You spend 30 minutes writing the perfect email body. The prospect never opens it.

Why? The first line was dead on arrival. Your name, subject, and opening words are the only things a recipient sees before deciding whether to click or scroll past. And most professional emails fail right there, in the inbox preview.

I’ve watched this play out across millions of outreach campaigns we’ve sent through lemlist. We’ve measured the exact word counts, opener categories, and phrasing patterns that separate emails people actually read from the ones that rot in the inbox. In this post, I’ll show you the data behind what works, walk you through 25 real greetings and openers with measured results, and give you the templates to start using them today.

Whether you’re emailing a prospect, a colleague, your manager, or someone you’ve never met, the principles are the same. But I’ll be honest: our deepest data comes from cold outreach, and that’s where we’ll spend most of our time.

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Before you dive into the best opening lines, take advantage of our free cold email generator below.

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The subject and first line of your email are what determine if the recipient actually opens it and reads what you have to say. That’s because this is the only content they can see as soon as they check their inbox.

So if you haven’t optimized these details, there’s less of a chance that your email actually gets read.

Think about the typical inbox layout. Generally it will look like this:

Your prospect’s decision to open your email depends on your name, subject, and the first few words of your email.

That preview snippet appears alongside your subject line in the inbox, giving recipients a glimpse into the content of your email and enticing them to open it. (Email Preview Text: Length, Character Limits, and Examples (Updated 2026) | Knak) According to Litmus’s guide on preview text, email preview text adds more context to your subject line, which can boost your open rates. (The Ultimate Guide to Email Preview Text | Litmus) And as Knak’s 2026 analysis notes, narrow screens and reader-controlled settings mean you cannot count on anything beyond the opening words. (Email Preview Text: Length, Character Limits, and Examples (Updated 2026) | Knak)

So the goal is to make your email stand out, and to make prospects want to open your email without thinking that they’re just one more person on your list.

For example, take a look at this email introduction:

It’s descriptive, but a bit boring. It focuses on the sender, without paying any attention to the recipient.

Now, check out this optimized version:

It’s got a sharper subject line, and the greeting gets right to the point. The opening line focuses on the prospect (lemlist) and shows that the sender is focused on them.

In fact, this email got a 90% open rate. The opening line and subject made people want to know what was inside.

Not only that, but once your subject line and greeting inspire prospects to open the email, its opening line is a key factor in whether they read the rest of your message, and ultimately take the action you’d like them to take.

Now, what does the data say about the best way to start an email?

According to our latest analysis of millions of cold outreach campaigns, the best way to start an email is with a 4–12 word opening line that gives value to the prospect. That means: start your emails with a concise opener that focuses on the person you’re emailing (not on you!).

Let’s take a closer look at that data.

To test the best email opening lines, we examined the first full sentence of millions of emails sent through lemlist, excluding the greeting (e.g. after phrases like “hello {{firstName}}”).

First, we wanted to get an idea of how long the start of your email should be: should it be short, to grab attention, or long enough to give more context?

According to the data, the highest-conversion opening lines were between 4–6 words. Opening lines with 7–12 words also performed well, so we recommend that you aim for a sweet spot between 4–12 words.

Here’s the full breakdown:

Now that you know how long your opening line should be, what is the best way to actually write it?

To test that, we grouped opening lines into different categories, based on whether they contained certain words or phrases.

The categories are:

We generated an AI-powered database of hundreds of words and phrases that fell into each type of opener, and then used that to categorize millions of real cold email opening lines that lemlist users have sent.

Once we had thousands of email openers in each category, we found the average reply rate of each type of opening line.

Here is how each type of opening line performed:

The opening lines that got the most replies were those that provided value to the prospect: offering feedback, giving a free service or advice, providing expert insight, etc.

Other methods like classic introductions or commenting on the prospect’s recent activity can also pique a prospect’s interest.

Small talk was the least successful category, so if you want to start an email with casual chit-chat, you’ll need to make sure that it’s well-targeted to your prospects.

The “giving value” category wins because it shifts the frame immediately. Instead of asking the prospect to invest attention in who you are, you hand them something useful before they owe you anything. That’s the email equivalent of leading with the handshake, not the business card.

The surprise for most people is how poorly small talk performs. It feels safe, but safety is the problem: it signals “I have nothing specific to say to you.” If you’re going to use a pleasantry, pair it with a genuinely personalized second line. Generic warmth alone doesn’t cut it.

