Why Open Standards Matter for Business Email

When you choose an email provider, you are not just choosing a product — you are choosing a set of protocols that determine how portable your data is.

The Lock-In Problem

Google uses proprietary APIs for Gmail. Microsoft uses Exchange ActiveSync and Graph API. Both work well within their ecosystems. The moment you want to leave? Good luck.

Migration from proprietary platforms is painful precisely because they do not use open standards. Your emails might be portable via IMAP, but your calendar events, contact groups, drive files, and shared folders? Those require custom migration tools.

The Open Standards Approach

Nubo.Email is built entirely on open, IETF-standardized protocols:

• JMAP — For email (RFC 8620, 8621)
• CalDAV — For calendars (RFC 4791)
• CardDAV — For contacts (RFC 6352)
• WebDAV — For file storage (RFC 4918)

Every piece of your data can be accessed through standard protocols that any compliant client can speak. Want to use a different calendar app? It works via CalDAV. Prefer a different contacts manager? CardDAV. Want to switch email providers entirely? JMAP ensures your data is portable.

No Lock-In, By Design

We earn your business every month by being the best option — not by making it hard to leave. Open standards mean you are always free to switch.

That is how it should be.