12 Subject Line Tester Tools Your Marketing Team Can Use
Do your subject lines draw readers in and drive them to open your emails?
If not, you need to make use of an email subject line tester before hitting send.
But what’s an email subject line tester?
It’s a tool that analyzes email subject lines and tells you what you need to do to improve them. It checks for factors such as length, emotion, grammar, punctuation, personalization, etc.
Why should you care about subject lines?
Consider how many emails your recipients receive in a day from different sources. Then, factor in research reporting that the total number of emails sent and received will exceed 333 billion in 2022.
This begs the question:
Why should the recipient choose to open your email over others?
It’s for this reason you need a subject line tester.
You need a tool that can increase your chances of getting higher open and click-through rates for your emails. A tool that recommends what words you need to change or include to improve deliverability and readability.
But which are the best subject line tester tools?
Find out below.
Choose the Best Subject Line Tester for Higher Open Rates
Subject lines are the first thing your recipient sees in their email inbox.
These are often the deciding factor on whether the recipient opens your email or not. Therefore, it’s crucial to stop relying on intuition and leverage tools that offer cold hard data on creating subject lines that work.
And in this section, we list out the best subject line tester tools your business can use to improve your email open rates.
Check these out.
1. The Email Subject Line Analyzer by Attrock
We kickstart with our very own Email Subject Line Analyzer.
We are a digital marketing company, and since email marketing is part of the services we offer when helping brands drive great returns, we created a tool to make it possible.
But what makes our email subject line tester stand out?
The Email Subject Line Analyzer by Attrock assesses and scores your subject lines based on whether they can drive more clicks. This way, it becomes easy for you to write compelling and emotional subject lines that get more clicks and opens.
Additionally, you get suggestions on how to improve your subject line, including the ideal number of words, personalization, character count, etc. You can also access a word bank with words you can consider adding to your subject line.
But that’s not all.
You also get a preview of how your email will look in your recipient’s inbox and what it lacks.
Key Features
- Feedback on the expected subject line performance
- Suggestions on improving the subject line to get higher open rates
- Preview of the subject line on different devices
- Word bank with suggestions on phrases you can add to your subject line
- Recommendations on best practices for personalizing a subject line
Pros
- More detailed analysis than most other tools
Cons
- Does not provide industry-specific analysis
Usability
- Easy to use
Tool Level
- Beginner/Intermediate/Expert
Pricing
- Free
2. TestSubject
This subject line tester ensures that your subject lines display properly in the recipients inboxes without cutting off words.
Since most people open emails based on subject lines, you need to ensure you write subject lines that increase click-through and open rates so that you can increase conversions.
Key Features
- Tests how subject lines will appear on various devices
- Reviews text on the preheader
- Shows how your sender name appears on mobile devices
Pro
- Extremely good for seeing previews of subject lines of various devices
Cons
- Does not show suggestions for improving email subject lines to increase open rates
Usability
- Easy to use
Tool Level
- Beginner
Pricing
- Free
3. SubjectLine.com
This subject line tester gives you an overall score of your subject line with reasons that made you lose points.
It’s one of the email marketing tools you can leverage to better understand what kind of email content can improve open and response rates.
Key Features
- Offers results based on factors like urgency, length, prepositions, spam-related issues, etc.
- Advises whether email subject lines need to be rewritten
Pros
- It evaluates filtering and deliverability issues so that your emails don’t trigger spam filters
Cons
- It does not specify ways to improve email open rates by optimizing subject lines
Usability
- Easy to use
Tool Level
- Beginner/Intermediate
Pricing
- Free
4. The #1 Email Subject Line Tester by CoSchedule
Improve your email and newsletter open rates by leveraging this subject line tester from CoSchedule.
Why use it?
You get suggestions on how to optimize the subject line for higher open rates.
Key Features
- A word bank with words that increase and decrease opens
- Gives results depending on case used, number of words used, emojis, character count, etc.
Pros
- Offers a preview of your email subject lines on desktop and mobile
Cons
- It offers limited factors showing what you can do to increase open rates
Usability
- Easy to use
Tool Level
- Beginner
Pricing
- Free
5. SendCheckIt
This subject line tester claims to compare your subject line against more than 100K other emails sent by marketers.
And considering how content personalization is crucial, this subject line tester also scores your performance based on this factor.
Key Features
- It gives you an overall score out of 100
- Considers factors including scanability, length, sentiment, personalization, and reading level
- Informs you of factors that could affect deliverability like an exclamation mark, spammy words, etc.
Pros
- In-depth score breakdown
- API access
Cons
- Some of the suggestions require further explanation
Usability
- Moderately easy to use
Tool Level
- Intermediate/Expert
Pricing
- Free
6. Email Subject Line Grader
This subject line tester by Net Atlantic helps you score your headline and calculate character count.
It’s also a good tool when you want to calculate word balance and mix.
Originally published at Attrock.com.
About The Author
Gaurav Sharma is the Founder and CEO of Attrock, a results-driven digital marketing company. Grew an agency from 5-figure to 7-figure revenue in just two years.
