ProtonMail is an end-to-end encrypted email service based in Switzerland.
Free tier available, premium plans starting at $5/month
Best Kolab Now Alternatives ranked by AI · updated May 2025
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Kolab Now is a secure and private collaboration suite offering email, calendar, file storage, and more.
Price: Starting at $4.99 per month
🎯 kolabnow.com
Top 6 Kolab Now alternatives
Zoho Workplace is a business productivity suite with word processing, spreadsheets, email, storage, and collaboration tools. It targets small businesses and teams...
Pros
- Lower-cost business plans than Google Workspace and Microsoft 365
- Includes email, storage, documents, and spreadsheets in one suite
- Provides useful team administration and business collaboration tools
Cons
- Document and spreadsheet compatibility is less consistent than Microsoft 365
- Interface and workflows can feel less polished than Google Workspace
- Third-party integration ecosystem is smaller than Google’s
From $3/user/mo
FastMail is a secure and reliable email service provider known for its speed and efficiency.
Starting at $3/month
Zimbra is an enterprise-class email, calendar, and collaboration solution built for the cloud, both public and private.
Starting at $6 per mailbox per year
Tutanota is an open-source end-to-end encrypted email software and freemium hosted secure email service.
Freemium
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
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