Every founder doing cold outreach eventually googles the average email open rate, looking for a number to measure themselves against. You’ll find one, usually quoted somewhere between fifteen and twenty-five percent depending on the industry, and then you’ll discover the number is almost useless for deciding anything. The average email open rate is a blend of newsletters, marketing blasts, and transactional mail across millions of senders who look nothing like you, so treating it as your target is like comparing your jog time to an average that includes both toddlers and Olympic sprinters.
That doesn’t mean opens are worthless to think about. It means you have to understand what the benchmark actually measures before you let it tell you whether your outreach is working.
What the average email open rate really tells you
The headline benchmarks lump together wildly different kinds of email. A newsletter people opted into opens very differently from a cold pitch to a stranger. A receipt opens near a hundred percent. Marketing blasts to a stale list open in the single digits. The “average” smears all of that into one figure, which is why your cold outreach to forty hand-picked founders simply can’t be judged against it. Your real benchmark is your own past sends to similar people, not an internet number built from everyone.
There’s also a measurement problem nobody mentions. Open tracking relies on a tiny invisible image loading, and privacy features now block or auto-load that image constantly, which means open rates are inflated for some recipients and invisible for others. The number you see is fuzzy at best, so building strategy on small open-rate differences is building on sand.
Opens are a vanity metric in disguise
Here’s the uncomfortable part: a high open rate feels like success and often means nothing. A clever subject line can get half your list to open and zero to reply, because opening costs nothing and tells you nothing about intent. The only metrics that matter for founder outreach are replies and conversations, the things that actually move toward revenue. Chase opens and you’ll optimize for curiosity. Chase replies and you’ll optimize for relevance, which is the thing that actually pays.
So if you’re going to track one number, track reply rate. It’s harder to game, impossible to fake with a gimmick subject line, and it points straight at whether your message and your targeting are landing.
What actually moves the number that matters
Replies come from relevance, not trickery. The biggest lever isn’t your subject line or your send time, it’s whether the person on the other end actually has the problem you’re writing about. A plain subject line to someone who’s hurting beats a brilliant one to someone who isn’t, every time. So the energy founders pour into squeezing another point out of their open rate is almost always better spent making sure they’re emailing the right people in the first place.
For the related trap of judging yourself against opt-in benchmarks, this piece on what counts as a good email open rate covers why the “good” number depends entirely on context and why founders misread it.
The benchmark you actually want is targeting
Step back and the whole open-rate conversation is a distraction from the real driver. Whether people open, reply, and buy is decided mostly before you write a word, by who’s receiving the email. Get the targeting right and even a mediocre email performs. Get it wrong and a perfect one dies quietly, no matter what the average says you should expect.
That’s the part we built Unbound Compute to fix: finding the specific people showing the problem you solve, so your outreach reaches inboxes where it’s relevant and your reply rate climbs for reasons that have nothing to do with subject-line tricks. You write the email. We just make sure it lands where it matters.