Nextcloud Mail is described as '💌 Mail app for Nextcloud' and is a Email Client in the office & productivity category. There are more than 25 alternatives to Nextcloud Mail for a variety of platforms, including Windows, Linux, Mac, BSD and Android Tablet apps. The best Nextcloud Mail alternative is Thunderbird, which is both free and Open Source. Other great apps like Nextcloud Mail are K-9 Mail, Microsoft Office Outlook, FairEmail and Evolution.
Nextcloud Mail alternatives are mainly Email Clients but may also be Calendar Apps or WebMail Providers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Nextcloud Mail.