Which one should I pick for a new project?

I can only answer questions about matomo-org/matomo or phpmailer/phpmailer.

However, I can help you understand what each project does so you can make an informed decision:

[phpmailer/phpmailer] is a mail-sending library. It's a focused, single-purpose tool for composing and sending email messages via SMTP or other transports. Use this if you need email functionality in your application.

[matomo-org/matomo] is a complete analytics platform. It's a full-featured PHP/MySQL application for collecting, visualizing, and analyzing website and app data—a self-hosted alternative to Google Analytics.

They solve completely different problems:

• Pick PHPMailer if you're building an application that needs to send emails
• Pick Matomo if you're deploying a privacy-focused analytics solution for websites/apps

If your question is about which library to use for email in your Matomo instance or how Matomo uses email, I can help with that. Or if you want to know about the quality/maintenance of either project, I can reference the RepoPilot signals in the data above.

FOLLOW_UPS:

• How does Matomo send emails if at all?
• What email libraries does Matomo depend on?
• Does phpmailer integrate with Matomo?