Several analytics extensions are popular among email marketers:
1. Google Analytics: Integrates seamlessly with many email marketing platforms to provide comprehensive tracking and reporting. 2. Litmus: Offers detailed insights into email performance, including rendering issues and spam filter tests. 3. HubSpot: Provides robust email analytics along with automation features. 4. Mailchimp Analytics: Offers a range of metrics and insights specifically for email campaigns. 5. SendGrid: Known for its real-time analytics and detailed reporting.