Steal These 7 Cold Email Subject Lines That Got 80% Open Rates
Get inspired by 7 proven cold email subject lines that consistently drive 80%+ open rates. Tested, simple, and ready to steal.
Last updated
Get inspired by 7 proven cold email subject lines that consistently drive 80%+ open rates. Tested, simple, and ready to steal.
Last updated
Let’s be real — the subject line makes or breaks your cold email. 🚨
If it doesn’t spark curiosity or interest, your message will never get read — no matter how brilliant the content is.
The good news? After analyzing thousands of campaigns and hundreds of split tests, we’ve narrowed down 7 subject lines that consistently hit 80%+ open rates.
And yes, you can steal them.
Email platforms have evolved. Gmail, Outlook, and spam filters are smarter. And so are readers.
Generic templates like “Quick question”
Overused phrases like “Opportunity” or “Follow up”
Anything that feels automated or salesy
Today, you need to stand out in 3–6 words — with clarity, value, or just enough intrigue.
Each of these subject lines comes from a real cold email campaign, tested at scale using SenderWiz's and tracking features.
✅ Personal
✅ Value-forward
✅ Feels casual, not pushy
Combines personalization + curiosity
Great for 1st-touch emails
Triggers relevance: the reader feels seen
Works well in tech and services
Sounds like a continuation, not a pitch
High re-engagement rate for follow-ups
Tailored to industry roles
Performs great in B2B SaaS, HR, and agency outreach
Soft ask, minimal pressure
Perfect for testing new campaigns
Sounds like a human, not a bot
Simple but highly relatable
Great subject lines are:
Short (under 9 words)
Conversational, not corporate
Curiosity-triggering, but not clickbait
Relevant to the recipient’s role or work
Even adding an emoji (sparingly!) can increase open rates — especially when it feels authentic to the message.
Imagine having 5–10 subject lines like these automatically rotating in your campaigns.
Test performance across versions
Avoid duplicate content flags
Keep emails looking organic
Instead of betting on one perfect line, you test many — and let the data decide.
🕒 Send at the right time
Mornings (8–10am) and mid-afternoons (1–3pm) perform best in B2B.
🧪 A/B test consistently
Keep the winners, drop the losers.
📬 Pair great subjects with clean sending
A killer subject line won’t help if your emails land in spam.
A subject line is just one line — but it’s the gateway to everything else. Nail it, and your cold emails finally get the attention they deserve.
These 7 proven lines are your starting point. Steal them, tweak them, rotate them, and watch what happens.
That’s exactly what SenderWiz users do every day — using the built-in feature to:
Tools like inside SenderWiz help ensure your delivery infrastructure is rock solid.
And if you’re using ? Rotating, testing, and tracking them is just a few clicks away. 😉