Of course, there are many other factors in a cold email campaign that contribute to the reply rates. You’ll want to optimize not only the start of your email but also its subject line, call-to-action, signature, and your cold email copywriting as a whole.

Now that you know the data behind email opening lines, here are some examples of the best way to start an email.

Before we get into cold outreach templates, a quick word on internal and warm-context emails. Different relationship calls for a different opener.

Emailing your manager or boss: Skip the preamble and state the purpose in the first line. “Quick update on the Q3 pipeline review” or “Flagging a blocker on the Acme deal” tells your manager exactly what they’re opening and why it matters to them. Don’t bury the ask.

Emailing a colleague you work with regularly: Keep it brief and direct. “Following up on what we discussed in standup” or “Here’s the doc you asked for” works. You’ve already built the relationship, so your opener just needs to orient them.

Emailing a professor or someone with a formal title: Use their title and last name in the greeting (“Dear Professor Torres,”) unless they’ve told you otherwise. Open with the reason you’re writing: “I’m reaching out about…” or “I have a question regarding your research on…” Clarity beats formality every time, but the title signals respect.

Emailing a group: Acknowledge the group early (“Hi team,” or “Hi everyone,”) and put the single most important point in the first line. Groups scan harder than individuals. If you bury the point, half the recipients will never find it.

These are good defaults. But the rest of this article focuses on where the stakes (and the data) are highest: opening emails to people who don’t know you yet.

First, we’ll start with the greetings.

Keep in mind that with an email greeting, you should:

✅ Align your email greeting to your prospects’ tone of voice

✅ Personalize your greeting with the prospects’ name

✅ Match your greeting with your email’s context

For the full guide on picking the perfect cold email greeting, use this list of 20+ email greeting examples.

You can’t go wrong with a classic: simply say hello!

This is a great greeting for when you’re reaching out for the first time to this person, and you aren’t sure about what tone to take.

If you’d like to err on the side of caution, pick “hello” over “hey” or “hi” so you don’t come off as too casual.

Just make sure that you include their first name, and double-check that you’ve spelled it correctly.

A longer greeting that incorporates a bit of small talk, this allows you to open the email politely, and then get straight to the point.

If you use a greeting like this, we recommend you follow up with an opening line that immediately delivers value to the prospect. Don’t follow it up with chit-chat openers like “I hope this finds you well.”

You’ve already broken the ice in your greeting, so use the first line to deliver your message! You’ll see examples of to-the-point opening lines further down in this list.

If you’d like to deliver your message as directly as possible, start your email with this greeting.

You can add a personal touch by using your prospect’s first name, so it doesn’t come off as too blunt or impersonal.

At the same time, there’s no fluff: your prospect sees immediately why you’re contacting them.

Depending on the length of the subject line, they’ll be able to read why you’re reaching out to them in the preview in their inbox. That makes your email stand out, and it saves the recipient time, which makes them more likely to respond.

This greeting is a to-the-point example for when you’re following up after having already spoken with your prospect.

It’s direct and references a conversation you’ve already shared. It immediately communicates the value of this email: a deliverable that the prospect has been waiting for.

Another follow-up greeting, this one is appropriate if you haven’t already agreed to send something after the meeting.

It keeps the conversation going and encourages your prospect to reply by reminding them that you’ve already met in person.

We recommend you include a recap of what you and the prospect spoke about, then give them clear and simple next steps to move them down the funnel.

If you have already met this person and they have agreed to follow up with you, this is a good greeting to use to check in on their progress.

You keep it polite with the “please” but show right away what your expectations are with the message: to be kept up to date on what the two of you have already discussed.

If you want it to sound less severe, you can add a “hi” or “hello” before {{firstName}}.

Here is a greeting for prospects who have attended a talk, webinar, or other event that you’ve hosted.

It’s a good idea to send emails with this kind of greeting to everybody who came to your event, to keep them engaged.

This communicates your appreciation (“great to have you”) and makes it feel personal by using their first name.

Use the rest of the email to provide them with additional helpful info that relates to the event they attended, or to make a pitch that connects to the same topic.

A classic follow-up greeting, this is a good one to use for slightly more formal prospects who haven’t responded to the first email.

If you’re unsure of the best tone of voice to use with this person, this greeting is nice and neutral.

By the way, there is nothing wrong with sending a follow-up if the recipient doesn’t immediately reply. In fact, it increases your chances they’ll get back to you.

