16 Best Email Guessing Tools: These Guessers Predict Addresses

When you have little information to go off, it can be challenging to find—or predict—someone's email address. Luckily, many businesses use similar email formatting, allowing professional email addresses to be predicted.

Email guessing tools output a list of possible variations of getting in touch with an individual.

To help you find the right email guesser tool, we’ll cover the following:

  • What is an email guessing tool?
  • Common features of an email guesser
  • Three best email guessing tools
  • Three best email finders with email guessers built-in
  • Five free email finder tools for generating leads
  • Five sales management tools that help you find new prospects

Let’s cover what an email guesser is, what they do, why you could benefit from one, and how it’s different from other email finder tools.

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What is an Email Guessing Tool?

An email guessing tool—or email guesser—will determine potential email variations for a contact. Input a first name, last name, and domain into the email guesser tool, and it will output all potential email variations based on common email patterns used by that—and other—companies.

An email guessing tool has a few different terms, including email guesser, email syntax checker, and email format checker. These tools serve the main function of predicting potential email address variations, allowing you to connect with prospects when you can’t authenticate their email address.

But there are several other email finding tools out there! To help you differentiate between them, we explain what each type of email finder tool is below:

  • Email finder: Find and collect valid email addresses when you input a professional’s name, job title, company, domain, and other identifying information.
  • Email extractor: Find and extract email addresses from website domains using an automated tool, saving these manual efforts.
  • Email checker: Verify and validate email addresses to check the authenticity of emails, increasing your email delivery and response rate.

Common Features of an Email Guesser

The main feature of an email guessing tool is email guessing and prediction; the user inputs a first name, last name, and domain, and the tool predicts potential email address variations. These tools commonly have a number of additional features that enhance their ability to predict email addresses accurately.

Below are some of the main features email guessing tools have:

  • Email guesser: Guesses potential professional and business email variations when given a first name, last name, and domain.
  • Domain email pattern lookup: Guesses potential email patterns that a company will use and determines the most likely variation.
  • Misspelled domain detection: Detects potentially misspelled email addresses and suggests modifications to clean up your lead lists.
  • Syntax validation: Automatically detects and corrects syntax errors found in email addresses, ensuring your emails are delivered properly.
  • Domain validation: Identify email addresses with inactive or invalid domains known for spam and abuse.

It’s important to note that many comprehensive email finder tools that have an email verifier do not have an email guessing tool. In most cases, any tool with an email verification tool does not use an email guesser, as it would be unnecessary if emails were validated when being collected.

See our comparison of the best email checker tools if you want verified email addresses.

3 Best Email Guessing Tools

Email guessers predict potential email patterns based on what a company or domain is currently using or on standard email formats businesses use. The following are some of the best email guessing tools to help you predict the email addresses of contacts you wish to connect with.

While the tools below are exclusively email guessing tools, some more comprehensive email finder tools also feature email guessing capabilities.

1. Email Address Guesser

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Cost: Free

Availability: Web browser

The best thing about it: Easily find Gmail and iCloud email address formats

A browser tool that lets you input a first name and last name and choose between Gmail or iCloud, and it will output potential email variations for that contact. Extremely easy to access and free to use.

2. Ads for Carts Email Guesser Tool

3 Best Email Guessing Tools - Ads for Carts

Cost: Free

Availability: Web browser

The best thing about it: Free to use a browser tool that lets you get potential email variations in seconds

This browser tool makes it extremely easy to guess prospect email addresses. Simply input a person's first name, last name, and company domain. The tool will output potential variations you can copy and use as part of your outreach.

3. GitHub Cheetar Email Guesser

3 Best Email Guessing Tools - GitHub Cheetar

Cost: Free

Availability: Software

The best thing about it: Python-tool that generates and checks potential email address variations

A Python-based tool will generate and validate email addresses according to data input to the system, such as a name, birth year, and domain. The tool will then predict a number of potential variations.

3 Best Email Finders with Email Guessers Built-In

You should use an email finder tool if you want more extensive capabilities. If an email guesser is still essential to you, a few email finder tools offer email guessing functionality. Make sure also to check out our constantly updated list of email finder tools.

1. Name2Email

Cost: Free

Availability: Browser extension

The best thing about it: Find email addresses directly within Gmail for extreme convenience

Name2Email lets you find a valid email address by searching a name and domain—all within Gmail. Enter the name and domain of the person you are looking for, and Name2Email will provide several possible emails to contact that person. Choose the right method of contacting them for the best results!

