We often tend to worry about what to write in the email as we start our email marketing campaign or drop a cold proposal to a client. This is exactly where things go wrong. The truth is, someone is only going to open the email if firstly the subject line makes sense to them.
An average user gets up to 40 or 50 junk emails a day, and if you want to be the one who doesn’t end up in spam, you have to do things a bit differently. Before you focus on the body of your email, it is the subject line that needs to be taken care of.
I know you will now tell me that you have an AI tool for all this, and the subject line is not the problem. But is it actually so? Read along as we discuss why most email subject line generators fail and what you can do about it.
Is there actually a hack that makes people open their emails, or is there an email god we need to appease for their blessings? Or, is it just simple marketing and a trusted tool that does all the work? Let us find out!👀
Your AI Subject Lines Sound Fine… So, Why Is No One Opening Them?
At this point, you must be wondering, this can’t be about me since my subject line reads fine. Well, I am sure your subject line reads great simply because we put in a lot of effort to craft our emails. But the challenge lies not with your capability or writing but with the growing competition.
Demandsage reports that “on average, a person receives approximately 121 emails daily.” This means your email is fighting, struggling, and aiming to capture a stranger’s attention, that too with 120 other people. So, the competition is not only intense but also a bit unfair.
But this doesn’t really mean nobody is opening any unknown emails. Think about it this way: if you are on the lookout for a comfortable office chair, you will surely open every junk mail that sells one. In short, the secret to a breakthrough here is very simple:
- Your subject line needs to be relevant not only to the product but also to the problem it is trying to solve.
- The 100% free product trope doesn’t work anymore. In fact, most users get scared thinking it is a phishing attack and end up reporting the same.
- No one likes to read the generic AI templates anymore. The moment you add words like “ revolutionary, innovative, groundbreaking,” the user responds with Mark as Spam, Delete Forever, and goodbye.
- Most importantly, everyone knows that a cold email is you trying to sell a product. Therefore, instead of being desperate, you need to be subtle, confident, and most importantly, highlight what the user is missing out on.
In other words, you cannot have a subject line that is obvious, boring, or uses the same old tricks, no matter how refined the language is. It doesn’t really work that way.
What Actually Gets an Email Opened (Not What Tools Tell You)
If you have recently invested or subscribed to a premium plan for an email subject line generator, this section might hurt a little financially. But don’t worry, we promise to remedy this later. 😅 Anyway, now back to the discussion.
Let us ignore what tool you rely on for a moment and think about it from a user perspective. Imagine that you are looking for a high-end office chair and you get an email that says “Limited Time Offer, High End Comfortable Chair On Discount” or “ A Smart Investment for Workplace Comfort”, will you immediately open it? The answer is no, obviously you won’t. You might not delete it immediately, and well, that’s it.
All your hard work, effort, and anticipation get reduced to an email that is not deleted for the time being. But here is the good news: you can easily turn this around. All you need is a bit of smart work and research. These two supposed subject lines have quite a few things in common, like:
- They play it safe and try to simply give out information instead of making an impression.
- It pretends to understand the issue a user can have with an uncomfortable chair, but then generalizes the execution.
- At this point, being relatable and honest are the only two marketing allies that a brand needs to care about. However, these generic statements tend to miss out on both.
- To be honest, a user will always run to open an email that they feel like is personally written for them. You know, like some kind of sign from the universe. And, no, it is not a whimsical observation. But a proven fact.
Or, to put it in simple terms, a subject line needs to deliver three basic things:
Curiosity
Not many people acknowledge this, but this is exactly where you form an instant connection with your readers. It’s that one question or trope that makes them interested in your email. For example:
❌Instead of you writing “High End Comfortable Chair On Discount.”
✅ You start with a question: “ Does your back hurt while working? Or is the neck pain getting worse? etc.
Upfront Promise
I think you may have heard or read a thousand times that a marketing speech needs to be dreamy and create a dramatic effect. To be honest, it is actually a great idea, but not when it comes to your subject lines. Here, you need to be direct and straightforward and tell your users exactly what they need to hear. Before they hit the “delete” button and move on.
