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The newest outreach data insights backed by millions of successful lemlist campaigns directly in your pocket.

What is lemlab?

lemlab is the ultimate resource for data insights powered by lemlist data.
We analyzed millions of successful cold outreach campaigns and cold emails sent by lemlist users to give you data-driven and concrete results.
We found out what works so you can actually get customers and win more deals. Starting now.
25181M+
cold emails
251M+
outreach campaigns
2525K+
active users
1111K+
paying teams
How many cold email follow-ups should you send?  The data says 4-9
An analysis of the optimal number of cold email follow-ups that you should be sending to your prospects. Plus examples and templates...
lemlist team  | Jun 7, 2024
How to start an email: 25 high-conversion greetings & intro lines
Check out these 25 high-conversion email opening lines that will help you get more replies and book more meetings. Plus a data...
lemlist team  | Jun 8, 2024
B2B Cold Email Subject Lines that convert (data+examples)
The 6 elements of subject lines that convert, based on analysis of millions of cold outreach campaigns. Plus 10 proven successful B2B
lemlist team  | Jun 9, 2024

Proven sales insights
backed by lemlist data

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What 182 Million Cold Emails Taught Us: Key Insights You Need to Know
We analyzed all the data from almost 182 million cold emails sent by lemlist users, and we determined what actually works in your outreach.
Liucija Adomaite
July 5, 2024

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What’s the Best Time to Send Cold Emails?

You should be sending cold emails on Monday mornings - find out why, according to our analysis of millions of cold emails.
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Nov 26, 2024
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How many cold email follow-ups should you send to increase your replies?

An analysis of the optimal number of cold email follow-ups that you should be sending to your prospects. Plus examples and templates you can use.
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Nov 26, 2024
Cold Emailing
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7 ways to level up your cold email copywriting using data

With our proven techniques your cold email copywriting will be unmatched. Increase your response rates and achieve your sales goals faster.
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Nov 26, 2024
Cold Emailing
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Emojis in cold emails: Data-Backed reasons to use or avoid them

Emojis in cold emails can be an engagement booster - or they can get you moved to the trash. Find out how to use them, based on data.
lemlist team
Nov 26, 2024
Cold Emailing
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Should you use images in cold email? Yes, and here’s why

Boost your cold email conversions with images. Discover the data-driven reasons why adding visuals can increase click-through rates and drive sales.
lemlist team
Nov 26, 2024
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