generator

Email Offer / Content

What is the email about? (e.g. free ABM audit, webinar invite)

Target Audience

Who are you emailing?

Tone

Choose the tone of the subject line

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Fill in the fields and click Generate to create your content.

Frequently Asked Questions

Everything you need to know about ai email subject line generator.

What makes a great B2B email subject line?

Effective B2B email subject lines are: specific (mention the recipient’s industry, role, or company); benefit-oriented (communicate what the reader will gain); concise (under 50 characters for mobile optimisation); personalised (include the recipient’s name or company when possible); and create urgency or curiosity without being clickbait. For cold outreach, relevance and personalisation are far more important than clever wordplay.

What is a good email open rate for B2B?

B2B email open rate benchmarks vary by type: cold outreach typically achieves 15–25% open rates; marketing nurture emails average 20–30%; newsletters average 25–35%; and triggered/transactional emails can reach 40–60%. These benchmarks have declined over recent years due to Apple Mail Privacy Protection, which inflates open rate data. Focus on click rates and reply rates as more reliable engagement metrics.

Should I use emojis in B2B email subject lines?

Emoji use in B2B email subject lines is context-dependent. For senior executive audiences (C-suite, VP-level), emojis can appear unprofessional and reduce open rates. For marketing, sales, and mid-level audiences, a single relevant emoji can increase open rates by 10–15% by creating visual differentiation in a crowded inbox. Always A/B test emoji vs. no-emoji versions for your specific audience.

How do I A/B test email subject lines?

For list sizes above 1,000 contacts, use a 20/20/60 split: send version A to 20%, version B to 20%, wait 4 hours, then send the winning version to the remaining 60%. For smaller lists, alternate between variants across multiple sends and compare open rates over time. Test one variable at a time (subject line length, personalisation, question vs. statement) to isolate what drives performance.

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