Emotion
This is where most subject lines fail, and in turn, most AI tools as well. A user doesn’t buy a product because the subject line is in nuanced english. They open the email or buy the product because they realize they are missing out on something great.
Therefore, a sprinkle of “groundbreaking purchase” will not really do much as compared to "Are you missing out on a comfortable work-from-home setup?” Moreover, it is not an assumption but a standard practice, as a report published by Hubspot highlights: it says that “36% of marketers say that they personalize the subject line or preview text the most.”
The Biggest Problem with AI Subject Line Generators
To be honest, relying on AI for a subject line is a brilliant idea. Since it saves you the hassle of all the brainstorming and stress, it allows you the time to actually write your emails. However, this entire fantasy crumbles the moment the popular AI subject line generators rely on generic templates.
Since they are trained on a very stringent dataset, they keep on doing the same thing for every subject line. Be it the one for your cold outreach, a quick email to your boss, or a client.
But more than anything else, the regular AI-generated email subject writing tools in the market often lose the plot with over-optimization. They operate on the philosophy that the more perfect the English, the better the open rate. But unfortunately, this ship had sailed way back, and the tools failed to realize that the real success is in understanding the user intent.
And for you, it means relying on a tool that lets you add your personal insights, express your thoughts with no restrictions, understand the target audience, and then generate the subject lines accordingly.
What Makes HumanizeAI.io’s AI Email Subject Line Generator Special?
You can say that it is one of the few tools in the market that offers unlimited usage, that too for free! Or, an easy-to-use interface with no added downloads, but it is way more than that.
Step 1
To begin with, you don't need to write highly descriptive, precise, and mind-bending prompts to get the perfect results! All you have to do is simply explain the content of your email, and you are all set. The best part it can be in any tone, any mood whatsoever. Moreover, you can add up to 500 words each time you generate the subject lines.
Step 2
In a setup like this, you are the one who is in control. And no, I am not talking about you setting the mood for the email or adjusting the tone here and there. But a full creative level access as you generate the perfect subject lines for you.
- It lets you set the tone of your subject lines.
- The AI tool understands users’ intent, the purpose of writing emails, and lets you set your emails as per various situations, like promotional, informational, announcement, etc.
- With HumanizeAI.io’s AI Email Subject Line Generator, you even get to set the capitalization you want and toggle your preferred choice accordingly.
- The email to your client doesn’t need to be personalized or have an emoji. Our AI understands that, and that is why our setup lets you decide all these on your own with a toggle.
Step 3
You get to select the number of subject lines you want, if you wish to copy it directly or download a dedicated file, all in one setup. Needless to say, our tool is built keeping two things in mind: one is most definitely easy user access, followed by a list of things the popular AI tools have a tendency to miss.
Now, it is not that all of these dedicated modifications are just for show, and the results are still the same as always. Here is a list of subject lines our free AI Email Subject Line Generator generated based on the example we were working with:

Conclusion: If It Sounds Familiar, It’s Already Ignored
As we wrap this discussion, there is one important thing that we need to talk about. The problem was never about AI, but it is our inability to decide and settle for the right tool. If things are done right, an ideal tool will help you with various personalization options to keep up with your style accordingly.
That is why a tool like HumanizeAI.io’s AI Email Subject Line Generator ensures it relies on the custom inputs provided by you. This way it not only moves past generic templates but also avoids sounding the same old and clichéd.
Now, I don’t know if you remember this or not, but I had said I would try to fix it if you were financially hurting after your investment in an AI generator. Well, our AI Email Subject Line Generator is completely free to use and offers unlimited attempts! 😆
So, the next time you set out to write an email to your client or launch a new product, remember one simple thing: it is not about being grammatically correct, polished, or "optimized." But it is about reflecting your emotions in one simple line, which will make people feel seen and eventually drawn towards opening that email!
