Let’s Get Testy: What You Need to Know About Subject Line Testing

Email subject lines are the first thing people see when your email lands in their inbox, and it's often the deciding factor of whether or not they open it.

With so much riding on just a few short words, how can you make sure your emails stand out from the crowd? It's simple: use a subject line tester! That said, there are many options out there–so which one should you use? Read on for our ultimate guide to finding the best subject line tester.

What Is a Subject Line Tester?

Subject line testers are tools that allow you to A/B test different versions of your email subject lines. With A/B testing, you can compare two different versions of an email and see which one performs better with your audience. This helps you identify which words, phrases, or ideas resonate best with them and allows you to create more effective emails in the future. It's like having extra eyes on your emails before they go out!

Best Subject Line Tester (Top Pick)

When choosing an email subject line tester, there are several factors you should consider. First and foremost, look for one with a proven track record of success. Also, choose one with personalization and A/B testing capabilities to customize each message according to individual needs and optimize their performance accordingly.

We have researched various email subject line testers that ranked highly with users due to their ease of use and reliability when delivering results.

The top pick (drum roll, please!) goes to Refine by Moosend.

Refine by Moosend

Moosend announced its newest artificial intelligence (AI) endeavor last December with the release of Refine. Refine is a free optimization tool that will analyze your subject lines and provide suggestions to improve your email marketing open rates.

Moosend is excellent because you can choose your industry and test how your subject line would work with a certain number of subscribers. Once you enter your subject line, their analytics show you how well the subject line would have performed in that industry, and they provide suggestions to improve and optimize your subject lines.

Email Subject Line Tester (Best Options)

One of the best ways to test different subject lines is to use an email subject line tester. Subject line testing tools provide helpful information regarding the efficiency of subject lines to help businesses increase their email open rates. Below we compiled a list of the most reliable and effective email subject line tester free and paid tools (in no particular order), so you can choose the best option to fit your needs or your business!

Test Subject by Zurb

The developers at Zurb noticed how sender information and email subject lines are shortened when delivered to your mobile phone, often creating hilarious but cringe-worthy lines to read. They came up with a solution: Test Subject. Users test the performance by adding the sender's name, subject line, and preview text into the fields, showing how the email will look on various popular mobile devices.

This is great if you're looking for a product that gives insight into client-facing email campaigns! It's also free to use.

Spam Check by Postmark

All that hard work you put into your email campaign, only to be flagged as spam, is challenging! If there were a subject line tester tool specifically for spam, Spam Check might be it. Don't let the name fool you; Spam Check is a subject line tester that analyzes everything from the body of the email to your subject line and gives you exact details on what will trigger spam filters. It's free to use and helps users understand how to draft their email content from start to finish without triggering spam filters.

Omnisend

If you're looking for a free subject line tester that checks length, wording, and scannability, look no further! Omnisend is one of the best email subject line testers, providing users insight to achieve better email performance.

First, you'll enter your potential email subject line. Then Omnisend will offer you an overall score, character count, and wording insights. It's easy to use and provides effective results. Its scannability feature helps you get past spam filters, which is critical to maintaining a healthy domain and deliverability with email service providers.

Email Spam Tester

Unlike the other subject line tester tools, Email Spam Tester is comprehensive and has a few paid package offerings. This option is great for businesses with teams that do a lot of cold emailing. Email Spam Tester analyzes and grades all elements of your content draft and gives suggestions and guidance on improving. Packages start at $45 per month.

Send Check It

If you're looking for an email subject line tester that thoroughly reviews your subject line, Send Check It takes the win. For those who love analytics, Send Check It gives an overall score assessment of your subject line, then analyzes your subject line against 16 criteria that subject lines are measured against, showing you where your subject line ranks against those criteria. The list of criteria covers spam words, emojis, and sentiment. The tool is free, but you can use your name and email address for more insights or tips.

Spam Subject Line Tester (Key Differentiators)

It's also essential to remember spam filters when crafting your subject lines. Most modern email programs have built-in spam filters that detect potentially malicious content before it reaches recipients' inboxes; these filters check for certain words and phrases that spammers commonly use to protect users from unwanted messages. To ensure the maximum deliverability of your emails, use a spam subject line tester tool to check whether the words in your news will trigger any of these filters before sending them to the world.

Key differentiators exist between a subject line that will resonate with your audience and one that will be flagged as spam. Here are some things to avoid when crafting your email subject line:

• Poor grammar and spelling (spell check, spell check, spell check!)

• All capital letters in your subject line.

• Lots of exclamation points in your subject line!!!

• The subject line mentions anything about money.

Utilizing one of the email subject line testers listed above will help you craft the best subject line for your email campaigns to ensure you're not being flagged as spam. Also, refrain from using phrases and words that will be spam triggers.

Subject Line Tester Tool (Getting Started)

Ready to find the best subject line tester for your needs?

Crafting an effective email campaign starts with finding just the right words for your subject lines—and this comprehensive guide will help get you there! Whether you want free options or paid solutions, this guide has plenty of ideas on targeting different audiences so that each message is perfectly tailored according to individual needs and preferences while avoiding any potential pitfalls of spam filters!

As we've seen, many different types of subject line testers are available, so you'll have to figure out which features will help your business meet its goals. Remember to use your email newsletter platform for A/B testing on your subject lines!

beehiiv offers a suite of products to help you create engaging emails that won't trigger spam, and offers A/B testing and other tools to help grow your audience! Try beehiiv today!