Here’s a greeting to use for prospects that have replied, to give them some appreciation for having taken the time to get back to you.

Especially if your first email was a cold email, meaning the recipient had no other connection with you, this kind of greeting is great for moving the conversation along and building a relationship.

One last follow-up greeting.

This one helps the prospect feel appreciated and interested in continuing the conversation. It sounds a bit like you’re responding to an old friend and opens up the exchange for a casual dialogue.

Now that you’ve got 10 email greetings to choose from, let’s move on to 15 opening lines that will hook prospects and inspire them to act.

As we mentioned in the data above, small-talk opening lines like this are among the least successful types of openers.

However, this example is a classic, meaning more formal prospects will likely prefer it.

If you target this kind of opening line to the right prospect and tailor the rest of your email to clearly communicate the benefit you can offer, it can still convert.

Here’s an example of a successful email with this opening line:

Subject: Dear {{firstName}}, shipping offer for you!

I hope you had a lovely week so far – By way of introduction, my name is Anna and I work at Convelio, the fine art shipping compnay.

I hope you don’t mind me reaching out, as I visited your website earlier today, I thought that there might be some nice synergies between {{companyName}} and Convelio.

To give you some background information, Convelio is currently helping 2000+ dealers to save up to 40% of time and costs when shipping internationally. We are able to offer competitive, instant quotes and to ship from and to every location around the world.

In fact, Anna’s gallery-specific email template got an 88% open rate with this intro line. Similar template can be found here.

The data shows that opening lines that immediately deliver value get the highest reply rates. An opening line like this one does just that, with an offer that’s tough to decline.

Here’s an example of an email with this opening line. Notice how Romain connects the opener with a concrete pain point that is relevant to the prospect.

Hello {{firstName}},

How about if I try to bring you customers over the next seven days, completely free?

My name is Romain Carpentier, and as I have built prospecting data software, I seek to demonstrate its value by bringing initial contacts to certain consultants. Your site highlights impressive references (FreelanceRepublik, EDT ENGIE…), and that’s why I thought of you!

Having a lot of contacts who could be interested in your PPC services (in particular), the idea is to bring you first contacts by email.

Then it’s up to you to continue the conversation and close them if there is a “match”.

Would you be interested in doing this?

This prospecting cold email got an 84% open rate.

Another opening line that immediately delivers value, this option requires you to do a bit of research.

You’ll need to follow the opener with real, concrete feedback on the company. It should tie into the offer you have for them and position you as an expert on the subject.

Plus, if you’ve been following this person on social media and have seen them share a specific pain point, you can make this even more personalized by offering them feedback on that specific issue.

Here’s an example of a successful email that used this opening line:

Subject: Feedback about {{CompanyName}}

Decided to send you and your teammate {{Teammate}} my feedback on {{companyName}}.

Our data makes this pretty clear, but it’s worth spelling out. Some openers actively hurt your chances. Here are the patterns to watch for:

The common thread? All of these openers center you instead of the prospect. Flip the frame. Start with what matters to them.

Lead with value or relevance. Reference something specific about them (a recent post, a company milestone, a shared connection) or offer something useful in the first line. Our data shows that “giving value” openers outperform every other category for reply rates. Avoid generic intros like “My name is…” until you’ve given them a reason to keep reading.

Aim for 4–12 words. In our analysis of millions of cold emails, opening lines in this range consistently got the highest reply rates. Shorter openers can work if they’re punchy, but anything over 12 words starts to lose the reader before they’ve finished the sentence.

It’s the most common opener, but it’s also one of the weakest. In our dataset, small-talk openers like this ranked last for reply rates. If you want to be polite, put the pleasantry in the greeting (“I hope you’re having a great week, {{firstName}},”) and use the opening line to deliver your actual message.

It depends on the context. “Dear [Name]” works for formal situations (academia, legal, government). “Hi [Name]” or “Hello [Name]” is the safer default for business emails, cold outreach, and any context where you want to sound approachable without being too casual. When in doubt, match the tone your recipient uses in their own communications.

The start of your email is the smallest piece of copy with the biggest impact on whether anyone reads the rest. A 4–12 word opener that leads with value, references the prospect, or demonstrates real research will outperform a generic pleasantry every time.

We’ve given you the data, the templates, and 25 real examples with measured results. Now it’s about execution.

If you want to put these openers to work at scale (with AI-generated opening lines, automated multichannel sequences, and intent-driven timing), start a 14-day free trial of lemlist.