Microsoft 365 (Exchange Online) is the world's most widely used business email and office solution, offering 50GB mailboxes, 1TB OneDrive storage, and deep integration with Word, Excel, and Teams — the benchmark choice for enterprise productivity.
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Google Workspace offers professional business email with custom domain support, 30GB+ storage, and deep integration with Google Docs, Meet, and Calendar. Gmail has over 1.8 billion active users, making it the world's most popular email service.
Google Workspace (formerly G Suite) is Google's enterprise office suite integrating Docs, Sheets, Slides, Gmail, Drive, and Meet for over 3 billion users. Real-time collaboration, a 99.9% SLA, and deep AI make it the leading alternative to Microsoft 365.
Tencent Enterprise Email, from Tencent (founded 1998), builds on QQ Mail's technology with deep WeChat integration. The free tier supports 50 users, making it China's most widely used business email service.
Outlook.com (formerly Hotmail) is Microsoft's free personal email service, founded in 1996 with 400M+ active users. Deeply integrated with the Microsoft 365 ecosystem for email, calendar, contacts, and cloud storage.
Founded in 1997 and headquartered in Germany, GMX is one of Germany's largest free email services (part of United Internet Group), serving over 20 million active users with 65 GB free cloud storage and an integrated online office suite.
Yandex 360 is Yandex's all-in-one business collaboration platform, offering custom domain email, cloud storage, document editing, and video conferencing—the leading Google Workspace alternative in Russia and the CIS.
Rackspace Email, from Rackspace Technology (founded 1998), specializes in Microsoft Exchange hosted email with 99.999% SLA, Fanatical Support, and compliance archiving capabilities.
Mailfence was founded in 2017, headquartered in Brussels, Belgium, providing end-to-end encrypted email with built-in OpenPGP. Integrated calendar, contacts, and document storage with a free tier for basic secure communication.
Mailbox.org, founded in 2014, is Heinlein Support's green encrypted email service based in Berlin, Germany. Powered by OpenXchange, it offers encrypted business email, cloud storage, and online office suite starting at €1/month.
Zoho Mail was founded in 2008 and is headquartered in Chennai, India. It is one of the most cost-effective business email services, offering a free plan with 5 users/5GB storage, paid plans from $1/user/month, and a clean ad-free interface with deep Zoho ecosystem integration.
NetEase Enterprise Email, operated by NetEase (founded 1997), powers over 500 million users via its 163 Mail platform. Offers custom domain business email, anti-spam, and office suite services.