Mailchimp

Step 1: Setup API Key

Step 2: Setup Form

This is code form:

<div class="mc4wp-form">
  <div class="ova-mc4wp-form">		
      <div class="email">
          <input type="email" name="EMAIL" placeholder="Email Address" required />
      </div>
      <div class="submit">
 		<button type="submit">
          <span>Go</span>
    	</button>
      </div>
    </div>
</div>
<p style="display:none">
    <label>List choice</label>
    <label>
        <input name="_mc4wp_lists[]" type="checkbox" value="a328b7e698" checked="true"> <span>Ovatheme</span>
    </label>
</p>