Is AI able to write more interesting subject lines? Perhaps. AI has helped brands like JOANN increase their email opening rates by 10 percent.
It can be hard to create great subject lines for every email unless you are an expert in the field. It’s especially important if you send personalized emails several times a week.
You may also need to test multiple subject lines to determine the most effective one. It is time-consuming to do this!
In this post, we will discuss how AI can be used to create email subject lines and why it is important that you take AI into consideration when creating email subject lines. Also, you will learn some of the most effective AI subject line generators.
What AI can do with your email subject line
AI is still an emerging technology. Although they look great on paper, their full potential has not been reached. There are also other AI content creators who have grown quickly to be game changers.
This second group is responsible for the AI boom we see today. Two technologies in particular have been responsible for AI’s progress.
- Natural Language Processing (NLP).
- Natural Language Generation
When a machine reads text, it is called NLP. The machine converts the text to code, which it can then interpret. NLG occurs when the machine generates its own text using that code.
They are used in AI-powered tools for marketing, such as AcroLinux. This tool uses NLP technology to evaluate your content and make recommendations. NLP is also used to write email subject lines.
AI-based tools are not only time saving, but they also train developers on how to engage with email.
The data is based on best email practices. This allows AI to generate subject lines without bias, which can result in higher open rates.
Perry Malm states that “when humans make decisions, they take into account their experiences, beliefs, and thoughts.” It can lead to bias, and we may choose subject lines which are not the most appropriate.
AI, however, is not biased and is only trained with clean data. Parry says that AI outputs are based on patterns matching which can be invisible to humans and is free of biases.
Let’s now look at the top AI tools that can be used to generate email subject lines.
Four AI tools for generating email subject lines
The AI subject line generators I used were not very good. The subject lines of some outputs did not adhere to best practices.
Here are my four picks for the top AI-based email subject lines generators of 2023.
1. HubSpot AI Email Writer
Get started with HubSpot AI Email Writer
HubSpot AI Email Writer allows you to automate the creation of email copy for email marketing and sales outreach. You can tailor the email copy to different audiences by asking them to use different tones.
Choose from email templates and customize emails using slash commands and highlight commands.
HubSpot AI Email Writer also integrates seamlessly with HubSpot CRM, allowing you to log all conversations and contacts automatically.
Price determination: Free.
2. Persado
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best for: venture companies
Persado, an AI platform, allows users to personalize communication at scale while inspiring audiences to act.
The brand, which has raised $66 million, offers AI-based email subject lines and automated social media and language creation for enterprise marketing.
One reviewer who is an email marketing and analytics senior expert says:
“We have seen a significant increase in the open rate of our emails with Persado and have been able learn more about our audiences. Persado categorizes the subject lines based on their sentiment. This gives you insight into the language your audience responds to, and takes the stress out of writing large volumes of subject line.
Price determination: Pricing available upon request.
3. Phrase
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best for: Medium-sized and enterprise companies
Phrase is an AI-powered tool that creates email subject lines, writes email copy and generates email CTAs. It analyzes email data and then creates subject lines, copy, and CTAs.
Subject lines generated by the software are more effective than those created manually. It uses the information it gathers from your email to remain consistent with your brand.
Freese assisted Virgin Holidays in increasing its open rates by 2 %. This might not sound like much but it translated into millions in new revenue. It has also simplified a process which previously took weeks to complete. Now, it only takes seconds.
Pricing:Freese pricing starts at $500 a month, payable annually. For enterprise features you’ll need to get a quote from Freese.
4. ChatGPT
best for: Individuals and companies looking for free AI tools
You’ve probably heard about ChatGPT. ChatGPT, a free AI-based tool, provides you with the most appropriate responses depending on your signal quality.
It’s not enough to ask ChatGPT to generate a subject. Ask to create the subject line for an email that you are sending.
You can also use the following prompts to generate subject lines.
- Create 10 subject lines using the email below. The subject lines should each include the percentage likelihood that it will be opened. This is the email …”
- Write 10 subject lines to the email below. The subject lines should all end in a question, and include an emoji to indicate curiosity.
- Write 10 subject lines to the email addresses below. The subject lines must contain seven words and not more. They should also end with a “?”
A Pro Tip: To get the best out of ChatGPT you must be specific in your signals.
Use AI email subject line generators
The AI system is able to operate with a minimum of human intervention. HubSpot understands the importance of this.
We’re working on HubSpot’s AI, a content assistant. ChatSpot is a tool for creating email subject lines or even emails.