Here's something that works almost every time and almost nobody does it.
Instead of your subject line being about your product, make it about the reader's job.
Not "New feature: automated workflows" - that's about you.
Not "Increase productivity with [Product]" - still about you.
"For ops managers scaling to 50 seats" - that's about them.
A B2B SaaS in the project management space tested this across a list of 22,000 users. They segmented by job title using signup data, then wrote subject lines that named the role directly. Open rates went from 24% to 38%. Click-through rates doubled.
The psychology is simple: we're all tuned to notice our own name in a crowd. Our job title is close enough. In a cluttered inbox, "For growth marketers running small teams" reads like someone wrote it specifically for you, because they did.
What makes it work:
It signals relevance before the email is even open
It self-selects engaged readers (the right people open, wrong people don't, and that's actually good for deliverability)
It doesn't require any copywriting skill. You're just stating who the email is for.
The only requirement: you need to know who's on your list. Most B2B SaaS already collects job title or company size at signup. If you don't, ask for it in onboarding. One additional field is worth more than 20 A/B tests on button colors.
THE STEAL
Pull your last 90 days of signups. Find the 2-3 job titles that represent 60%+ of your user base.
Segment your list by those titles. (In most ESPs this takes 5 minutes.)
Write three versions of your next email… same body, three different subject lines, each naming a different role.
Send. Measure open rate and click through by segment.
Roll the winner format into your default template.
That's it. Takes an afternoon to set up. Runs on autopilot after that.
Next Sunday: the two sentence landing page test that outperforms 90% of homepages.
Forward this to someone who'd use it.
— The Sunday Marketer