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.
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.
Dropbox is a cloud storage and file sync platform founded in 2007 in San Francisco, with over 700 million registered users, 2GB free and 2TB paid plans, and an ecosystem spanning Paper, Sign, Capture and AI search, listed on NASDAQ in 2018.
iDrive was founded in 1998 by Rahul Sood and Matthew R., headquartered in Calabasas, California, USA. It is a leading global provider of cloud backup and cloud storage services, known for its "one account, unlimited devices" backup model for individuals, families, businesses, and IT administrators.
Kolab Now, founded in 2008 in Switzerland, is built on the open-source Kolab groupware framework. It offers end-to-end encrypted email, calendar, contacts, tasks, and file management as a secure collaboration suite under Swiss privacy law.
Backblaze is a US cloud storage and backup provider whose core products include B2 cloud storage (low-cost object storage) and Computer Backup (unlimited personal computer backup), known for transparent pricing and extremely low cost, with a Cloudflare bandwidth alliance for free CDN egress.
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.
Backblaze B2 is the low-cost object storage service from Backblaze, priced at roughly 1/5 of AWS S3, S3-compatible, with a Cloudflare bandwidth alliance for free CDN egress, plus Computer Backup for unlimited device backup.
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.
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.