2. Email Matcher

3 Best Email Finders with Email Guessers Built-In - Email Matcher

Cost: Free

Availability: Browser extension

The best thing about it: Search a name and domain to quickly get an email address

AmpleMarket's EmailMatcher tool is a Google Chrome extension that helps you find email addresses by inputting an individual's first and last name and a domain. Email Matcher will then find relevant contact details and provide an email address that allows you to reach out to contacts important to your business.

3. LeadGibbon

3 Best Email Finders with Email Guessers Built-In - LeadGibbon

Cost: $39/mo (1,000 credits) to $299/mo (30,000 credits)

Freemium Offer: Free trial upon sign-up

Availability: Web browser

The best thing about it: Find and validate email addresses of targeted prospects

Create a lead database that your sales team can leverage. With just one click, find email addresses from LinkedIn, and then enrich these emails with more contact details to help you market more directly and effectively.

In addition to these tools, another innovative solution for enhancing your email outreach is the AI Email Writer by Close. This tool leverages artificial intelligence to help you craft effective and personalized sales emails quickly

5 Free Email Finder Tools for Generating Leads

If you want more than an email guesser, consider an email finder tool that offers greater functionality. Below are several free email finder tools—or tools that offer a free plan option—that will help you generate leads at no cost.

1. Hunter.io

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Cost: $0/mo (25 monthly searches) to $499/mo (50,000 monthly searches)

Freemium Offer: 50 searches/mo + 50 verifications/mo

Availability: Web app, Browser extension

The best thing about it: Find emails in seconds and connect with decision-makers who matter

2. GetEmail

5 Free Email Finder Tools for Generating Leads - GetEmail

Cost: $0/mo (10 credits) to $399/mo (10,000 credits)

Freemium Offer: 10 credits/mo

Availability: Web app

The best thing about it: Find anyone's email within seconds

3. GetProspect

5 Free Email Finder Tools for Generating Leads - GetProspect

Cost: $0/mo (50 emails) to $99/mo (5,000 emails)

Freemium Offer: 50 emails/mo

Availability: Web app

The best thing about it: Search leads based on specific criteria, and generate and track prospects

4. LeadMine

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Cost: $0/mo (10 credits) to $149/mo (1,000 credits)

Freemium Offer: 10 credits/mo

Availability: Web app, Browser extension

The best thing about it: Find, capture, and export B2B contact information

5. Lusha

5 Free Email Finder Tools for Generating Leads - Lusha

Cost: $0/mo (50 email credits, 5 phone credits) to $79/mo (unlimited email credits) | Custom pricing (Enterprise)

Freemium Offer: 50 email credits/mo

Availability: Web app, Browser extension

The best thing about it: Find email addresses and phone numbers for prospective leads

5 Sales Management Tools that Help You Find New Prospects

Several other email finder tools will help you find valuable leads and integrate them into your sales funnel. These sales management tools find (and sometimes verify) email addresses so that an email guessing tool is unnecessary.

1. SellHack

5 Sales Management Tools that Help You Find New Prospects - SellHack

Cost: $5/mo (100 credits) to $49/mo (1,000 credits)

Availability: Web app, Browser extension

The best thing about it: Verified email addresses are ensured with a 100% bounce protection guarantee

2. FindEmails

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Cost: $29/mo (1,000 credits) to $99/mo (10,000 credits)

Availability: Web app, Browser extension

The best thing about it: Connect with company decision-makers instantly

3. Skrapp

5 Sales Management Tools that Help You Find New Prospects - Skrapp

Cost: $0/mo (100 emails) to $299/mo (50,000 emails)

Freemium Offer: 100 emails/mo

Availability: Web app, Browser extension

The best thing about it: Specialized B2B lead finders and outreach

4. AeroLeads

5 Sales Management Tools that Help You Find New Prospects - AeroLeads

Cost: $49/mo (2,000 credits) to $299/mo (20,000 credits) | Custom pricing (Enterprise)

Availability: Browser extension

The best thing about it: Connect with decision-makers for high-impact results

5. UpLead

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Cost: $0/mo (5 credits) to $199/mo (400 credits)

Freemium Offer: 5 credits upon sign-up

Availability: Web app, Browser extension

The best thing about it: Find the best leads for your industry by searching social networks and enriching contact details

An email guesser will automate the process of trying all potential email variations, allowing you to attempt to connect to leads that you cannot verify. This saves your team the time to test all variations themselves, using standard business patterns to quickly generate potential variations.

The main flaw with this method is that only one of the variations will be accurate; by nature, this method has a low delivery rate. To more effectively target leads, you can use an email finder tool that finds authentic email addresses and other contact details.

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Once you've found that email address, you'll need a compelling message to send. Use our free cold email templates and strategies to get more hot leads into your sales pipeline.

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