One of the benefits of being an Elementor Pro user is that you can integrate your Elementor with popular third-party marketing tools, including Mailchimp. By integrating Elementor with Mailchimp and the similar services, you will be able to install an email subscription form on your website on any spot.
Be it on a single post, sidebar, a landing page, homepage, and so on.
Mailchimp itself is one of the most popular email marketing tools. It allows you to collect email subscribers and send a certain campaign with a more personal touch compared to social media.
No additional plugin is required to integrate Elementor with Mailchimp. You just need to create an API key to get started.
How to Integrate Elementor with Mailchimp
As mentioned above, you need to create a Mailchimp API key in order to be able to integrate your Mailchimp account with Elementor. To do so, visit the Mailchimp website and login with your account.
On the Mailchimp dashboard, go to your profile by clicking your profile icon on the top bar and select Profile.

On your profile page, select Extras -> API Keys.

To create a new API key, click the Create A Key button.

Copy the API key. If you want, you can also add a label to your API key to make it easy for you to identify it in case you want to add more API keys in the future.

Login to your WordPress dashboard and go to Elementor -> Settings.

On the Elementor settings page, click the Integrations tab. Scroll down to the Mailchimp section and paste the API key you have just created above. Click the Validate API Key button.
Don’t forget to click the Save Changes button at the bottom to apply the new change.

How to Connect an Elementor Form with Mailchimp
Once you are done integrating your Mailchimp account with Elementor, you can now add an email subscription form on your website and connect the form with your Mailchimp account.
To do so, add a new form by dragging the Form widget from the left panel.

Customize your form and tailor the content according to your needs. Once you are done, open the Actions After Submit option under the Content tab and add Mailchimp.

You will see a new option called Mailchimp under the Content tab. Open this option to make the settings. On the API Key option, leave it to default. On the Audience section, select an existing audience on your Mailchimp account.
You can also add an existing group if you have one. On the Field Mapping option, set the values according to your needs.

You can now publish your page once it is ready. To check if everything went well, try to fill in the form you have just created and login to Mailchimp.
On the Mailchimp dashboard, select the audience according to your form setting and view the contacts.
Check the source of your contacts. If you find a contact from your API, this means that everything has gone well.
The Bottom Line
Elementor has a form builder feature that you can use to create an email subscription form, which you can connect with Mailchimp and the similar services.
So, there is no need to install an extra plugin if you want to integrate your website with your Mailchimp account.
Just make sure you have access to the Mailchimp API key since the integration requires it.